Anisotropic mechanical properties of thermoplastic elastomers in situ reinforced with thermotropic liquid-crystalline polymer fibers revealed by biaxial deformations
The anisotropic mechanical properties of the thermoplastic elastomer (TPE) in situ reinforced with thermotropic liquid-crystalline polymer (TLCP) fibers were investigated by uniaxial, strip-biaxial, and equibiaxial tensile measurements. The in situ composite sheets were prepared from an immiscible b...
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th-mahidol.164552018-06-21T15:35:33Z Anisotropic mechanical properties of thermoplastic elastomers in situ reinforced with thermotropic liquid-crystalline polymer fibers revealed by biaxial deformations S. Saikrasun S. Bualek-Limcharoen S. Kohjiya K. Urayama Mahasarakham University Mahidol University Kyoto University Chemistry Materials Science Physics and Astronomy The anisotropic mechanical properties of the thermoplastic elastomer (TPE) in situ reinforced with thermotropic liquid-crystalline polymer (TLCP) fibers were investigated by uniaxial, strip-biaxial, and equibiaxial tensile measurements. The in situ composite sheets were prepared from an immiscible blend of a TLCP, Rodrun LC3000, and a TPE, styrene-(ethylene butylene)-styrene (SEBS) triblock copolymer, by a melt extrusion process. The uniaxial orientation of the TLCP fibers in the TPE matrix generated during processing yielded a significant mechanical anisotropy in the composites. The biaxial tensile measurements clearly demonstrated the anisotropic mechanical properties of the composites: The modulus in the direction parallel to the machine direction (MD) was considerably higher than that in the transverse direction (TD), even at large deformations; in equibiaxial stretching, the yield strain in the MD was smaller than that in the TD; the composite containing 10 wt % of TLCP exhibited the highest mechanical anisotropy among the composites, with 0-30 wt % TLCP. The latter result was in accord with the SEM observation that the composite with 10 wt % of TLCP possessed the best fibrillar morphology and the highest degree of uniaxial orientation of the TLCP fibers. The yield strains in uni- and biaxial elongation for the composite containing 10 wt % of TLCP were almost the same as those for the neat styrene-ethylene butylene-styrene. The TLCP phase with good fibrillation did not appreciably alter the original yielding characteristics of the elastomer matrix. © 2004 Wiley Periodicals, Inc. 2018-06-21T08:12:39Z 2018-06-21T08:12:39Z 2005-01-15 Article Journal of Polymer Science, Part B: Polymer Physics. Vol.43, No.2 (2005), 135-144 10.1002/polb.20315 08876266 2-s2.0-12344288689 https://repository.li.mahidol.ac.th/handle/123456789/16455 Mahidol University SCOPUS https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=12344288689&origin=inward |
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Chemistry Materials Science Physics and Astronomy S. Saikrasun S. Bualek-Limcharoen S. Kohjiya K. Urayama Anisotropic mechanical properties of thermoplastic elastomers in situ reinforced with thermotropic liquid-crystalline polymer fibers revealed by biaxial deformations |
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The anisotropic mechanical properties of the thermoplastic elastomer (TPE) in situ reinforced with thermotropic liquid-crystalline polymer (TLCP) fibers were investigated by uniaxial, strip-biaxial, and equibiaxial tensile measurements. The in situ composite sheets were prepared from an immiscible blend of a TLCP, Rodrun LC3000, and a TPE, styrene-(ethylene butylene)-styrene (SEBS) triblock copolymer, by a melt extrusion process. The uniaxial orientation of the TLCP fibers in the TPE matrix generated during processing yielded a significant mechanical anisotropy in the composites. The biaxial tensile measurements clearly demonstrated the anisotropic mechanical properties of the composites: The modulus in the direction parallel to the machine direction (MD) was considerably higher than that in the transverse direction (TD), even at large deformations; in equibiaxial stretching, the yield strain in the MD was smaller than that in the TD; the composite containing 10 wt % of TLCP exhibited the highest mechanical anisotropy among the composites, with 0-30 wt % TLCP. The latter result was in accord with the SEM observation that the composite with 10 wt % of TLCP possessed the best fibrillar morphology and the highest degree of uniaxial orientation of the TLCP fibers. The yield strains in uni- and biaxial elongation for the composite containing 10 wt % of TLCP were almost the same as those for the neat styrene-ethylene butylene-styrene. The TLCP phase with good fibrillation did not appreciably alter the original yielding characteristics of the elastomer matrix. © 2004 Wiley Periodicals, Inc. |
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Mahasarakham University |
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Mahasarakham University S. Saikrasun S. Bualek-Limcharoen S. Kohjiya K. Urayama |
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Article |
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S. Saikrasun S. Bualek-Limcharoen S. Kohjiya K. Urayama |
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S. Saikrasun |
title |
Anisotropic mechanical properties of thermoplastic elastomers in situ reinforced with thermotropic liquid-crystalline polymer fibers revealed by biaxial deformations |
title_short |
Anisotropic mechanical properties of thermoplastic elastomers in situ reinforced with thermotropic liquid-crystalline polymer fibers revealed by biaxial deformations |
title_full |
Anisotropic mechanical properties of thermoplastic elastomers in situ reinforced with thermotropic liquid-crystalline polymer fibers revealed by biaxial deformations |
title_fullStr |
Anisotropic mechanical properties of thermoplastic elastomers in situ reinforced with thermotropic liquid-crystalline polymer fibers revealed by biaxial deformations |
title_full_unstemmed |
Anisotropic mechanical properties of thermoplastic elastomers in situ reinforced with thermotropic liquid-crystalline polymer fibers revealed by biaxial deformations |
title_sort |
anisotropic mechanical properties of thermoplastic elastomers in situ reinforced with thermotropic liquid-crystalline polymer fibers revealed by biaxial deformations |
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2018 |
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https://repository.li.mahidol.ac.th/handle/123456789/16455 |
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1763489083180449792 |