The Experts below are selected from a list of 246 Experts worldwide ranked by ideXlab platform
M. Mercedes Pastor-blas - One of the best experts on this subject based on the ideXlab platform.
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Influence of Chlorinating Solution Concentration on the Interactions Produced Between Chlorinated Thermoplastic Rubber and Polyurethane Adhesive at the Interface
Journal of Adhesion, 2010Co-Authors: M. Mercedes Pastor-blas, José Miguel Martín-martínez, F. J. BoerioAbstract:Chlorination of a Thermoplastic styrene-butadiene-styrene Rubber (S0) with different amounts of trichloroisocyanuric acid (TCI) solutions in ethyl acetate improved its adhesion to polyurethane adhesives. A strong interaction of the PU (polyurethane) adhesive and the chlorinated S0 Rubber chains is produced at the interface. The increase in the concentration of TCI from 0.5 wt% up to 2-7 wt% resulted in the deposition of crystallites of unreacted TCI on the Rubber surface. The remaining TCI on the Rubber surface migrates through the PU adhesive producing some chlorination of the PU chains. The failure of the joint is located in this interface composed of both chlorinated S0 Rubber and partially-chlorinated PU adhesive.
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COMPATIBILITY IMPROVEMENT BETWEEN CHLORINATED Thermoplastic Rubber AND POLYCHLOROPRENE ADHESIVE
Rubber Chemistry and Technology, 2009Co-Authors: M. Mercedes Pastor-blasAbstract:Traditionally, it has been believed that there is an incompatibility between the chlorinated Rubber surface and polychloroprene adhesives resulting in a lack of adhesion. However, in this study it has been shown that a polychloroprene adhesive (PCP30P) produces similar T-peel strength values when using a polyurethane (PU) adhesive in joints produced between a chlorinated Thermoplastic SBS Rubber and roughened leather. In both cases a cohesive failure mode within the Rubber was obtained. This polychloroprene adhesive (PCP30P) contains a thermoreactive phenolic resin in its formulation. The nature of the resin greatly influences the viscoelastic properties of the polychloroprene adhesive. Thus, polychloroprene adhesive with no resin or with resins of a different nature do not produce suitable adhesive joints between the chlorinated Rubber and the leather (Terpene phenolic resin (PCP30TP), a glycerol esther colofony resin (PCP30EC) and an aromatic hydrocarbon resin (PCP30AH) were studied). The interactions produced between the chlorinating agent and the adhesive were studied by ATR-IR on solid films of the polychloroprene adhesives and the tackifier resins previously immersed in the chlorinating solution (0.5 and 3 wt% TCI/MEK). All the polychloroprene adhesives were modified by the chlorinating agent, being capable of producing a good interaction with the chlorinated Rubber surface at the interface. Therefore, the good performance of the PCP30P adhesive compared with the other polychloroprene adhesives has been ascribed to rheological behavior more similar to the PU adhesive assessed by DMTA. The PCP30P adhesive is the most elastic material among all the considered polychloroprene adhesives. This increased elasticity and better viscoelastic properties are imparted by the thermoreactive phe- nolic resin in its formulation.
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Migration of Processing Oils of Thermoplastic Rubber Treated with RF Plasma
Plasma Chemistry and Plasma Processing, 2008Co-Authors: Ana B. Ortíz-magán, M. Mercedes Pastor-blasAbstract:The surface modifications produced by a RF plasma treatment on a Thermoplastic styrene–butadiene–styrene Rubber–SBS—with a considerable amount of processing oils in its formulation (TRO) have been studied and compared to the modifications produced on an oil-free SBS Rubber (TRF). The modifications produced by the plasmas on the Rubber surface depended on the nature of the gas used to generate the plasma. Thus, argon plasma favored the migration of processing oils to the TRO Rubber surface, producing a weak oily layer that prevented interaction of Rubber with a polyurethane adhesive. On the other hand, oxygen and carbon dioxide plasmas produced important ablation of the Rubber surface which resulted in a partial (CO_2 plasma) or total (O_2 plasma) removal of processing oils from the Rubber surface and the creation of polar moieties that increased adhesion of the Rubber surface towards a polyurethane adhesive.
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Interactions at the interface between Thermoplastic Rubber and polychloroprene adhesive
Surface and Interface Analysis, 2008Co-Authors: M. Virtudes Navarro-bañón, M. Mercedes Pastor-blas, José Miguel Martín-martínezAbstract:The interface produced between a chlorinated Thermoplastic styrene-butadiene-styrene Rubber and a polychloroprene (PCP) adhesive has been studied and compared to the interface produced using a polyurethane (PU) adhesive. Chlorination of the Rubber was produced by spin coating solutions of trichloroisocyanuric acid in methyl ethyl ketone. The adhesive solution was spin coated on to the chlorinated Rubber and the interface between the chlorinated Rubber and the adhesive was analyzed by infrared spectroscopy. Chlorination of the Rubber produces cross-linking of the outermost chlorinated and oxidized Rubber surface, which becomes insoluble in toluene. The chlorinated Rubber chains are able to migrate through the chlorinated Rubber/adhesive interface and produce a cross-linked interface. Similar interfaces are obtained with PU or PCP adhesive. However it is the addition of a thermoreactive phenolic tackifier resin to the PCP adhesive, which imparts appropriate rheological properties to the PCP adhesive, responsible for the increased adhesion properties. Copyright © 2008 John Wiley & Sons, Ltd.
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Mechanisms of Adhesion in Surface Chlorinated Thermoplastic Rubber/Thermoplastic Polyurethane Adhesive Joints
Rubber Chemistry and Technology, 2002Co-Authors: M. Mercedes Pastor-blas, José Miguel Martín-martínez, F. J. BoerioAbstract:Abstract Chlorination of a Thermoplastic styrene-butadiene-styrene Rubber (S0) with a solution of 2 wt% trichloroisocyanuric acid (TCI) in ethyl acetate improved its adhesion to polyurethane adhesives. The analysis of the failed surfaces (obtained after T-peel test of S0/PU joints) showed that the locus of failure in the Rubber/polyurethane joints progresses from adhesion (in non chlorinated-S0/PU joint) to cohesion in the chlorinated layer (for chlorinated-S0/PU joint). The composition of this chlorinated layer differed from the composition of the non bonded-chlorinated Rubber, i.e. the failure of the joint was located in a chlorinated layer with a distinctive chemistry. On the other hand, the analysis of the chlorinated Rubber/PU adhesive interface showed that chlorination with TCI produces a crosslinking of the Rubber surface as well as strong interactions between the uppermost-chlorinated layer and the PU adhesive.
Qonita Larasati Roesanto - One of the best experts on this subject based on the ideXlab platform.
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Pengaplikasian Material Thermoplastic Rubber sebagai Produk Aksesoris Fesyen
Universitas Telkom, 2019Co-Authors: Qonita Larasati RoesantoAbstract:Pakaian dan aksesoris tidak terlepas dari kehidupan manusia. Selain kebutuhan akan pakaian, kebutuhan terhadap aksesoris fesyen pun tidak kalah penting. Aksesoris fesyen dapat meningkatkan nilai estetika bagi yang menggunakannya. Di Indonesia saat ini kaum hawa sedang menggandrungi aksesoris fesyen terutama perhiasan yang modern, unik dan bisa membuat mereka bangga dengan memakai produk tersebut. Hal ini menyebabkan para desainer berlomba-lomba untuk menghasilkan produk dengan bentuk dan material yang tidak biasa untuk digunakan dalam produk konvensional. Salah satu material yang dapat berpotensi menjadi perhiasan yang unik dan modern adalah Thermoplastic Rubber. Metode penelitian yang digunakan adalah studi literatur, observasi dan wawancara kepada pihak yang berkaitan dengan material termoplastik Rubber. Penelitian dalam tugas akhir ini dilakukan untuk menjadikan termoplastik Rubber sebagai material yang mempunyai aspek visual dan fungsi yang lebih sebagai produk aksesoris fesyen. Penelitian pada tugas akhir ini difokuskan pada pengembangan motif, tekstur, teknik, modul dan desain pada material termoplastik Rubber yang akan menjadi produk aksesoris fesyen. Kata kunci: termoplastik Rubber, aksesoris unik, aksesoris fesye
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PENGAPLIKASIAN MATERIAL Thermoplastic Rubber SEBAGAI PRODUK AKSESORIS FESYEN
2018Co-Authors: Qonita Larasati Roesanto, Fajar CiptandiAbstract:Besides fashion apparel, fashion accessories are also essential in human life since they can promote the aesthetic quality of the wearer. Today, Indonesian women are fond of them, especially modern and unique accessories that give them pride. This causes a competition among designers to create extraordinary products in terms of shapes and materials to be used in conventional products. One of the materials that is potential to be made into modern and unique accessories is Thermoplastic Rubber. This research aims to reveal the potential of Thermoplastic Rubber as an alternative material with better visual and function elements for fashion accessories. Literature study, observation and interviews are conducted in this research. It focuses on developing motifs, textures, techniques, modules and designs on Thermoplastic Rubber materials to be products of fashion accessories. Keywords : Thermoplastic Rubber, Unique Accessories, Fashion Accessories _______________________________________________________________ Selain kebutuhan akan pakaian, kebutuhan terhadap aksesoris fesyen pun tidak kalah penting. Aksesoris fesyen dapat meningkatkan nilai estetika bagi yang menggunakannya. Di Indonesia saat ini kaum hawa sedang menggandrungi aksesoris fesyen terutama perhiasan yang modern, unik dan bisa membuat mereka bangga dengan memakai produk tersebut. Hal ini menyebabkan para desainer berlomba-lomba untuk menghasilkan produk dengan bentuk dan material yang tidak biasa untuk digunakan dalam produk konvensional. Salah satu material yang dapat berpotensi menjadi perhiasan yang unik dan modern adalah Thermoplastic Rubber . Metode penelitian yang digunakan adalah studi literatur, observasi dan wawancara kepada pihak yang berkaitan dengan material termoplastik Rubber . Penelitian dalam tugas akhir ini dilakukan untuk menjadikan termoplastik Rubber sebagai material yang mempunyai aspek visual dan fungsi yang lebih sebagai produk aksesoris fesyen. Penelitian pada tugas akhir ini difokuskan pada pengembangan motif, tekstur, teknik, modul dan desain pada material termoplastik Rubber yang akan menjadi produk aksesoris fesyen. Kata Kunci : Termoplastik Rubber, Aksesoris Unik, Aksesoris Fesyen
Tairong Kuang - One of the best experts on this subject based on the ideXlab platform.
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morphological structure rheological behavior mechanical properties and sound insulation performance of Thermoplastic Rubber composites reinforced by different inorganic fillers
Polymers, 2018Co-Authors: Wei Fang, Mingqiang Zhong, Jingtao Yang, Feng Chen, Tairong KuangAbstract:The application area of a sound insulation material is highly dependent on the technology adopted for its processing. In this study, Thermoplastic Rubber (TPR, polypropylene/ethylene propylene diene monomer) composites were simply prepared via an extrusion method. Two microscale particles, CaCO3 and hollow glass microspheres (HGW) were chosen to not only enhance the sound insulation but also reinforced the mechanical properties. Meanwhile, the processing capability of composites was confirmed. SEM images showed that the CaCO3 was uniformly dispersed in TPR matrix with ~3 μm scale aggregates, while the HGM was slightly aggregated to ~13 μm scale. The heterogeneous dispersion of micro-scale fillers strongly affected the sound transmission loss (STL) value of composites. The STL values of TPR composites with 40 wt % CaCO3 and 20 wt % HGM composites were about 12 dB and 7 dB higher than that of pure TPR sample, respectively. The improved sound insulation performances of the composites have been attributed to the enhanced reflection and dissipate sound energy in the heterogeneous composite. Moreover, the mechanical properties were also enhanced. The discontinued sound impedance and reinforced stiffness were considered as crucial for the sound insulation.
Atsuo Takanishi - One of the best experts on this subject based on the ideXlab platform.
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IROS - Development of a talking robot with vocal cords and lips having human-like biological structures
2005 IEEE RSJ International Conference on Intelligent Robots and Systems, 2005Co-Authors: Kotaro Fukui, Kazufumi Nishikawa, Shunsuke Ikeo, Eiji Shintaku, Kentaro Takada, Hideaki Takanobu, Masaaki Honda, Atsuo TakanishiAbstract:We have developed a new talking robot, WT-5 (Waseda Talker No. 5), having novel vocal cords and lips based on human biological structures. The vocal cords are made from the Thermoplastic Rubber "Septon", available from Kuraray Co. Ltd, which has a similar elasticity to human tissue. The vocal cord model was constructed with a similar structure to the biological structure of the human vocal cords. The vocal cords vibrated like those of a human. The new lips were able to attain a large deformation in a similar manner to human lips, without the leakage of air. This allowed clear pronunciation of vowels. With these new mechanisms, the robot could reproduce human speech in a more biological manner and could produce voices closer to those of a human.
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KES (3) - Development of a new vocal cords based on human biological structures for talking robot
Lecture Notes in Computer Science, 2005Co-Authors: Kotaro Fukui, Kazufumi Nishikawa, Shunsuke Ikeo, Eiji Shintaku, Kentaro Takada, Hideaki Takanobu, Masaaki Honda, Atsuo TakanishiAbstract:We developed a new talking robot, WT-5 (Waseda Talker No. 5), having novel vocal cords, based on human biological structures. The vocal cords were made from the Thermoplastic Rubber “Septon”, available from Kuraray Co. Ltd. Septon has a similar elasticity to human tissue. The vocal cord model to have a structure similar to the biological structure of the human vocal cords was made. The vocal cords were vibrated like those of a human. This made clean the robot's vowels. With these new mechanisms, the robot could reproduce the human speech in a more biological view and could produce voices nearer to those of a human.
Wei Fang - One of the best experts on this subject based on the ideXlab platform.
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morphological structure rheological behavior mechanical properties and sound insulation performance of Thermoplastic Rubber composites reinforced by different inorganic fillers
Polymers, 2018Co-Authors: Wei Fang, Mingqiang Zhong, Jingtao Yang, Feng Chen, Tairong KuangAbstract:The application area of a sound insulation material is highly dependent on the technology adopted for its processing. In this study, Thermoplastic Rubber (TPR, polypropylene/ethylene propylene diene monomer) composites were simply prepared via an extrusion method. Two microscale particles, CaCO3 and hollow glass microspheres (HGW) were chosen to not only enhance the sound insulation but also reinforced the mechanical properties. Meanwhile, the processing capability of composites was confirmed. SEM images showed that the CaCO3 was uniformly dispersed in TPR matrix with ~3 μm scale aggregates, while the HGM was slightly aggregated to ~13 μm scale. The heterogeneous dispersion of micro-scale fillers strongly affected the sound transmission loss (STL) value of composites. The STL values of TPR composites with 40 wt % CaCO3 and 20 wt % HGM composites were about 12 dB and 7 dB higher than that of pure TPR sample, respectively. The improved sound insulation performances of the composites have been attributed to the enhanced reflection and dissipate sound energy in the heterogeneous composite. Moreover, the mechanical properties were also enhanced. The discontinued sound impedance and reinforced stiffness were considered as crucial for the sound insulation.