低温下低动静刚度天然橡胶胶料的配方研究  

Research on Formula of NR Compound with Low Static and Dynamic Stiffness at Low Temperature

作　　者：吉雷波 张新军 JI Leibo;ZHANG Xinjun(Zaozhuang Sanxing High and New Material Co.,Ltd,Zaozhuang 277319,China;Beijing Research and Design Institute of Rubber Industry Co.,Ltd,Beijing 100143,China)

机构地区：[1]枣庄市三兴高新材料有限公司,山东枣庄277319 [2]北京橡胶工业研究设计院有限公司,北京100143

出　　处：《橡胶工业》2023年第8期596-600,共5页China Rubber Industry

摘　　要：对低温下低动静刚度天然橡胶(NR)胶料的配方进行研究。结果表明:N-苯基马来酰亚胺(N-PMI)具有较高的反应活性,可在混炼或/和硫化时通过加成反应键接到NR分子主链上,降低NR分子链的规整性,从而明显降低NR的低温结晶性;添加N-PMI的硫黄硫化体系NR胶料和过氧化物硫化体系NR胶料在-40℃时的弹性模量和硬度均较低,采用这两种硫化体系NR胶料的制品在低温下表现出低动静刚度,这两种硫化体系NR胶料的N-PMI最佳用量均为5份。The formula of natural rubber(NR)compound with low static and dynamic stiffness at low temperatures was studied.The results showed that N-phenyl maleimide imide(N-PMI)had high reactivity and could be bonded to the main chain of NR molecules through addition reaction during mixing or/and vulcanization which reduced the regularity of NR molecular chain,and thus significantly reduced the lowtemperature crystallinity of NR.The NR compounds with N-PMI cured with sulfur vulcanization system or peroxide vulcanization system had low elastic modulus and hardness at-40℃.The products using these two NR compounds exhibited low static and dynamic stiffnesses at low temperatures,and the optimal dosage of N-PMI for both NR compounds was 5 phr.

关 键 词：天然橡胶 N-苯基马来酰亚胺 低温结晶 低动静刚度 

分 类 号：TQ332.6[化学工程—橡胶工业]