改性大豆分离蛋白对顺丁橡胶/丁苯橡胶复合材料性能的影响  

Effects of modified soy protein isolate on properties of butadiene rubber/styrene-butadiene rubber composites

作　　者：李天宇 方庆红[2,3] 王娜[2,3] 张秀斌[2,3] 王重[2,3] 

机构地区：[1]朝阳浪马轮胎有限责任公司,辽宁朝阳122009 [2]沈阳化工大学材料科学与工程学院,辽宁沈阳110142 [3]沈阳化工大学辽宁省高校高分子应用技术重点实验室,辽宁沈阳110142

出　　处：《合成橡胶工业》2011年第6期470-473,共4页China Synthetic Rubber Industry

基　　金：国家自然科学基金资助项目(51173110);辽宁省高校优秀人才计划资助项目(2008 RC 41)

摘　　要：将糊化改性的大豆分离蛋白(SPI)等量替代炭黑填充至顺丁橡胶/丁苯橡胶中,研究了改性SPI的粒径和热性能,考察了改性SPI用量对橡胶复合材料物理机械性能、热性能、压缩生热性能的影响,并与白炭黑和轻质碳酸钙填充复合材料进行了对比。结果表明,改性SPI的中位径由原来的115.25μm减小至37.63μm,比表面积由原来的20.94 m2/kg增加至66.00 m2/kg,且热稳定性明显高于原SPI;随着改性SPI用量的增加,复合材料的拉伸强度、300%定伸应力和耐磨性能逐渐降低,扯断伸长率提高,邵尔A硬度和回弹率没有太大影响,热稳定性和压缩温升提高;与其他填料相比,3份改性SPI填充复合材料的拉伸强度和300%定伸应力最大,试中温升最小。The soy protein isolate（SPI） modified by gelatinization was filled into butadiene rubber/styrene-butadiene rubber composites to replace equivalent to carbon black.The particle size and thermal stability of modified SPI was studied.Meanwhile,the effects of amount of modified SPI on mechanical properties,thermal stability and heat building up of rubber composites were also investigated,and the properties of the modified SPI filled rubber composites were compared with those of composites filled with silica or calcium carbonate.The results showed that the particle size decreased from 115.25 ？？ to 37.63 ？？,and the specific surface area increased from 20.94 m2/kg to 66.00 m2/kg for the modified SPI,moreover,its thermal stability was higher than unmodified SPI obviously.With increasing modified SPI amount,the tensile strength,modulus at 300% and abrasion resistance of the rubber composites gradually reduced,and elongation at break,thermal stability and heat building up enhanced,but Shore A hardness and resilience were not affected evidently.Compared to other fillers,the tensile strength and modulus at 300% of the composites with 3 phr modified SPI were the maximum,and middle boosted temperature was the minimum.

关 键 词：大豆分离蛋白 改性 顺丁橡胶 丁苯橡胶 物理机械性能 热稳定性 压缩生热 

分 类 号：TQ330.3[化学工程—橡胶工业]