摘要
分别采用7种不同粒径的二氧化钛制备了顺丁橡胶/二氧化钛复合材料,通过核磁共振交联密度仪、橡胶加工分析仪等研究了二氧化钛的粒径对其硫化特性、交联密度、物理机械性能和动态力学性能的影响。结果表明,在顺丁橡胶中填充纳米级二氧化钛后,复合材料的正硫化时间比填充微米级二氧化钛者明显延长,且前者的拉伸强度可达到纯顺丁橡胶的6倍;当二氧化钛的粒径为20 nm和50 nm时,顺丁橡胶/二氧化钛复合材料的损耗因子、储能模量和损耗模量要远大于填充微米级填料者,且呈现出明显的Payne效应。
The cis-1,4-polybutadiene rubber（BR）/titani- um dioxide（TiO2） composites were prepared by filling seven kinds of TiO2 with different particle sizes in BR,respectively. The effects of particle size on vulcanization characteristics, crosslinking density, mechanical and dynamic mechanical properties of BR/TiO2 composites were studied by nuclear magnetic resonance, crosslinking density spectrometer and rubber process analyzer. The results showed that the optimum cure time of nanoscale TiO2 filled BR composites was significantly longer than that of micronsize filled one and six times as many as pure BR in tensile strength. When TiO2 with partical size of 20 nm or 50 nm was filled, the loss factor, storage modulus and loss modulus of the composites were far greater than those of micronsize filled one, and the composites exhibited obvious Payne effect.
出处
《合成橡胶工业》
CAS
CSCD
北大核心
2012年第1期70-74,共5页
China Synthetic Rubber Industry
关键词
二氧化钛
粒径
顺丁橡胶
交联密度
物理机械性能
动态力学性能
titanium dioxide
particle size
cis-1,4-polybutadiene rubber
crosslinking density
mechanical property
dynamic mechanical property
