文献类型：期刊文献

英文题名：Crystallization behaviors of poly(ethylene terephthalate) (PET) with monosilane isobutyl-polyhedral oligomeric silsesquioxanes (POSS)

作者：Zhang, Xian[1];Zhao, Shicheng[1];Mohamed, Mohamed Gamal[2];Kuo, Shiao-Wei[2];Xin, Zhong[1]

机构：[1]East China Univ Sci & Technol, Dept Prod Engn, Shanghai Key Lab Multiphase Mat Chem Engn, Shanghai 200237, Peoples R China;[2]Natl Sun Yat Sen Univ, Dept Mat & Optoelect Sci, Kaohsiung 804, Taiwan

年份：2020

卷号：55

期号：29

起止页码：14642

外文期刊名：JOURNAL OF MATERIALS SCIENCE

收录：;EI(收录号：20202908942157);WOS:【SCI-EXPANDED(收录号:WOS:000548167400012)】；

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：High resolution transmission electron microscopy - Crystallization kinetics - Oligomers - Polyethylene terephthalates - Ethylene - Isotherms - Crystallinity - Nucleation

摘要：The crystallization behaviors of poly(ethylene terephthalate) (PET) with monosilane isobutyl-polyhedral oligomeric silsesquioxanes (POSS) were investigated in detail. It is observed that POSS acts as an effective nucleating agent under appropriate concentration in the PET system. Polarized optical microscopy (POM) results showed that POSS improved the nucleation density of PET. Besides, the transmission electron microscopy (TEM) observation demonstrated POSS dispersed mostly at the nanometer scale throughout the PET matrix. The crystal structures of POSS and PET/POSS were analyzed using wide-angle X-ray diffraction (WAXD). Moreover, non-isothermal crystallization kinetics of PET and PET/POSS were studied using Mo's method. The PET/POSS system demonstrated the lower value of F(T) than pure PET, indicating that the lower cooling rate was required to attain a specified relative crystallinity for the system. The comparison of the crystallization activation energy (Delta E) showed that the POSS nanoparticles improved the crystallization of PET through an acceleration of the nucleation process. Furthermore, the isothermal crystallization behaviors were also investigated using classic Avrami method. Overall, POSS can act as a nucleating agent and greatly improve the crystallization of PET through accelerating the nucleation process. [GRAPHICS] .