SBR/高耐磨炭黑的共混方式对其硫化胶性能的影响  

Influence of mixing process for SBR/HAF on properties of vulcanizate

作　　者：胡洪军[1] 王炼石[1] 周奕雨[1] 

机构地区：[1]华南理工大学材料学院高分子系,广东广州510640

出　　处：《橡胶工业》2001年第11期645-650,共6页China Rubber Industry

基　　金：国家自然科学基金资助项目 (5 97730 10 );广东省科委基金资助项目 (970 5 5 4)

摘　　要：测定了高耐磨炭黑填充型粉末SBR[P(SBR/HAF) ],SBR胶乳 /炭黑共沉胶 (ESBR/HAF)和SBR块胶 /炭黑机械混炼胶 (MSBR/HAF) 3种不同共混方式的硫化胶的力学性能。结果发现 ,在炭黑填充量相同的条件下 ,3种硫化胶的定伸应力和拉伸强度的大小顺序为MSBR/HAF >P(SBR/HAF) >ESBR/HAF ,撕裂强度及扯断永久变形的大小顺序为ESBR/HAF >P(SBR/HAF) >MSBR/HAF。拉伸断面形貌的SEM分析表明 ,MS BR/HAF硫化胶以微裂纹导致基体空化 ,P(SBR/HAF)以既有微裂纹导致基体空化又有裂缝扩展及分支 ,ES BR/HAF则以裂缝扩展及分支的方式断裂。The mechanical properties of the vulcanizates prepared by HAF-filled powdered SBR [P(SBR/HAF)],SBR latex/HAF coprecipitation (ESBR/HAF) and bale SBR/HAF (MSBR/HAF) mixes respectively were investigated.The results showed that with the same addition level of carbon black,the values of modulus and tensile strength for MSBR/HAF,P(SBR/HAF) and ESBR/HAF vulcanizates were in the order of the first>the second>the third,the tear strength and the tensile set at break were in the order of the third>the second>the first.It was found through the observation of the surface morphology at tensile fracture by SEM that the fracture behavior of MSBR/HAF vulcanizate was the rubber matrix cavitation caused by microcrack,that of P(SBR/HAF) was both the rubber matrix cavitation caused microcrack and the crack growth and branching,and that of ESBR/HAF was the crack growth and branching.

关 键 词：炭黑填充型粉末 SBR SBR胶乳/炭黑共混胶 丁苯橡胶 SBR块胶/炭黑胶 力学性能 拉伸断裂方式 硫化胶 

分 类 号：TQ330[化学工程—橡胶工业]