摘要
以氢化钠(NaH)为引发剂、马来酸酐(MAH)为改性剂,制备了多官能化改性天然橡胶(NR)(MFNR),并对其反应机理、结构及性能进行了研究。结果表明,NaH与NR反应生成碳负离子,进攻MAH分子中的碳氧双键,打开MAH环状结构,得到MFNR。相比于NR,MFNR的焦烧时间与正硫化时间均缩短,撕裂强度有大幅提高,交联密度变化不大,储能模量增大。随着NaH和MAH用量的增加,MFNR的官能化反应程度增大。
Multifunctional modified natural rubber （NR） （MFNR） was prepared using sodium hydride （Nail） as initiator and maleic anhydride（MAH） as modifier. And the reaction mechanism, structure and properties of MFNR were studied. The results showed that Nail generated carbanion by reacting with NR, and the carbanion attacked the double bonds of C =0 in MAH molecular to open the cyclic structure of MAH, the MFNR obtained. Comparedto NR, the scorch time and optimum cure time of MFNR shortened,the tear strength increased greatly, the crosslinking density changed little, and the stor- age modulus increased. The degree of functionaliza- tion of MFNR increased with increasing amounts of Nail and MAH.
作者
王同海
张翠美
赵季若
冯莺
WANG Tong-hai ZHANG Cui-mei ZHAO Ji-ruo FENG Ying(Key Laboratory of Rubber-Plastics of Ministry of Education/ Shandong Provincial Key Laboratory of Rubber-Plastics, Qingdao University of Science ＆ Technology, Qingdao 266042, Chin)
出处
《合成橡胶工业》
CAS
CSCD
北大核心
2017年第2期94-98,共5页
China Synthetic Rubber Industry
基金
国家自然科学基金资助项目(51173088)
关键词
天然橡胶
多官能化
反应机理
碳负离子
硫化特性
力学性能
natural rubber
multifunctionaliza-tion
reaction mechanism
carbanion
curing chara-cteristics
mechanical property
