Citation: Xiu-qin Zhang, Qian Xing, Rong-bo Li, Rui Wang, Du-jin Wang. DEFORMATION INVESTIGATION ON emPP/SiO2 COMPOSITES: INFLUENCE OF STRETCHING TEMPERATURE AND PARTICLE SIZE ON MORPHOLOGY EVOLUTION AND CRYSTALLINE STRUCTURE OF THIN FILMS[J]. Chinese Journal of Polymer Science, ;2013, 31(2): 275-284. doi: 10.1007/s10118-013-1206-y shu

DEFORMATION INVESTIGATION ON emPP/SiO2 COMPOSITES: INFLUENCE OF STRETCHING TEMPERATURE AND PARTICLE SIZE ON MORPHOLOGY EVOLUTION AND CRYSTALLINE STRUCTURE OF THIN FILMS

Received Date: 19 March 2012
Revised Date: 29 April 2012

Fund Project: The work was financially supported by the National Natural Science Foundation of China (Nos. 51073004 and 21074141) and the China National Funds for Distinguished Young Scientists (No. 50925313).

In the present work, structure changes during stretching of isotactic polypropylene (emPP) and emPP/silicon dioxide (SiO2) composites have been investigated systematically. The -form crystal structure of both iPP and emPP/SiO2 composites is destroyed and transforms into the mesophase as the samples are stretched at a low temperature (35℃), while stretching at high temperatures (90℃ and 120℃) can restrain the appearance of defects and keep the perfection of crystal structure. FTIR results reveal that the stretching temperatures show no obvious difference of the effect on the orientation of pure iPP, however, the orientation of emPP/SiO2 composites is greatly changed by the tensile temperature. In the case of micron-sized SiO2 particles (average particle diameter d1 m), the orientation of the composites is lower than that of pure iPP at all stretching temperatures. The above results suggest that the stretching temperature and the SiO2 particle size have great influence on the structure variation and orientation behavior of emPP/SiO2 composites.
- iPP/SiO2 composites
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