文献类型：期刊文献

英文题名：The nucleation effect of self-dispersed -nucleating agent in ethylene-propylene block copolymerized polypropylene

作者：Yang, Yaoding[1];Zhang, Wenxue[2];Qin, Wei[1];Xin, Zhong[1];Zhao, Shicheng[1];Chen, Lan[1];Zhou, Shuai[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]PetroChina, Lanzhou Petrochem Res Ctr, Lanzhou 730060, Gansu, Peoples R China

年份：2018

卷号：296

期号：10

起止页码：1627

外文期刊名：COLLOID AND POLYMER SCIENCE

收录：;EI(收录号：20183205677366);WOS:【SCI-EXPANDED(收录号:WOS:000443305300002)】；

基金：This work was supported by the National Key R&D Program of China (2016YFB0302201), National Natural Science Foundation of China (Grants 21476085 and 21606084), and the Fundamental Research Funds for the Central Universities (222201717025).

语种：英文

外文关键词：In situ; Self-dispersed; Nucleation efficiency; -Nucleating agent

摘要：The problem of agglomeration and poor dispersion results in the low nucleation efficiency of -nucleating agent (-NA) in polypropylene. In this paper, a self-dispersed -NA (Adi-Zn) was prepared in situ (IS) by adding adipic acid and zinc oxide at equimolar ratio in PPB powder during extrusion. The results showed that the nucleation efficiency of Adi-Zn (IS) was better than the direct addition of Adi-Zn. The impact strength of PPB nucleated with 0.05wt% Adi-Zn (IS) was 25% higher than that with the same additive amount of Adi-Zn. Also, the -crystal content (k value) almost reached 1. Crystallization temperature of PPB nucleated with Adi-Zn (IS) was slightly increased compared with that of Adi-Zn. The reaction mechanism of Adi-Zn (IS) was explored by Fourier transform infrared spectroscopy (FTIR). The results showed that adipic acid and zinc oxide generated zinc adipate, and zinc adipate acted as -NA during the crystallization of PPB. By means of energy dispersive X-ray (EDX) analysis and transmission electron microscopy (TEM), the reason for the good dispersion of in situ synthetic method was confirmed, which further leads to good nucleation efficiency of Adi-Zn (IS).