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Wang Ji - One of the best experts on this subject based on the ideXlab platform.
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THE PREPARATION AND PERFORMANCE OF High Temperature Adhesive CURED AT ROOM Temperature
New Carbon Materials, 2020Co-Authors: Wang JiAbstract:High Temperature Adhesive bonding is one of the promising methods for joining carbon materials. A High Temperature Adhesive cured at room Temperature was prepared by adding a curing agent of phosphoric acid to a mixture of phenol formaldehyde resin (PF) and boron carbide (B 4C). The graphite materials were bonded by the above Adhesive and treated at different Temperatures. Shear strength was tested at room Temperature. Results showed that the High Temperature Adhesive cured at room Temperature had satisfied bonding performance for graphite materials. The Adhesive strength was larger than that for a thermally (200?℃) cured High Temperature Adhesive. In addition, the relation between Adhesive performance and structure after being treated at different Temperatures was also discussed. It revealed that the phosphoric acid condensed and converted into poly phosphoric acid during heat treatment and the chemical bond joining was introduced between the poly phosphoric acid and graphite matrix.
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INFLUENCE OF HEAT TREATMENT ON THE CONDUCTIVITY OF GRAPHITE JOINT BONDED BY High Temperature Adhesive
New Carbon Materials, 2020Co-Authors: Wang JiAbstract:High Temperature Adhesives were prepared with phenol formaldehyde resin as matrix and B 4C powders as additives. The graphite samples bonded by the above Adhesives were heat treated at different Temperatures ranged from 200?℃ to 1?500?℃. Subsequently their conduct electricity was tested. The structure of the joint was also characterized by means of XRD and SEM. The results showed that the heat treatment Temperature had critical influence on the joints' conduct electivity. The specific resistance reach its maximum value when the graphite joints were treated at 200?℃ because of the non conduct character of phenol formaldehyde resin. But the specific resistance of the joint decreased rapidly with increasing of heat treatment Temperature below 1?000?℃. With the treatment Temperatures rising Higher than 1?000?℃, the graphite joints showed satisfing conductivity performance with specific resistance decreased slowly. Additionally, the boron carbide also had important influenced on the electrical conductivity of the joint due to its semi conductor and graphitzation effect.
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IR Analysis of Pyrolysis Process of Phenol-formaldehyde Resin Mixed with White Carbon Black and B_4C Particles
Materials Science and Engineering, 2020Co-Authors: Wang JiAbstract:In the present paper, pyrolysis process of phenol\|formaldehyde resin mixed with white carbon black(nano\|silica) and boron carbide powders was investigated. The material was used as a High Temperature Adhesive for graphite bonding. Based on the IR analysis results of the Adhesives heat\|treated at different Temperatures, the relationship between change of the composition and structure of the Adhesives and the Adhesive strength were discussed.
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Research on Adhesion between the Adhesives Consisting of Phenol-Formaldehyde Resin Mixed with White Carbon Black and B_4C Powders and Graphite at High Temperatures
Journal of Materials Engineering, 2020Co-Authors: Wang JiAbstract:White carbon black particles were introduced into the formal Adhesive consisting of phenol formaldehyde resin mixed with B 4C powders to prepare a novel High Temperature Adhesive Graphite materials were bonded with the Adhesive and their shear strength after heat treatment at different Temperatures were tested subsequently It was indicated that the novel Adhesives possessed excellent heat resistivity and good adhesion to graphite with the Temperature up to 2550℃ Photography of fractured sections of the bonded samples were observed by SEM The relationship between the composition, structure of the Adhesives and the Adhesive shear strength of the bonded samples was analyzed Results demonstrated that white carbon black′s introduction was helpful to improve the density and adhesion at the interface of the bonded samples
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STUDY ON THE THERMAL SHOCK RESISTANCE OF GRAPHITE COMPONENTS BONDED WITH High Temperature AdhesiveS
New Carbon Materials, 2020Co-Authors: Wang JiAbstract:A High Temperature Adhesive (HTA) was prepared using Phenol Formaldehyde Resin (PF) as matrix and ceramic powers as additives to modify the performance. The graphite materials were bonded and treated at 800?℃, 1?000?℃, and 1?200?℃ and the thermal shock resistance experiments were carried out. The critical thermal shock Temperatures were 800?℃ and 1?000?℃. Results of shear strength test showed that the graphite components bonded with the above HTA had satisfactory thermal shock resistance. The percentage of retained strength was High even after the bonded samples had experienced several thermal shock experiments. In addition, the factors that influenced the thermal shock resistance are also discussed, and some suggestions for enhancing the thermal shock resistance, such as optimizing the composition of HTA, increasing heat treatment Temperature and controlling the cement thickness are discussed.
Shantanu Bhowmik - One of the best experts on this subject based on the ideXlab platform.
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Atmospheric plasma modification of polyimide sheet for joining to titanium with High Temperature Adhesive
International Journal of Adhesion and Adhesives, 2016Co-Authors: Muhammad Nadeem Akram, K.m.b. Jansen, L.j. Ernst, Shantanu BhowmikAbstract:Abstract This investigation Highlights the rationale of Adhesive bonding of atmospheric pressure plasma treated High Temperature resistant polymeric sheet such as polyimide sheet (Meldin 7001), with titanium sheets. The surface of polyimide (PI) sheet was treated with atmospheric pressure plasma for different exposure times. The surface energy was found to increase with increase in exposure time. However, longer exposure time of plasma, results in deterioration of the surface layer of PI resulting in degradation and embrittlement. Contact angle measurements with sessile drop technique were carried out for estimation of surface energy. SEM (EDS) and AFM analyses of treated and untreated specimens were carried out to examine the surface characteristics and understanding morphological changes following surface treatment. Untreated samples and atmospheric pressure plasma treated samples of polyimide Meldin 7001 sheet were bonded together as well as with titanium substrates to form overlap joints. Single lap shear tensile testing of these Adhesively bonded joints was performed to measure bond strength and to investigate the effect of surface treatment on Adhesive bond strength. An optimized plasma treatment time results in maximum Adhesive bond strength and consequently, this technology is Highly acceptable for aviation and space applications.
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Atmospheric pressure plasma surface modification of titanium for High Temperature Adhesive bonding
International Journal of Adhesion and Adhesives, 2011Co-Authors: Muhammad Nadeem Akram, K.m.b. Jansen, L.j. Ernst, Shantanu BhowmikAbstract:In this investigation surface treatment of titanium is carried out by plasma ion implantation under atmospheric pressure plasma in order to increase the Adhesive bond strength. Prior to the plasma treatment, titanium surfaces were mechanically treated by sand blasting. It is observed that the contact angle of de-ionized water decreases with the grit blast treatment time. Optical microscopy and scanning electron microscopic (SEM) analysis of untreated and atmospheric plasma treated titanium are carried out to examine the surface characteristics. A substantial improvement in the surface energy of titanium is observed after the atmospheric pressure plasma treatment. The surface energy increases with increasing exposure time of atmospheric pressure plasma. The optimized time of plasma treatment suggested in this investigation results in maximum Adhesive bond strength of the titanium.Unmodified and surface modified titanium sheets by atmospheric pressure plasma were Adhesively bonded by High Temperature resistant polyimide Adhesive. The glass transition Temperature of this Adhesive is 310 C and these Adhesively bonded joints were cured at High Temperature. A substantial improvement in Adhesive bond strength was observed after atmospheric pressure plasma treatment. NOTICE: this is the author’s version of a work that was accepted for publication in International Journal of Adhesion & Adhesives. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in International Journal of Adhesion & Adhesives, 31 (7), 2011
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Atmospheric pressure plasma surface modification of titanium for High Temperature Adhesive bonding
International Journal of Adhesion and Adhesives, 2011Co-Authors: Mohammad Akram, Muhammad Akram, K.m.b. Jansen, L.j. Ernst, Shantanu Bhowmik, Showmik BhowmikAbstract:In this investigation surface treatment of titanium is carried out by plasma ion implantation under atmospheric pressure plasma in order to increase the Adhesive bond strength. Prior to the plasma treatment, titanium surfaces were mechanically treated by sand blasting. It is observed that the contact angle of de-ionized water decreases with the grit blast treatment time. Optical microscopy and scanning electron microscopic (SEM) analysis of untreated and atmospheric plasma treated titanium are carried out to examine the surface characteristics. A substantial improvement in the surface energy of titanium is observed after the atmospheric pressure plasma treatment. The surface energy increases with increasing exposure time of atmospheric pressure plasma. The optimized time of plasma treatment suggested in this investigation results in maximum Adhesive bond strength of the titanium. Unmodified and surface modified titanium sheets by atmospheric pressure plasma were Adhesively bonded by High Temperature resistant polyimide Adhesive. The glass transition Temperature of this Adhesive is 310 ??C and these Adhesively bonded joints were cured at High Temperature. A substantial improvement in Adhesive bond strength was observed after atmospheric pressure plasma treatment. ?? 2011 Elsevier Ltd. All rights reserved.
Muhammad Nadeem Akram - One of the best experts on this subject based on the ideXlab platform.
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Atmospheric plasma modification of polyimide sheet for joining to titanium with High Temperature Adhesive
International Journal of Adhesion and Adhesives, 2016Co-Authors: Muhammad Nadeem Akram, K.m.b. Jansen, L.j. Ernst, Shantanu BhowmikAbstract:Abstract This investigation Highlights the rationale of Adhesive bonding of atmospheric pressure plasma treated High Temperature resistant polymeric sheet such as polyimide sheet (Meldin 7001), with titanium sheets. The surface of polyimide (PI) sheet was treated with atmospheric pressure plasma for different exposure times. The surface energy was found to increase with increase in exposure time. However, longer exposure time of plasma, results in deterioration of the surface layer of PI resulting in degradation and embrittlement. Contact angle measurements with sessile drop technique were carried out for estimation of surface energy. SEM (EDS) and AFM analyses of treated and untreated specimens were carried out to examine the surface characteristics and understanding morphological changes following surface treatment. Untreated samples and atmospheric pressure plasma treated samples of polyimide Meldin 7001 sheet were bonded together as well as with titanium substrates to form overlap joints. Single lap shear tensile testing of these Adhesively bonded joints was performed to measure bond strength and to investigate the effect of surface treatment on Adhesive bond strength. An optimized plasma treatment time results in maximum Adhesive bond strength and consequently, this technology is Highly acceptable for aviation and space applications.
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Surface Modification of Titanium and Polyimide Sheet for Adhesive Bonding
2015Co-Authors: Muhammad Nadeem AkramAbstract:Major industrial sectors like automotive, aerospace and others are increasingly using polymer composites in their structural parts. Polyimide sheet and Adhesives, are High performance polymers. They are widely used in various engineering applications due to their excellent thermal, mechanical and chemical properties and their resistance to radiation and fire. Unfortunately, the surface of polyimide like any other polymer is inert and exhibits poor adhesion properties. It is established that for successful application of polymeric composite materials to form structural parts using Adhesive bonding, they need to have special surface properties like hydrophilicity. The surface modification of polymers and metals play a predominant role in enhancing the surface energy for improved adhesion properties. The aerospace industry is giving special attention to surface modification of titanium which could enhance the Adhesive bond durability. In general, surface modification of titanium is carried out by chromic acid anodization. In this thesis work, an alternative surface preparation technique of titanium is investigated which could be of the interest for future research. We propose to modify the surface of titanium by plasma ion implantation, This is clean and solvent free technique, which could possibly be of interest to the aerospace industry in terms of Adhesive bond strength and durability. It is also noted that in search of the long term durability and efficient service performance in the context of the future generation of aerospace structures, there is an increasing need of metal-polymer composites. Therefore, work of particular relevance to this project has been on the improvement of High performance polymer-titanium composites through High performance Adhesive bonding. Several methods may be employed for modifying the surfaces of polymers and metals, which range from wet chemical processes to dry physical processes. Dry processes, like electrical treatment by exposure to plasma have received special attention because of the uniformity of these surface modifications, its precise control and the absence of chemical hazards. It is now well known that the plasma treatment creates physical and chemical changes such as cross linking, degradation, formation of free radicals, oxygen ions functionalisation and etching. A High Temperature resistant and thermally stable polyimide Adhesive as supplied by Creative materials Inc. was selected. TGA, DSC and FTIR analyses of this High performance polyimide Adhesive were performed. After analysis, the polyimide Adhesive is used as the standard Adhesive for joining and testing materials in this project. There are mainly two types of surface treatments i.e. mechanical treatment and atmospheric pressure plasma treatment, that are combined in the present research. The grit blasting and atmospheric pressure plasma treatment time is optimized to get optimum values of surface roughness and surface energy. When these surfaces with optimum values of surface roughness and surface energy are joined together using the PI Adhesive, a remarkable increase in the value of the Adhesive bond strength during lap-shear testing is obtained. The bond strength is increased by two and half times compared to the lap-shear test results of untreated surfaces. The characterization of untreated and treated titanium surfaces with XPS, SEM, a surface roughness profiler and a contact angle analyser is performed. The Lap-shear test results suggest that the bond strength increases with an increase in surface energy. The surface roughness profiler results show that the surface energy increases with an increase in surface roughness. FTIR results suggest that the surface energy increases with a decrease in carbon contents and an increase in oxygen contents in the top layers of the titanium surface. The characterisation of the polymer surface after exposure to plasma reveals that the polar component of the surface energy increases due to chain scission and oxidation, leading to generation of polar groups such as C-O, C=O & COO on the polymer surface. Therefore, the total surface energy also increases, leading to enhanced adhesion. AFM analysis of polyimide sheet indicates that there is an increase in surface energy with an increase in surface roughness. In the last part of this research work, the effects of the moisture and High Temperature on the Adhesive bond strength of the modified surfaces is investigated. At High Temperature and relative humidity conditions, moisture ingression in the Adhesive bond line takes place at a faster pace than at room Temperature. The modified surface Adhesive bonds retain their bond strength at High Temperature, while heated in dry environment. In case of moisture pre–condition at elevated Temperature before lap-shear testing, the bond loses the improved bond strength, possibly due to the attack of polar water molecules on the interface bonds of titanium and polyimide Adhesive. The present work aims to contribute to the knowledge and understanding of several aspects of the surface treatment of metals and polymers for Adhesive bonding in High Temperature applications. Different problems related to the surface treatment and Adhesive bonding for High Temperature application has been discussed. Efforts are made to evaluate the performance of the Adhesive bonds between modified titanium and polyimide at elevated moisture and Temperature conditions. The present work has produced some encouraging results to perform further research on surface treatment methods for coating and High Temperature Adhesive material for different aerospace applications.
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Atmospheric pressure plasma surface modification of titanium for High Temperature Adhesive bonding
International Journal of Adhesion and Adhesives, 2011Co-Authors: Muhammad Nadeem Akram, K.m.b. Jansen, L.j. Ernst, Shantanu BhowmikAbstract:In this investigation surface treatment of titanium is carried out by plasma ion implantation under atmospheric pressure plasma in order to increase the Adhesive bond strength. Prior to the plasma treatment, titanium surfaces were mechanically treated by sand blasting. It is observed that the contact angle of de-ionized water decreases with the grit blast treatment time. Optical microscopy and scanning electron microscopic (SEM) analysis of untreated and atmospheric plasma treated titanium are carried out to examine the surface characteristics. A substantial improvement in the surface energy of titanium is observed after the atmospheric pressure plasma treatment. The surface energy increases with increasing exposure time of atmospheric pressure plasma. The optimized time of plasma treatment suggested in this investigation results in maximum Adhesive bond strength of the titanium.Unmodified and surface modified titanium sheets by atmospheric pressure plasma were Adhesively bonded by High Temperature resistant polyimide Adhesive. The glass transition Temperature of this Adhesive is 310 C and these Adhesively bonded joints were cured at High Temperature. A substantial improvement in Adhesive bond strength was observed after atmospheric pressure plasma treatment. NOTICE: this is the author’s version of a work that was accepted for publication in International Journal of Adhesion & Adhesives. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in International Journal of Adhesion & Adhesives, 31 (7), 2011
K.m.b. Jansen - One of the best experts on this subject based on the ideXlab platform.
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Atmospheric plasma modification of polyimide sheet for joining to titanium with High Temperature Adhesive
International Journal of Adhesion and Adhesives, 2016Co-Authors: Muhammad Nadeem Akram, K.m.b. Jansen, L.j. Ernst, Shantanu BhowmikAbstract:Abstract This investigation Highlights the rationale of Adhesive bonding of atmospheric pressure plasma treated High Temperature resistant polymeric sheet such as polyimide sheet (Meldin 7001), with titanium sheets. The surface of polyimide (PI) sheet was treated with atmospheric pressure plasma for different exposure times. The surface energy was found to increase with increase in exposure time. However, longer exposure time of plasma, results in deterioration of the surface layer of PI resulting in degradation and embrittlement. Contact angle measurements with sessile drop technique were carried out for estimation of surface energy. SEM (EDS) and AFM analyses of treated and untreated specimens were carried out to examine the surface characteristics and understanding morphological changes following surface treatment. Untreated samples and atmospheric pressure plasma treated samples of polyimide Meldin 7001 sheet were bonded together as well as with titanium substrates to form overlap joints. Single lap shear tensile testing of these Adhesively bonded joints was performed to measure bond strength and to investigate the effect of surface treatment on Adhesive bond strength. An optimized plasma treatment time results in maximum Adhesive bond strength and consequently, this technology is Highly acceptable for aviation and space applications.
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Atmospheric pressure plasma surface modification of titanium for High Temperature Adhesive bonding
International Journal of Adhesion and Adhesives, 2011Co-Authors: Muhammad Nadeem Akram, K.m.b. Jansen, L.j. Ernst, Shantanu BhowmikAbstract:In this investigation surface treatment of titanium is carried out by plasma ion implantation under atmospheric pressure plasma in order to increase the Adhesive bond strength. Prior to the plasma treatment, titanium surfaces were mechanically treated by sand blasting. It is observed that the contact angle of de-ionized water decreases with the grit blast treatment time. Optical microscopy and scanning electron microscopic (SEM) analysis of untreated and atmospheric plasma treated titanium are carried out to examine the surface characteristics. A substantial improvement in the surface energy of titanium is observed after the atmospheric pressure plasma treatment. The surface energy increases with increasing exposure time of atmospheric pressure plasma. The optimized time of plasma treatment suggested in this investigation results in maximum Adhesive bond strength of the titanium.Unmodified and surface modified titanium sheets by atmospheric pressure plasma were Adhesively bonded by High Temperature resistant polyimide Adhesive. The glass transition Temperature of this Adhesive is 310 C and these Adhesively bonded joints were cured at High Temperature. A substantial improvement in Adhesive bond strength was observed after atmospheric pressure plasma treatment. NOTICE: this is the author’s version of a work that was accepted for publication in International Journal of Adhesion & Adhesives. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in International Journal of Adhesion & Adhesives, 31 (7), 2011
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Atmospheric pressure plasma surface modification of titanium for High Temperature Adhesive bonding
International Journal of Adhesion and Adhesives, 2011Co-Authors: Mohammad Akram, Muhammad Akram, K.m.b. Jansen, L.j. Ernst, Shantanu Bhowmik, Showmik BhowmikAbstract:In this investigation surface treatment of titanium is carried out by plasma ion implantation under atmospheric pressure plasma in order to increase the Adhesive bond strength. Prior to the plasma treatment, titanium surfaces were mechanically treated by sand blasting. It is observed that the contact angle of de-ionized water decreases with the grit blast treatment time. Optical microscopy and scanning electron microscopic (SEM) analysis of untreated and atmospheric plasma treated titanium are carried out to examine the surface characteristics. A substantial improvement in the surface energy of titanium is observed after the atmospheric pressure plasma treatment. The surface energy increases with increasing exposure time of atmospheric pressure plasma. The optimized time of plasma treatment suggested in this investigation results in maximum Adhesive bond strength of the titanium. Unmodified and surface modified titanium sheets by atmospheric pressure plasma were Adhesively bonded by High Temperature resistant polyimide Adhesive. The glass transition Temperature of this Adhesive is 310 ??C and these Adhesively bonded joints were cured at High Temperature. A substantial improvement in Adhesive bond strength was observed after atmospheric pressure plasma treatment. ?? 2011 Elsevier Ltd. All rights reserved.
L.j. Ernst - One of the best experts on this subject based on the ideXlab platform.
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Atmospheric plasma modification of polyimide sheet for joining to titanium with High Temperature Adhesive
International Journal of Adhesion and Adhesives, 2016Co-Authors: Muhammad Nadeem Akram, K.m.b. Jansen, L.j. Ernst, Shantanu BhowmikAbstract:Abstract This investigation Highlights the rationale of Adhesive bonding of atmospheric pressure plasma treated High Temperature resistant polymeric sheet such as polyimide sheet (Meldin 7001), with titanium sheets. The surface of polyimide (PI) sheet was treated with atmospheric pressure plasma for different exposure times. The surface energy was found to increase with increase in exposure time. However, longer exposure time of plasma, results in deterioration of the surface layer of PI resulting in degradation and embrittlement. Contact angle measurements with sessile drop technique were carried out for estimation of surface energy. SEM (EDS) and AFM analyses of treated and untreated specimens were carried out to examine the surface characteristics and understanding morphological changes following surface treatment. Untreated samples and atmospheric pressure plasma treated samples of polyimide Meldin 7001 sheet were bonded together as well as with titanium substrates to form overlap joints. Single lap shear tensile testing of these Adhesively bonded joints was performed to measure bond strength and to investigate the effect of surface treatment on Adhesive bond strength. An optimized plasma treatment time results in maximum Adhesive bond strength and consequently, this technology is Highly acceptable for aviation and space applications.
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Atmospheric pressure plasma surface modification of titanium for High Temperature Adhesive bonding
International Journal of Adhesion and Adhesives, 2011Co-Authors: Muhammad Nadeem Akram, K.m.b. Jansen, L.j. Ernst, Shantanu BhowmikAbstract:In this investigation surface treatment of titanium is carried out by plasma ion implantation under atmospheric pressure plasma in order to increase the Adhesive bond strength. Prior to the plasma treatment, titanium surfaces were mechanically treated by sand blasting. It is observed that the contact angle of de-ionized water decreases with the grit blast treatment time. Optical microscopy and scanning electron microscopic (SEM) analysis of untreated and atmospheric plasma treated titanium are carried out to examine the surface characteristics. A substantial improvement in the surface energy of titanium is observed after the atmospheric pressure plasma treatment. The surface energy increases with increasing exposure time of atmospheric pressure plasma. The optimized time of plasma treatment suggested in this investigation results in maximum Adhesive bond strength of the titanium.Unmodified and surface modified titanium sheets by atmospheric pressure plasma were Adhesively bonded by High Temperature resistant polyimide Adhesive. The glass transition Temperature of this Adhesive is 310 C and these Adhesively bonded joints were cured at High Temperature. A substantial improvement in Adhesive bond strength was observed after atmospheric pressure plasma treatment. NOTICE: this is the author’s version of a work that was accepted for publication in International Journal of Adhesion & Adhesives. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in International Journal of Adhesion & Adhesives, 31 (7), 2011
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Atmospheric pressure plasma surface modification of titanium for High Temperature Adhesive bonding
International Journal of Adhesion and Adhesives, 2011Co-Authors: Mohammad Akram, Muhammad Akram, K.m.b. Jansen, L.j. Ernst, Shantanu Bhowmik, Showmik BhowmikAbstract:In this investigation surface treatment of titanium is carried out by plasma ion implantation under atmospheric pressure plasma in order to increase the Adhesive bond strength. Prior to the plasma treatment, titanium surfaces were mechanically treated by sand blasting. It is observed that the contact angle of de-ionized water decreases with the grit blast treatment time. Optical microscopy and scanning electron microscopic (SEM) analysis of untreated and atmospheric plasma treated titanium are carried out to examine the surface characteristics. A substantial improvement in the surface energy of titanium is observed after the atmospheric pressure plasma treatment. The surface energy increases with increasing exposure time of atmospheric pressure plasma. The optimized time of plasma treatment suggested in this investigation results in maximum Adhesive bond strength of the titanium. Unmodified and surface modified titanium sheets by atmospheric pressure plasma were Adhesively bonded by High Temperature resistant polyimide Adhesive. The glass transition Temperature of this Adhesive is 310 ??C and these Adhesively bonded joints were cured at High Temperature. A substantial improvement in Adhesive bond strength was observed after atmospheric pressure plasma treatment. ?? 2011 Elsevier Ltd. All rights reserved.