抗硫化返原剂KA9188对天然橡胶胶料性能的影响  

Effect of Anti-reversion Agent KA9188 on Properties of NR Compounds

作　　者：王辰 冯林兆 赖亮庆 苏正涛 WANG Chen;FENG Linzhao;LAI Liangqing;SU Zhengtao(AECC Beijing Institute of Aeronautical Materials,Beijing 100095,China)

机构地区：[1]中国航发北京航空材料研究院,中国航空发动机集团减振降噪材料及应用技术重点实验室,北京100095

出　　处：《橡胶工业》2022年第12期915-920,共6页China Rubber Industry

基　　金：民机科研项目(MJ-2018-F-15)。

摘　　要：研究抗硫化返原剂KA9188(简称KA9188)用量对硫黄用量分别为1.2和0.5份的K和S系配方天然橡胶(NR)胶料性能的影响。结果表明:S系配方NR胶料的硫化返原率远小于K系配方NR胶料,表明KA9188可以显著提升S系配方NR胶料的抗硫化返原性能;随着KA9188用量的增大,K和S系配方NR硫化胶的交联密度、邵尔A型硬度和定伸应力增大,拉伸强度、拉断伸长率和撕裂强度减小,在玻璃化温度(T_(g))下K和S系配方NR硫化胶的损耗因子增大、动态剪切模量减小;与K系配方NR硫化胶的T_(g)相比,S系配方NR硫化胶的T_(g)向低温方向移动的趋势略大,这是因为KA9188分子中的亚甲基长链为NR硫化胶提供的交联网络柔顺性略好于单硫键和双硫键;K系配方NR硫化胶的交联密度大于S系配方NR硫化胶。The effect of the amounts of anti-reversion agent KA9188(KA9188 for short)on the properties of natural rubber(NR)compounds of K and S series formulations with sulfur amounts of 1.2 and 0.5 phr,respectively,was studied.The results showed that the reversion rates of the NR compounds of S series formulations were much lower than those of the NR compounds of K series formulations,indicating that KA9188 could significantly improve the anti-reversion properties of the NR compounds of S series formulations.With the increase of the amounts of KA9188,the crosslinking densities,Shore A hardnesses and moduli of the NR vulcanizates of K and S series formulations increased,the tensile strengths,elongations at break and tear strengths decreased,the loss factors of the vulcanizates at the glass transition temperatures(Tg)increased and the dynamic shear moduli at T_(g) decreased.Compared with the T_(g) of the NR vulcanizates of K series formulations,the T_(g) of the NR vulcanizates of S series formulation had a slightly higher tendency to move to the low temperature direction,because the long methylene chains in the KA9188 molecule provided the NR vulcanizates with slightly better cross-linking network flexibilities than monosulfide bonds and disulfide bonds.The cross-linking densities of the NR vulcanizates of K series formulations were greater than that of the NR vulcanizates of S series formulations.

关 键 词：抗硫化返原剂 天然橡胶 交联密度 拉伸性能 玻璃化温度 

分 类 号：TQ332.6[化学工程—橡胶工业] TQ330.385