白炭黑粒子间距对天然橡胶复合材料性能的影响  

Effect of Silica Particle Spacing on Properties of NR Composite

作　　者：肖亚轲 邹华[1] 韩冬礼 XIAO Yake;ZOU Hua;HAN Dongli(Beijing University of Chemical Technology,Beijing 100029,China)

机构地区：[1]北京化工大学北京市新型高分子材料制备与加工重点实验室,北京100029

出　　处：《橡胶工业》2020年第8期570-574,共5页China Rubber Industry

摘　　要：分别采用不同分子链长度的改性剂乙二醇二缩水甘油醚、丁二醇二缩水甘油醚、己二醇二缩水甘油醚和聚乙二醇二缩水甘油醚(PEGDGE)对白炭黑进行隔离改性,研究改性白炭黑对天然橡胶(NR)复合材料性能的影响。结果表明:与未改性白炭黑填充的NR复合材料相比,改性白炭黑填充的NR复合材料的t10和t90缩短,FL和储能模量(G′)减小,硬度降低,拉伸强度、拉断伸长率和撕裂强度提高;当改性剂为PEGDGE(回转半径为1.11 nm)时,改性白炭黑的粒子间距最大,分散性最好,NR复合材料的交联密度最大,G′和损耗因子最小,物理性能最佳。In this study,silica was modified by using modifiers with different molecular chain length and the effect of modified silica on the properties of natural rubber(NR)composite was studied.The modifiers included ethylene glycol diglycidyl ether,butanediol diglycidyl ether,hexanediol diglycidyl ether and poly(ethylene glycol)diglycidyl ether(PEGDGE).The results showed that compared with the NR composite filled with unmodified silica,the t10 and t90 of the NR composite filled with modified silica were shortened,the FL,storage modulus(G′)and hardness decreased,and the tensile strength,elongation at break and tear strength increased.With PEGDGE as the modifier which had a radius of gyration of 1.11 nm,the particle spacing of modified silica was the largest,the dispersion was the best,the crosslinking density of NR composite was the largest,the G′and loss factor were the smallest,and the physical properties were the best.

关 键 词：白炭黑 天然橡胶 复合材料 二缩水甘油醚 粒子间距 隔离 改性 

分 类 号：TQ330.38+3[化学工程—橡胶工业] TQ332