文献类型：期刊文献

英文题名：Semi-aromatic poly(m-xylylene adipamide-co-isophthalamide) copolyamides (MXD6/I): Effect of isophthalic acid on the thermal, crystallization, mechanical, and barrier properties

作者：Guo, Chaoyi[1];Jiang, Jie[1,2];Zhu, Zhihua[1];Li, Jinjin[1];Zhao, Ling[1];Xi, Zhenhao[1]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai Key Lab Adv Polymer Mat, Key Lab Ultrafine Mat,Minist Educ, Shanghai, Peoples R China

年份：2024

卷号：141

期号：42

外文期刊名：JOURNAL OF APPLIED POLYMER SCIENCE

收录：;EI(收录号：20243216840597);WOS:【SCI-EXPANDED(收录号:WOS:001286174100001)】；

基金：National Natural Science Foundation of China, Grant/Award Numbers: 22308098, 21978089, 22278129; Program of Shanghai Academic/Technology Research Leader,Grant/Award Number: 21XD1433000; Key Research and Development Program of Xinjiang Uygur Autonomous Region, Grant/Award Number: 2022B01032-1

语种：英文

外文关键词：copolymers; glass transition; mechanical properties; polyamides; polycondensation

摘要：Semi-aromatic nylon MXD6 shows superior mechanical strength and gas barrier properties. To improve its toughness and get sight into its excellent properties, a series of poly(m-xylylene adipamide-co-isophthalamide) (MXD6/I) random copolyamides were synthesized using adipic acid, isophthalic acid (IPA) and m-xylylene diamine as monomers via direct melt polycondensation. The effect of IPA content on the thermal, crystallization, heat resistant, mechanical, and barrier properties of the copolyamides were systematically investigated. The results showed that the increase of IPA content from 0 to 12 mol% resulted in a decrease in the melting point of the copolyamides from 238 to 217 degrees C but the glass transition temperature (T-g) increased from 88 to 105 degrees C. Correspondingly, the Vicat softening temperature decreased from 199.2 to 172.5 degrees C. The crystallization rate of the copolyamides significantly decreased with the increase of the IPA content. The copolyamides had improved elongation and rupture energy and decent oxygen barrier properties with the introduction of IPA. It is expected that this study would guide design of MXD6 macromolecular chain structure to prepare high-performance MXD6 materials.