氢化钠/马来酸酐体系改性天然橡胶的制备及性能  

Preparation and properties of natural rubber modified with sodium hydride/maleic anhydride system

作　　者：王同海[1] 张翠美[1] 赵季若[1] 冯莺[1] 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)

机构地区：[1]青岛科技大学橡塑材料与工程教育部重点实验室/山东省橡塑材料与工程重点实验室,山东青岛266042

出　　处：《合成橡胶工业》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)

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.

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 

分 类 号：TQ332.5[化学工程—橡胶工业]