微生物凝固天然橡胶与酸凝固天然橡胶的性能差异  

Property difference between microbial coagulation natural rubber and acid coagulation natural rubber

作　　者：钟杰平[1] 李程鹏[1] 佘晓东 李思东[1] 杨磊[1] 

机构地区：[1]广东海洋大学理学院,广东湛江524088 [2]华南热带农业大学理工学院,海南儋州571737

出　　处：《弹性体》2008年第4期1-4,共4页China Elastomerics

基　　金：国家自然科学基金资助项目(50573064);国家自然科学基金资助项目(50773013);广东省科技计划(2007A020200006-16)

摘　　要：为揭示微生物凝固天然橡胶(NR-w)和酸凝固天然橡胶(NR-a)的性能差别,制备了3个系列的NR,并对其性能进行了全面的研究。结果发现,在生胶性能方面,NR-w凝胶含量和塑性初值均高于NR-a,而分子量低于NR-a。对于硫化胶,NR-w纯胶硫化胶的力学性能远高于NR-a纯胶,而NR-w炭黑胶的力学强度与NR-a炭黑胶很接近;此外,NR-a纯胶的抗老化性能远高于NR-w,其炭黑胶的抗老化性能也高于NR-w。在硫化性能方面,NR-w的转矩增大速率快于NR-a,强度也比NR-a高。在动态性能方面,NR-w的抗湿滑性能和滚动阻力均高于NR-a。In order to explore the property difference between microbial coagulation natural rubber （NR-w） and acid coagulation natural rubber （NR-a）, three kinds of natural rubbers were prepared, and their properties were studied comprehensively. The results showed that, as to the raw rubber, the gel content and initial plasticity of NR-w are higher than NR-a, while the molecular weight of NR-w are lower than NR-a. As to the cured rubber, the mechanical strength of cured NR-w without carbon black is much higher than cured NR-a without carbon black, while the mechanical strength of cured NR-w with carbon black is close to cured NR-a with carbon black. Furthermore, the aging resistance of cured NR-a without carbon black is much higher than NR-w without carbon black, and the aging resistance of cured NR-a with carbon black is still higher than NR-w with carbon black. To the curing behaviors, the torque rate of NR-w is higher than NR-a, and the strength is higher than NR-a too. To the dynamic performance,the wet skid resistance and rolling resistance of NR-w are both higher than NR-a.

关 键 词：天然橡胶 性能 微生物凝固 酸凝固 

分 类 号：TQ332.5[化学工程—橡胶工业]