TY - GEN
T1 - Cryogenic dielectric and mechanical properties of nanowire-Al 2O3 filled PBT/GF composites
AU - Yu, Demei
AU - Xie, Yunchuan
AU - Wan, Weitao
AU - Guo, Xiusheng
AU - Xi, Yingxin
AU - Mao, Zhantong
AU - Huang, Longbiao
PY - 2006
Y1 - 2006
N2 - The cryogenic dielectric and mechanical properties of nanowire-Al 2O3 filled PBT/GF (glass fiber) composites are investigated by combing macro-performances testing and microstructures analysis. Compared with PBT/GF composites, the PBT/GF/Al2O3 ternary systems present improved tensile strength as well as impact strength. The fracture surface shows a typical toughened characteristic under SEM observation, which may be explained by the "crack bridging" toughening mechanism. At the same time, POM study indicates diminished spherulitic texture for the three phase composites, which is due to nucleating effect of the nanoparticles. DSC and WAXD analysis suggest that nanowire-Al2O3 can hinder the crystal growth and lower the degree of crystallinity. Cryogenic dielectric spectra of the composites showed a broad y loss process shifting to low temperature region with the increasing content of Al2O 3, which suggested that the existence of the nanowire might facilitate the molecular motions of PBT matrix and improved the low temperature toughness. Suitable amount of Al2O3 can also be helpful to reduce the micro-defects, which may contribute to the higher electrical strength of the systems.
AB - The cryogenic dielectric and mechanical properties of nanowire-Al 2O3 filled PBT/GF (glass fiber) composites are investigated by combing macro-performances testing and microstructures analysis. Compared with PBT/GF composites, the PBT/GF/Al2O3 ternary systems present improved tensile strength as well as impact strength. The fracture surface shows a typical toughened characteristic under SEM observation, which may be explained by the "crack bridging" toughening mechanism. At the same time, POM study indicates diminished spherulitic texture for the three phase composites, which is due to nucleating effect of the nanoparticles. DSC and WAXD analysis suggest that nanowire-Al2O3 can hinder the crystal growth and lower the degree of crystallinity. Cryogenic dielectric spectra of the composites showed a broad y loss process shifting to low temperature region with the increasing content of Al2O 3, which suggested that the existence of the nanowire might facilitate the molecular motions of PBT matrix and improved the low temperature toughness. Suitable amount of Al2O3 can also be helpful to reduce the micro-defects, which may contribute to the higher electrical strength of the systems.
KW - Composites
KW - Cryogenic
KW - Dielectric properties
KW - Mehcanical propeties
UR - https://www.scopus.com/pages/publications/46149099826
U2 - 10.1109/NEMS.2006.334725
DO - 10.1109/NEMS.2006.334725
M3 - 会议稿件
AN - SCOPUS:46149099826
SN - 1424401402
SN - 9781424401406
T3 - Proceedings of 1st IEEE International Conference on Nano Micro Engineered and Molecular Systems, 1st IEEE-NEMS
SP - 291
EP - 294
BT - Proceedings of 1st IEEE International Conference on Nano Micro Engineered and Molecular Systems, 1st IEEE-NEMS
T2 - 1st IEEE International Conference on Nano Micro Engineered and Molecular Systems, 1st IEEE-NEMS
Y2 - 18 January 2006 through 21 January 2006
ER -