结合苯乙烯含量对丁苯橡胶性能的影响  

Effect of combinated styrene content on properties of styrene-butadiene rubber(SBR)

作　　者：王真琴[1] 吴福生[2] 

机构地区：[1]中国石油天然气股份有限公司兰州石化分公司石油化工研究院,甘肃兰州730060 [2]中国石油天然气股份有限公司兰州石化分公司合成橡胶厂,甘肃兰州730060

出　　处：《弹性体》2003年第3期22-24,共3页China Elastomerics

基　　金：兰州石化分公司工业开发项目。

摘　　要：研究了结合苯乙烯质量分数在22.5%～24.5%范围内变化时,对丁苯橡胶性能的影响。结果表明,随结合苯乙烯提高,SBR1500相对分子质量及其分布变化微小;生胶门尼粘度、拉伸强度、300%定伸强度稍有增大,而扯断伸长率明显降低,扯断永久变形有所增大,硬度提高,而撕裂强度、回弹值降低;橡胶的硫化性能中最大转矩、最小转矩有所增大,硫化时间T10、T90有所延长,阿克隆磨耗量、屈挠温升增大;并且丁苯橡胶的抗热氧老化性能有所提高,抗热分解的能力明显增强。Effect of combinated styrene content ranged in 22.5%～24.5% on properties of styrenebutadiene rubber(SBR) produced in 45kt/a plant was studied. The results showed that the relative molecular mass (Mw) and its distribution of SBR1500 changed little with the increasing of combinated styrene content;mancely mooney viscosity increased from 50 to 53; the tensile strength and modulus at 300% increased 1.0?MPa and 0.5?MPa,but elongation at break decreased 43%,permanent set increased 1.8%,shore A hardness increased from 63 to 69,tear strength decreased; the maximal and minimal torsion increased about 0.1 N.m, cure time T10、T90 increased 1.2?min、4?min.resp. akron abrasion loss and flexural heat buildup increased; aging properties of heatoxygen resistance increased, properties of heat break resistance clearly increased.

关 键 词：苯乙烯 含量 丁苯橡胶 性能 相对分子质量 

分 类 号：TQ333.1[化学工程—橡胶工业]