衣康酸单乙酯钆改性天然胶乳防热氧老化研究  

Study on Natural Rubber Modifi ed by Monoethyl Itaconate Gadolinium to Enhance Thermal and Oxygen Aging Performance

作　　者：李永振 谢莉词[3] 李俊杰 李程鹏 吕明哲 Li Yongzhen;Xie Lici;Li Junjie;Li Chengpeng;Lv Mingzhe(School of Physical Science and Technology,Lingnan Normal University,Guangdong,524048;Institute of Agricultural Product Processing,Chinese Academy of Tropical Agricultural Sciences,Key Laboratory of Tropical Crop Product Processing,Ministry of Agriculture and Rural Aff airs,Guangdong,524001;School of Chemistry and Environment,Guangdong Ocean University,Guangdong,524088)

机构地区：[1]岭南师范学院物理科学与技术学院,广东524048 [2]中国热带农业科学院农产品加工研究所农业农村部热带作物产品加工重点实验室,广东524001 [3]广东海洋大学化学与环境学院,广东524088

出　　处：《当代化工研究》2024年第10期50-52,共3页Modern Chemical Research

基　　金：2021年海南省科学基金项目“耐迁移防老化体系的构建及其对硫化橡胶结构与性能的影响”(项目编号:521MS081)。

摘　　要：为提高天然橡胶的热氧老化性能,利用衣康酸单乙酯和氧化钆为原料在天然胶乳中生成衣康酸单乙酯钆,研究了在过二硫酸钾引发下对天然橡胶接枝改性及其改性后热氧老化性能。结果表明,衣康酸单乙酯钆盐成功接枝到天然橡胶。衣康酸单乙酯的加入削弱了热氧老化对橡胶材料力学性能的影响。改性橡胶的初始降解温度和最大降解速率对应的温度较天然橡胶分别提高了35.6℃和23.8℃。作为新型橡胶助剂,衣康酸单乙酯钆有望改善橡胶防老剂对环境的影响。Monoethyl Itaconate gadolinium was synthesized by compounding Monoethyl Itaconate and gadolinium oxide inside natural rubber latex with the aim of enhancing thermal and oxygen aging performance of natural rubber.The graft copolymerization happened with initiation of anthion.Monoethyl Itaconate gadolinium salt has been confirmed grafted with NR by comparison of FTIR of modified NR and that of Monoethyl Itaconate gadolinium combining with the crosslinking density testing analysis.Introduction of monoethyl Itaconate gadolinium salt prevent NR from oxygen and heating effects.Initial degradation temperature and the temperature at which the degradation reach the highest speed of the modified NR increased 35.6℃and 23.8℃respectively compared with NR.Thermo gravimetric analysis results and comparison of thermal and oxygen aging performance indicated that the heat resistance and anti-aging properties of modified NR have been enhanced.

关 键 词：天然胶乳 衣康酸单乙酯钆 耐热性 热氧老化性能 

分 类 号：TQ332.5[化学工程—橡胶工业]