白炭黑粒子间距对天然橡胶复合材料性能的影响

分别采用不同分子链长度的改性剂乙二醇二缩水甘油醚（GDE）、丁二醇二缩水甘油醚（BDE）、己二醇二缩水甘油醚（HDE）和聚乙二醇二缩水甘油醚（PEGDGE）对白炭黑进行隔离改性，研究改性白炭黑对天然橡胶（NR）复合材料性能的影响。结果表明：与未改性白炭黑填充的NR复合材料相比，改性白炭黑填充的NR复合材料的t10和t90缩短，FL和储能模量（G′）减小，硬度降低，拉伸强度、拉断伸长率和撕裂强度提高；当改性剂为PEGDGE（回转半径为1.11 nm）时，改性白炭黑的粒子间距最大，分散性最好，NR复合材料的交联密度最大，G′和损耗因子最小，物理性能最佳。;The different molecular chain length modifiers ethylene glycol diglycidyl ether（GDE），butanediol diglycidyl ether（BDE），hexanediol diglycidyl ether （HDE） and poly（ethylene glycol diglycidyl ether）（PEGDGE） were used to isolate modifing the silica，and the effect of modified silica on the properties of natural rubber（NR） composite was studied.The results showed that compared with the NR composite filled with unmodified silica，the t10 and t90 of the NR composite filled with modified silica were shortened，the FL，storage modulus（G′）and hardness decreased，the tensile strength，elongation at break and tear strength increased.When the modifier was PEGDGE（the radius of gyration was 1.11 nm），the particle spacing of modified silica was the largest，the dispersion was the best，the crosslinking density of NR composite was the largest，the G′ and loss factor were the smallest，and the physical properties were the best