文献类型：期刊文献

英文题名：Increased nucleation efficiency of an in situ-formed β-nucleating agent for impact polypropylene copolymer

作者：Chen, Lan[1];Yang, Yaoding[1];Xin, Zhong[1];Qin, Wei[1];Zhou, Shuai[1];Zhao, Shicheng[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：2019

卷号：26

期号：10

外文期刊名：JOURNAL OF POLYMER RESEARCH

收录：;EI(收录号：20193707435586);WOS:【SCI-EXPANDED(收录号:WOS:000485869400001)】；

基金：This work was financially supported by the National Natural Science Foundation of China (Grants 21878089 and 21606084), National Key R&D Program of China (2016YFB0302201) and the Fundamental Research Funds for the Central Universities (22221818010).

语种：英文

外文关键词：beta-Nucleating agent; Zinc adipate; Crystallization; Dispersion; Polypropylene

摘要：In this study we generated zinc adipate (ZnAA) in situ [referred to herein as "ZnAA(IS)"] through the addition of its reaction precursors-adipic acid and zinc oxide-during the extrusion of impact polypropylene copolymer (IPC); we then investigated its nucleation performance as beta nucleating agent using differential scanning calorimetry, polarized optical microscopy, wide-angle X-ray diffraction, and tests of mechanical properties. When compared with the pre-addition of ZnAA, the generation of ZnAA(IS) in situ resulted in higher nucleation effect toward the IPC, due to the smaller average particle size and more uniform dispersion of ZnAA(IS). In particular, compared with the neat IPC, the impact strength of the IPC prepared using 0.1 wt% of ZnAA(IS) increased by 103% at low temperature (-20 degrees C), whereas that of the IPC prepared with ZnAA increased by 38.9% under the same conditions. Moreover, when using Flash DSC to examine the crystallization behavior of the IPC under rapid cooling, we observed that, upon increasing the cooling rate, two crystalline peaks appeared for the neat and nucleated IPCs, presumably because of the crystallization of both the PP and PE homopolymers.