橡胶技术网

合成橡胶工业
CHINA SYNTHETIC RUBBER INDUSTRY
2010 Vol.33 No.2 P.120-125

 橡胶技术网

国产溶聚丁苯橡胶T 2000 R的微观结构及基本性能

张萍　 孙学红　 袁媛　 孙举涛　 赵树高　

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-T 2000 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-T 2000 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-T 2000 R的耐屈挠龟裂性优于ESBR-1502,且压缩生热较低.
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　文献标识码：B
文章编号：1000-1255(2010)02-0120-06

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

Zhang Ping（Key Laboratory of Rubber-Plastics of Ministry of Education, Qingdao University of Science and Technology, Qingdao 266042, China）　 Sun Xuehong（Key Laboratory of Rubber-Plastics of Ministry of Education, Qingdao University of Science and Technology, Qingdao 266042, China）　 Yuan Yuan（Key Laboratory of Rubber-Plastics of Ministry of Education, Qingdao University of Science and Technology, Qingdao 266042, China）　 Sun Jutao（Key Laboratory of Rubber-Plastics of Ministry of Education, Qingdao University of Science and Technology, Qingdao 266042, China）　 Zhao Shugao（Key Laboratory of Rubber-Plastics of Ministry of Education, Qingdao University of Science and Technology, Qingdao 266042, China）　

Abstract：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.
Keywords：solution-polymerized styrene-butadiene rubber; emulsion styrene-butadiene rubber; microstructure; basic property

基金项目：国家自然科学基金资助项目(20674043).
作者简介：张萍(1953-),女,教授.已发表论文80余篇.
作者单位：张萍（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）　
　　　　　孙学红（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）　
　　　　　袁媛（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）　
　　　　　孙举涛（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）　
　　　　　赵树高（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）　

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收稿日期：2009年3月15日

修稿日期：2009年12月21日

出版日期：2010年3月15日