The Experts below are selected from a list of 2763 Experts worldwide ranked by ideXlab platform
Satyendra Mishra - One of the best experts on this subject based on the ideXlab platform.
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Investigation of thermal and mechanical properties of styrene–butadiene Rubber Nanocomposites filled with SiO2–polystyrene core–shell nanoparticles:
Journal of Composite Materials, 2019Co-Authors: Mujahid Khan, D. Ratna, Satyendra Mishra, Shriram Sonawane, Navinchandra G. ShimpiAbstract:The present study investigates the effect of SiO2–polystyrene core–shell nanoparticles on properties of styrene–butadiene Rubber Nanocomposites. Meanwhile, SiO2–polystyrene core–shell nanoparticles...
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Effect of functionalized multi-walled carbon nanotubes on physicomechanical properties of silicone Rubber Nanocomposites:
Journal of Composite Materials, 2019Co-Authors: Milind Shashikant Tamore, Satyendra Mishra, D. Ratna, Navinchandra G. ShimpiAbstract:Ethyl-4-aminocinnamate functionalized multi-walled carbon nanotubes–reinforced silicone Rubber Nanocomposites were developed by means of compounding (two roll-mill) and molding (compression). Meanw...
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thermal mechanical and morphological properties of surface modified montmorillonite reinforced viton Rubber Nanocomposites
Polymer International, 2014Co-Authors: Ananda D. Mali, Navinchandra G. Shimpi, Satyendra MishraAbstract:Thermal, mechanical and morphological properties of surface-modified montmorillonite (OMMT)-reinforced Viton Rubber Nanocomposites were studied. The surface of montmorillonite was modified with a column chromatography technique using quaternary long-chain ammonium salt as an intercalant, which resulted in uniform exchange of ions between montmorillonite and the ion-exchange resin, and increased the d-spacing to 31.5 A. This improved d-spacing was due to the use of an ion-exchange column of sufficient length (35 cm) and diameter (5 cm) with maximum retention time for exchange of ions. The Viton Nanocomposites reinforced with OMMT (3–12 wt%) were prepared using a two-roll mill and moulded in a compression moulding machine. Tensile strength increased 3.17 times and elongation at break from 500 to 600% for 9 wt% loading of OMMT in comparison to pristine Viton Rubber. Thermogravimetric analysis revealed that the presence of OMMT greatly improved the thermal stability. This improvement in properties with increasing OMMT loading was due to insertion of Rubber chains between the OMMT plates with good wetting ability. Overall, at an optimum OMMT loading of 9 wt%, the properties of the Viton Rubber Nanocomposites improved, and subsequently worsened at 12 wt% due to agglomeration of OMMT as revealed by scanning electron microscopy and atomic force microscopy images. © 2013 Society of Chemical Industry
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Thermal, mechanical and morphological properties of surface‐modified montmorillonite‐reinforced Viton Rubber Nanocomposites
Polymer International, 2013Co-Authors: Ananda D. Mali, Navinchandra G. Shimpi, Satyendra MishraAbstract:Thermal, mechanical and morphological properties of surface-modified montmorillonite (OMMT)-reinforced Viton Rubber Nanocomposites were studied. The surface of montmorillonite was modified with a column chromatography technique using quaternary long-chain ammonium salt as an intercalant, which resulted in uniform exchange of ions between montmorillonite and the ion-exchange resin, and increased the d-spacing to 31.5 A. This improved d-spacing was due to the use of an ion-exchange column of sufficient length (35 cm) and diameter (5 cm) with maximum retention time for exchange of ions. The Viton Nanocomposites reinforced with OMMT (3–12 wt%) were prepared using a two-roll mill and moulded in a compression moulding machine. Tensile strength increased 3.17 times and elongation at break from 500 to 600% for 9 wt% loading of OMMT in comparison to pristine Viton Rubber. Thermogravimetric analysis revealed that the presence of OMMT greatly improved the thermal stability. This improvement in properties with increasing OMMT loading was due to insertion of Rubber chains between the OMMT plates with good wetting ability. Overall, at an optimum OMMT loading of 9 wt%, the properties of the Viton Rubber Nanocomposites improved, and subsequently worsened at 12 wt% due to agglomeration of OMMT as revealed by scanning electron microscopy and atomic force microscopy images. © 2013 Society of Chemical Industry
Liqun Zhang - One of the best experts on this subject based on the ideXlab platform.
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Construction of interconnected Al2O3 doped rGO network in natural Rubber Nanocomposites to achieve significant thermal conductivity and mechanical strength enhancement
Composites Science and Technology, 2020Co-Authors: Xiuying Zhao, Zhaoxu Zhang, Yue Xian, Yutao Lin, Liqun ZhangAbstract:Abstract Rubber promises to be an excellent matrix for heat dissipation composites due to its unique elasticity and flexibility. However, restricted by traditional processing approaches, it remains challenging to fabricate high-performance Rubber Nanocomposites with both good mechanical strength and high thermal conductivity (TC). Herein, we develop a novel GO-assisted gelation method to construct a 3D interconnected rGO@Al2O3 hybrid fillers network as efficient heat transfer path in natural Rubber nanocomposite acquiring desirable performance. The as-prepared Rubber nanocomposite, at a filler loading of 18.0 vol%, exhibits not only a largely increased tensile strength (25.6 MPa) but also a high TC (0.514 W/(m·K)). Owing to the construction of a highly interconnected filler network, the resulting 3D rGO@Al2O3-NR shows apparently higher TC than the Nanocomposites prepared by conventional method at the same filler content. More promisingly, the filler network tends to orient perpendicular to the compressing direction at ultrahigh filler loading, causing surprisingly enhanced in-plane TC which is up to 3.233 W/(m·K) at 33.9 vol% filler content. Moreover, we can easily control electrical resistance by adjusting the mass ratio of GO to Al2O3, making the Nanocomposites satisfy the use requirement of electrical insulation. This study provides a creative insight to the design of high-performance Rubber Nanocomposites with a bright application prospect in advanced heat dissipation materials.
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Quantitatively identify and understand the interphase of SiO2/Rubber Nanocomposites by using nanomechanical mapping technique of AFM
Composites Science and Technology, 2019Co-Authors: Chenchen Tian, Liqun Zhang, Guangyu Chu, Yuxing Feng, Chunmeng Miao, Nanying Ning, Ming TianAbstract:Abstract The interphase between nanofillers and Rubber matrix, also known as “bound Rubber (BR)” composed of a tightly BR (TBR) layer that strongly interacts with the filler and a loosely BR (LBR) layer that is physically adsorbed, plays an important role in the properties of Rubber Nanocomposites. Up to now, there is seldom direct evidence of such interfacial double layer structure and their thickness. In this study, we quantitatively identified the interphase of a representative nano silicon dioxide (SiO2)/Rubber composites by using peak force quantitative nanomechanical mapping (PFQNM) mode of Atomic Force Microscope (AFM). The thickness of interphase was quantitatively obtained, and the double layer structure of interphase was directly identified based on PFQNM images and the corresponding force-distance curves, and was further evidenced by high resolution transmission electron microscopy. We further studied the effect of molecular polarity on interphase of SiO2/hydrogenated nitrile butadiene Rubber (HNBR) composites. Interestingly, the molecular polarity of HNBR has almost no effect on the thickness of TBR layer but has a significant effect on the LBR layer, leading to the remarkable increase in the total interfacial thickness of the composites with increasing the acrylonitrile content. The mechanism for the formation of interfacial double layer structure of BR and the effect of molecular polarity on the double layer structure was discussed. This study provides a simple method to identify and deeply understand the double layer structure of the interphase, and thus provides guidance for the design of interphase for the preparation of high performance Rubber Nanocomposites.
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nitrile butadiene Rubber hindered phenol Nanocomposites with improved strength and high damping performance
Polymer, 2007Co-Authors: Xiuying Zhao, Ming Tian, Ping Xiang, Hao Fong, Riguang Jin, Liqun ZhangAbstract:A hindered phenol (AO-80) was studied to prepare Rubber Nanocomposites with nitrile butadiene Rubber (NBR). The NBR/AO-80 Rubber Nanocomposites were successfully developed by applying the adopted preparation procedure/conditions, especially by introducing mechanical kneading of the NBR/AO-80 composites at a temperature higher than the melting point of AO-80, followed by the crosslinking of NBR molecules during the subsequent hot-pressing/vulcanization process. The Nanocomposites consisted of two phases: (1) the AO-80 enriched phase (nanoparticles with the average size of approximately 20 nm) and (2) the NBR enriched phase (matrix). The generation and uniform distribution of the nanoparticles were attributed to the high temperature mechanical kneading process, the strong intermolecular interactions between AO-80 and NBR molecules, and the formation of a three-dimensional NBR network. The morphological, structural and mechanical properties of the composites were systematically investigated in each preparation step using SEM, TEM, DSC, XRD, FT-IR, DMTA and a tensile tester. The results indicated that the prepared NBR/AO-80 Rubber Nanocomposites had single relaxation transitions, improved tensile strengths, high dynamic mechanical loss values, and reasonably good stabilities. The NBR/AO-80 Rubber Nanocomposites are expected to have important applications as a high performance damping material.
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Structure and Properties of Novel Fibril Silicate/Rubber Nanocomposites
Polymer Journal, 2006Co-Authors: Ming Tian, Wenli Liang, Yonglai Lu, Lijun Cheng, Liqun ZhangAbstract:Palygorskite (AT) mineral was selected as a nano-fiber precursor due to its unique structure characteristics and surface chemical property, to construct a novel nano-fiber/Rubber Nanocomposites by using a simple and cost-efficient preparation method. Upon shear force during traditional mechanical mixing, the numerous nano-fibers contained in palygorskite micro-powder were released into Rubber matrix resulted from weak stacking force between nano-fibers and high shear stress associated with high viscosity of Rubber matrix. Meanwhile these nano-fibers were orientated along the shear direction the same as micro-short fiber. In situ modification using silane coupling agent can improve the dispersion of AT and strengthen the interfacial bonding between AT and Rubber. The result from dynamic mechanical thermal analysis shows that the incorporation of palygorskite into Rubber matrix markedly lowers the loss factor of Rubber in glassy transition region and increases storage modulus of Rubber. These Nanocomposites exhibit stress-strain characteristics that are similar to that of micro-short fiber reinforced Rubber, evident anisotropy in mechanical properties, good processing properties, as well as low cost and easily practiced by industry.
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The Anisotropy of Fibrillar Silicate/Rubber Nanocomposites
Macromolecular Materials and Engineering, 2005Co-Authors: Ming Tian, Wenli Liang, Lijun Cheng, Liqun ZhangAbstract:Fibrillar silicate (FS)/Rubber Nanocomposites were successfully prepared by directly mixing modified FS with Rubber matrix. It is found that FS could be separated into nano-fibrils with diameters less than 100 nm by the shear forces during mixing. The stress-strain characteristics of these composites are similar to those for short micro-fiber/ Rubber composites (SFRC). Nevertheless, these FS/Rubber composites have some outstanding advantages over the conventional SFRC, even though the reinforcing effect of FS is restricted due to its small shape aspect ratio. More importantly, the differences in mechanical properties of the composites in the two different directions show that SBR/ FS and NBR/FS composites both exhibit obvious anisotropy, which strongly depends on the preparation process, FS concentration, and Rubber matrix. These factors were thoroughly investigated in this paper, and it can be concluded that the anisotropy of the composites was due to the orientation of nano-fibrils.
Navinchandra G. Shimpi - One of the best experts on this subject based on the ideXlab platform.
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Investigation of thermal and mechanical properties of styrene–butadiene Rubber Nanocomposites filled with SiO2–polystyrene core–shell nanoparticles:
Journal of Composite Materials, 2019Co-Authors: Mujahid Khan, D. Ratna, Satyendra Mishra, Shriram Sonawane, Navinchandra G. ShimpiAbstract:The present study investigates the effect of SiO2–polystyrene core–shell nanoparticles on properties of styrene–butadiene Rubber Nanocomposites. Meanwhile, SiO2–polystyrene core–shell nanoparticles...
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Effect of functionalized multi-walled carbon nanotubes on physicomechanical properties of silicone Rubber Nanocomposites:
Journal of Composite Materials, 2019Co-Authors: Milind Shashikant Tamore, Satyendra Mishra, D. Ratna, Navinchandra G. ShimpiAbstract:Ethyl-4-aminocinnamate functionalized multi-walled carbon nanotubes–reinforced silicone Rubber Nanocomposites were developed by means of compounding (two roll-mill) and molding (compression). Meanw...
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thermal mechanical and morphological properties of surface modified montmorillonite reinforced viton Rubber Nanocomposites
Polymer International, 2014Co-Authors: Ananda D. Mali, Navinchandra G. Shimpi, Satyendra MishraAbstract:Thermal, mechanical and morphological properties of surface-modified montmorillonite (OMMT)-reinforced Viton Rubber Nanocomposites were studied. The surface of montmorillonite was modified with a column chromatography technique using quaternary long-chain ammonium salt as an intercalant, which resulted in uniform exchange of ions between montmorillonite and the ion-exchange resin, and increased the d-spacing to 31.5 A. This improved d-spacing was due to the use of an ion-exchange column of sufficient length (35 cm) and diameter (5 cm) with maximum retention time for exchange of ions. The Viton Nanocomposites reinforced with OMMT (3–12 wt%) were prepared using a two-roll mill and moulded in a compression moulding machine. Tensile strength increased 3.17 times and elongation at break from 500 to 600% for 9 wt% loading of OMMT in comparison to pristine Viton Rubber. Thermogravimetric analysis revealed that the presence of OMMT greatly improved the thermal stability. This improvement in properties with increasing OMMT loading was due to insertion of Rubber chains between the OMMT plates with good wetting ability. Overall, at an optimum OMMT loading of 9 wt%, the properties of the Viton Rubber Nanocomposites improved, and subsequently worsened at 12 wt% due to agglomeration of OMMT as revealed by scanning electron microscopy and atomic force microscopy images. © 2013 Society of Chemical Industry
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Thermal, mechanical and morphological properties of surface‐modified montmorillonite‐reinforced Viton Rubber Nanocomposites
Polymer International, 2013Co-Authors: Ananda D. Mali, Navinchandra G. Shimpi, Satyendra MishraAbstract:Thermal, mechanical and morphological properties of surface-modified montmorillonite (OMMT)-reinforced Viton Rubber Nanocomposites were studied. The surface of montmorillonite was modified with a column chromatography technique using quaternary long-chain ammonium salt as an intercalant, which resulted in uniform exchange of ions between montmorillonite and the ion-exchange resin, and increased the d-spacing to 31.5 A. This improved d-spacing was due to the use of an ion-exchange column of sufficient length (35 cm) and diameter (5 cm) with maximum retention time for exchange of ions. The Viton Nanocomposites reinforced with OMMT (3–12 wt%) were prepared using a two-roll mill and moulded in a compression moulding machine. Tensile strength increased 3.17 times and elongation at break from 500 to 600% for 9 wt% loading of OMMT in comparison to pristine Viton Rubber. Thermogravimetric analysis revealed that the presence of OMMT greatly improved the thermal stability. This improvement in properties with increasing OMMT loading was due to insertion of Rubber chains between the OMMT plates with good wetting ability. Overall, at an optimum OMMT loading of 9 wt%, the properties of the Viton Rubber Nanocomposites improved, and subsequently worsened at 12 wt% due to agglomeration of OMMT as revealed by scanning electron microscopy and atomic force microscopy images. © 2013 Society of Chemical Industry
Ananda D. Mali - One of the best experts on this subject based on the ideXlab platform.
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thermal mechanical and morphological properties of surface modified montmorillonite reinforced viton Rubber Nanocomposites
Polymer International, 2014Co-Authors: Ananda D. Mali, Navinchandra G. Shimpi, Satyendra MishraAbstract:Thermal, mechanical and morphological properties of surface-modified montmorillonite (OMMT)-reinforced Viton Rubber Nanocomposites were studied. The surface of montmorillonite was modified with a column chromatography technique using quaternary long-chain ammonium salt as an intercalant, which resulted in uniform exchange of ions between montmorillonite and the ion-exchange resin, and increased the d-spacing to 31.5 A. This improved d-spacing was due to the use of an ion-exchange column of sufficient length (35 cm) and diameter (5 cm) with maximum retention time for exchange of ions. The Viton Nanocomposites reinforced with OMMT (3–12 wt%) were prepared using a two-roll mill and moulded in a compression moulding machine. Tensile strength increased 3.17 times and elongation at break from 500 to 600% for 9 wt% loading of OMMT in comparison to pristine Viton Rubber. Thermogravimetric analysis revealed that the presence of OMMT greatly improved the thermal stability. This improvement in properties with increasing OMMT loading was due to insertion of Rubber chains between the OMMT plates with good wetting ability. Overall, at an optimum OMMT loading of 9 wt%, the properties of the Viton Rubber Nanocomposites improved, and subsequently worsened at 12 wt% due to agglomeration of OMMT as revealed by scanning electron microscopy and atomic force microscopy images. © 2013 Society of Chemical Industry
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Thermal, mechanical and morphological properties of surface‐modified montmorillonite‐reinforced Viton Rubber Nanocomposites
Polymer International, 2013Co-Authors: Ananda D. Mali, Navinchandra G. Shimpi, Satyendra MishraAbstract:Thermal, mechanical and morphological properties of surface-modified montmorillonite (OMMT)-reinforced Viton Rubber Nanocomposites were studied. The surface of montmorillonite was modified with a column chromatography technique using quaternary long-chain ammonium salt as an intercalant, which resulted in uniform exchange of ions between montmorillonite and the ion-exchange resin, and increased the d-spacing to 31.5 A. This improved d-spacing was due to the use of an ion-exchange column of sufficient length (35 cm) and diameter (5 cm) with maximum retention time for exchange of ions. The Viton Nanocomposites reinforced with OMMT (3–12 wt%) were prepared using a two-roll mill and moulded in a compression moulding machine. Tensile strength increased 3.17 times and elongation at break from 500 to 600% for 9 wt% loading of OMMT in comparison to pristine Viton Rubber. Thermogravimetric analysis revealed that the presence of OMMT greatly improved the thermal stability. This improvement in properties with increasing OMMT loading was due to insertion of Rubber chains between the OMMT plates with good wetting ability. Overall, at an optimum OMMT loading of 9 wt%, the properties of the Viton Rubber Nanocomposites improved, and subsequently worsened at 12 wt% due to agglomeration of OMMT as revealed by scanning electron microscopy and atomic force microscopy images. © 2013 Society of Chemical Industry
Ming Tian - One of the best experts on this subject based on the ideXlab platform.
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Quantitatively identify and understand the interphase of SiO2/Rubber Nanocomposites by using nanomechanical mapping technique of AFM
Composites Science and Technology, 2019Co-Authors: Chenchen Tian, Liqun Zhang, Guangyu Chu, Yuxing Feng, Chunmeng Miao, Nanying Ning, Ming TianAbstract:Abstract The interphase between nanofillers and Rubber matrix, also known as “bound Rubber (BR)” composed of a tightly BR (TBR) layer that strongly interacts with the filler and a loosely BR (LBR) layer that is physically adsorbed, plays an important role in the properties of Rubber Nanocomposites. Up to now, there is seldom direct evidence of such interfacial double layer structure and their thickness. In this study, we quantitatively identified the interphase of a representative nano silicon dioxide (SiO2)/Rubber composites by using peak force quantitative nanomechanical mapping (PFQNM) mode of Atomic Force Microscope (AFM). The thickness of interphase was quantitatively obtained, and the double layer structure of interphase was directly identified based on PFQNM images and the corresponding force-distance curves, and was further evidenced by high resolution transmission electron microscopy. We further studied the effect of molecular polarity on interphase of SiO2/hydrogenated nitrile butadiene Rubber (HNBR) composites. Interestingly, the molecular polarity of HNBR has almost no effect on the thickness of TBR layer but has a significant effect on the LBR layer, leading to the remarkable increase in the total interfacial thickness of the composites with increasing the acrylonitrile content. The mechanism for the formation of interfacial double layer structure of BR and the effect of molecular polarity on the double layer structure was discussed. This study provides a simple method to identify and deeply understand the double layer structure of the interphase, and thus provides guidance for the design of interphase for the preparation of high performance Rubber Nanocomposites.
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nitrile butadiene Rubber hindered phenol Nanocomposites with improved strength and high damping performance
Polymer, 2007Co-Authors: Xiuying Zhao, Ming Tian, Ping Xiang, Hao Fong, Riguang Jin, Liqun ZhangAbstract:A hindered phenol (AO-80) was studied to prepare Rubber Nanocomposites with nitrile butadiene Rubber (NBR). The NBR/AO-80 Rubber Nanocomposites were successfully developed by applying the adopted preparation procedure/conditions, especially by introducing mechanical kneading of the NBR/AO-80 composites at a temperature higher than the melting point of AO-80, followed by the crosslinking of NBR molecules during the subsequent hot-pressing/vulcanization process. The Nanocomposites consisted of two phases: (1) the AO-80 enriched phase (nanoparticles with the average size of approximately 20 nm) and (2) the NBR enriched phase (matrix). The generation and uniform distribution of the nanoparticles were attributed to the high temperature mechanical kneading process, the strong intermolecular interactions between AO-80 and NBR molecules, and the formation of a three-dimensional NBR network. The morphological, structural and mechanical properties of the composites were systematically investigated in each preparation step using SEM, TEM, DSC, XRD, FT-IR, DMTA and a tensile tester. The results indicated that the prepared NBR/AO-80 Rubber Nanocomposites had single relaxation transitions, improved tensile strengths, high dynamic mechanical loss values, and reasonably good stabilities. The NBR/AO-80 Rubber Nanocomposites are expected to have important applications as a high performance damping material.
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Structure and Properties of Novel Fibril Silicate/Rubber Nanocomposites
Polymer Journal, 2006Co-Authors: Ming Tian, Wenli Liang, Yonglai Lu, Lijun Cheng, Liqun ZhangAbstract:Palygorskite (AT) mineral was selected as a nano-fiber precursor due to its unique structure characteristics and surface chemical property, to construct a novel nano-fiber/Rubber Nanocomposites by using a simple and cost-efficient preparation method. Upon shear force during traditional mechanical mixing, the numerous nano-fibers contained in palygorskite micro-powder were released into Rubber matrix resulted from weak stacking force between nano-fibers and high shear stress associated with high viscosity of Rubber matrix. Meanwhile these nano-fibers were orientated along the shear direction the same as micro-short fiber. In situ modification using silane coupling agent can improve the dispersion of AT and strengthen the interfacial bonding between AT and Rubber. The result from dynamic mechanical thermal analysis shows that the incorporation of palygorskite into Rubber matrix markedly lowers the loss factor of Rubber in glassy transition region and increases storage modulus of Rubber. These Nanocomposites exhibit stress-strain characteristics that are similar to that of micro-short fiber reinforced Rubber, evident anisotropy in mechanical properties, good processing properties, as well as low cost and easily practiced by industry.
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The Anisotropy of Fibrillar Silicate/Rubber Nanocomposites
Macromolecular Materials and Engineering, 2005Co-Authors: Ming Tian, Wenli Liang, Lijun Cheng, Liqun ZhangAbstract:Fibrillar silicate (FS)/Rubber Nanocomposites were successfully prepared by directly mixing modified FS with Rubber matrix. It is found that FS could be separated into nano-fibrils with diameters less than 100 nm by the shear forces during mixing. The stress-strain characteristics of these composites are similar to those for short micro-fiber/ Rubber composites (SFRC). Nevertheless, these FS/Rubber composites have some outstanding advantages over the conventional SFRC, even though the reinforcing effect of FS is restricted due to its small shape aspect ratio. More importantly, the differences in mechanical properties of the composites in the two different directions show that SBR/ FS and NBR/FS composites both exhibit obvious anisotropy, which strongly depends on the preparation process, FS concentration, and Rubber matrix. These factors were thoroughly investigated in this paper, and it can be concluded that the anisotropy of the composites was due to the orientation of nano-fibrils.
