国产溶聚丁苯橡胶T2000 R的微观结构及基本性能  

Microstructure and basic properties of domestic solution polymerized styrene-butadiene rubber T 2000 R

作　　者：张萍[1] 孙学红[1] 袁媛[1] 孙举涛[1] 赵树高[1] 

机构地区：[1]青岛科技大学橡塑材料与工程教育部重点实验室,山东青岛266042

出　　处：《合成橡胶工业》2010年第2期120-125,共6页China Synthetic Rubber Industry

基　　金：国家自然科学基金资助项目(20674043)

摘　　要：采用傅里叶变换红外光谱分析、凝胶渗透色谱-激光光散射-自动黏度在线检测仪、动态力学性能分析及差示扫描量热仪等手段对国产溶聚丁苯橡胶(SSBR-T2000 R)的微观结构及其基本性能进行了分析与表征,并与乳聚丁苯橡胶(ESBR-1502)作了对比。结果表明,与ESBR-1502相比,SSBR-T2000 R具有分子量分布窄、数均分子量较高、重均分子量明显低、支化度低的特点;其链结构中顺式-1,4-结构含量高、反式-1,4-结构、1,2-结构含量低;热稳定性高于ESBR-1502;玻璃化转变温度比ESBR-1502低,说明其具有优异的低温性能;高弹态动态模量较低,但其动态损耗因子和动态生热低于ESBR-1502;其硫化特性为焦烧时间较长,而正硫化时间较短;用密炼机加工胶料,SSBR-T2000 R的耐屈挠龟裂性优于ESBR-1502,且压缩生热较低。The characterization of microstructure and basic properties of domestic solution-polymerized styrene-butadiene rubber（SSBR-T 2000 R） was carried out by different means,such as Fourier transform infrared spectroscopy,gel permeation chromatography-laser light scattering-automatic online viscosity detector,dynamic mechanical analysis and differential scanning calorimeter,and the comparison with emulsion styrene-butadiene rubber（ESBR-1502） was made.The results showed that SSBR-T 2000 R had a narrower molecular mass distribution,higher number-average molecular mass,significantly lower weight-average molecular mass and lower branching degree compared with ESBR-1502.Its cis-1,4-unit content was higher,while trans-1,4-unit and 1,2-unit content lower than those of ESBR-1502.Its thermal stability was higher than ESBR-1502.Its glass transition temperature was lower than ESBR-1502 which indicated that it had a better low temperature property.Under dynamic application,SSBR-T 2000 R had lower dynamic modulus,loss factor and dynamic heat build-up than ESBR-1502.For cure characteristics,SSBR-T 2000 R had a longer scorch time and shorter optimal curing time than ESBR-1502.SSBR-T 2000 R vulcanizates showed better flex-crack resistance and lower compression heat build-up than ESBR-1502 when compounds mixed by internal mixer.

关 键 词：溶聚丁苯橡胶 乳聚丁苯橡胶 微观结构 基本性能 

分 类 号：TQ333.1[化学工程—橡胶工业]