Influence of microstructure on space charges of polypropylene
作者： Xiang Li , Qiangguo Du , Jie Kang , Demin Tu
DOI: 10.1002/POLB.10100
关键词: Thermal 、 Polymer chemistry 、 Amorphous solid 、 Annealing (metallurgy) 、 Isothermal process 、 Microstructure 、 Polypropylene 、 Materials science 、 Space charge 、 Copolymer 、 Thermodynamics
摘要: The correlation of chemical structure, crystalline morphology, and space charge distribution under a dc electrical field was investigated with three kinds poly(propylene) (PP) different that is, homogeneous PP block copolymer random PP. the samples prominently affected by their sequence structure microstructure. Among PPs, all isothermally crystallized at 140 °C, sample coPP represents most well proportional smallest number charges. effect thermal history on also coPP. thermally treated 50 °C clearly better than higher temperature 100 °C. Subsequent experiments indicate attributes to imperfect fine sperulites “amorphous” region. originate from incorporation ethylene segments or units into chains low annealing temperature, play an important role in formation shallow traps transportation © 2002 John Wiley & Sons, Inc. J Polym Sci Part B: Phys 40: 365–374, 2002; DOI 10.1002/polb.10100
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