文献类型：期刊文献

英文题名：The mechanical properties, crystallization and rheological behavior of isotactic polypropylene with nucleating agent supported on polyhedral oligomeric silsesquioxanes (POSS)

作者：Zhang, Xian[1];Zhao, Shicheng[1];Meng, Xin[1];Xin, Zhong[1]

机构：[1]East China Univ Sci & Technol, Shanghai Key Lab Multiphase Mat Chem Engn, Dept Prod Engn, Shanghai 200237, Peoples R China

年份：2020

卷号：27

期号：10

外文期刊名：JOURNAL OF POLYMER RESEARCH

收录：;EI(收录号：20203809209891);WOS:【SCI-EXPANDED(收录号:WOS:000569871600001)】；

基金：This work was financially supported by National Natural Science Foundation of China (Grants 21878089 and 21606084), the National Key R&D Program of China (2016YFB0302201), the Fundamental Research Funds for the Central Universities (22221818010) and the National Natural Science Funds of China (Grant No. 21776079).

语种：英文

外文关键词：Polyhedral oligomeric silsesquioxanes; Isotactic polypropylene; Supported-nucleating agent; Nucleating efficiency

摘要：The influence of the nucleating agent that supported on polyhedral oligomeric silsesquioxanes (supported NA) on the properties of iPP was investigated in detail. It was found that the supported NA have higher nucleating efficiency than the original NA powder in the iPP system. The flexural modulus of iPP increased by 11.6% with 0.04 wt.% original NA powder and increased by 20.5% when supported NA added. The sizes of supported NA were investigated by scanning electron microscope (SEM) coupled with energy dispersive spectrometer (EDS). The crystal structure and morphology of the iPP samples was studied using wide-angle X-ray diffraction (WAXD) and polarized optical microscope (POM), respectively. The nucleating efficiency of supported NA and the dry mix of NA and POSS was also analyzed. The non-isothermal crystallization behaviors were analyzed using Mo's model. Besides, the sample with supported NA exhibited lower complex viscosity (eta*) values, indicting supported NA can act as a lubricant in system. A possible crystallization mechanism of supported NA in the iPP was proposed.