文献类型：期刊文献

英文题名：Study on variable nucleation efficiency of N,N-Dicyclohexyl-2,6-naphthalenedicarboxamide on isotactic polypropylene

作者：Shi, Yaoqi[1,2];Xin, Zhong[2]

机构：[1]Shanghai Res Inst Chem Ind, Shanghai Key Lab Catalysis Technol Polyolefin, Shanghai, Peoples R China;[2]East China Univ Sci & Technol, Coll Chem Engn, State Key Lab Chem Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2016

卷号：29

期号：12

起止页码：1667

外文期刊名：JOURNAL OF THERMOPLASTIC COMPOSITE MATERIALS

收录：;EI(收录号：20165103137623);WOS:【SCI-EXPANDED(收录号:WOS:000390559000006)】；

基金：The author(s) disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: The authors thank the National Natural Science Funds of China (U1162110, 21306047), the Program of Shanghai Subject Chief Scientist (10XD1401500), General Financial Grant for China Postdoctoral Science Foundation (2013M541489), and the Fundamental Research Funds for the central universities of China (WA1013012, WA1314051) for financial support.

语种：英文

外文关键词：Isotactic polypropylene; crystallization; nucleating agents; variable nucleating efficiency; differential scanning calorimetry

摘要：N,N-Dicyclohexyl-2,6-naphthalenedicarboxamide (NU100), a commercial -nucleating agent (NA) for isotactic polypropylene (iPP), is found dissolvable in iPP melt. Various heating temperatures (T(h)s) of iPP/NU100 cause different solubilities of NA, resulting in various aggregation morphologies of NU100 in the melt. Moreover, nucleation efficiency of NA NU100 on iPP changes with the T-h of iPP/NU100. In this article, the effects of T-h on nucleation behaviors of iPP nucleated with different concentrations of NU100 were systematically studied. The results indicated nucleation efficiency of NU100 depended not only on concentration of NA but also on T-h of nucleated iPP. With the increase of T-h, crystallization peak temperature (T-cp) of nucleated iPP decreased remarkably. The whole process that T-cp shifted from 126.8 degrees C to 120.8 degrees C was obtained by investigating the nucleation behavior of iPP/0.1 wt% NU100. Polarized optical microscopy observation confirmed lower T-cp, representing the crystallization of iPP nucleated by dissolved-recrystallized NA NU100. Further, diverse aggregation morphologies of NA in iPP melt during crystallization were observed. A schematic diagram was proposed illustrating the morphologies formed during recrystallization process of NU100 melted at different T(h)s.