【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。更多还原

【Abstract】 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.更多还原