文献类型：期刊文献

英文题名：Controllable Crystallization Behavior of Nylon-6/66 Copolymers Based on Regulating Sequence Distribution

作者：Tang, Jie[1];Xu, Bowen[1];Xi, Zhenhao[1];Pan, Xun[2];Zhao, Ling[1]

机构：[1]East China Univ Sci & Technol, Shanghai Key Lab Multiphase Mat Chem Engn, Shanghai 200237, Peoples R China;[2]Flinders Univ S Australia, Flinders Inst NanoScale Sci & Technol, Sturt Rd, Bedford Pk, SA 5042, Australia

年份：2018

卷号：57

期号：44

起止页码：15008

外文期刊名：INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH

收录：;EI(收录号：20184606064785);WOS:【SCI-EXPANDED(收录号:WOS:000449888200015)】；

基金：The authors gratefully acknowledge support from the National Key Research and Development Program of China [Grant No. 2016YFB303001], the National Natural Science Foundation of China [Grant No. 21676083], the Shanghai Rising-Star Program [Grant No. 16QB140130], the Fundamental Research Funds for the Central Universities [Grant No. 22221818010], and the 111 project [Grant No. B08021].

语种：英文

外文关键词：Crystallization - Morphology - Rayon - Polyamides - Activation energy

摘要：Based on retaining the excellent properties of nylon-6 (PA6), nylon-6/66 copolymers (PA6/66) with well-controlled dimensional stability and toughness exhibit more potential applications. In this work, PA6/66 random copolymers were synthesized by melt copolymerization of epsilon-caprolactam and hexamethylene adipamide salt. The sequence distribution, crystal morphology, crystal forms, and melting and crystallization behavior of PA6/66 copolymers were systematically investigated by quantitative C-13 NMR, polarized optical microscopy, wide-angle X-ray diffraction, and differential scanning calorimetry, respectively. The crystallization activation energy increases from -286.43 to -212.43 kJ mol(-1) as the co-polyamide bond ratio increases from 0 to 0.22, while the deteriorating sequence regularity does not alter the original crystal morphology and crystal forms of PA6. Significantly, control over the crystallization behavior of PA6/66 copolymer has been obtained through finely regulating its sequence distribution. This work could provide theoretical support and new insights for controllable preparation of PA6 copolymers and ultimately be beneficial to extend their applications.