纳米介孔MCM-41-M/偶联剂体系对天然橡胶性能的影响

制备了天然橡胶(NR)/MCM-41-M、NR/偶联剂化学改性纳米介孔MCM-41-M、NR/MCM-41-M/偶联剂复合材料,研究了不同含量的MCM-41-M、不同种类偶联剂对MCM 41-M的改性以及偶联剂的添加方式对NR复合材料性能的影响.结果表明;MCM-41-M在NR中有明显的补强作用,当代替3份炭黑时NR基复合材料的拉伸强度达到最大值,比纯NR提高了12.7%。与MCM-41-M和KH-570直接添加到NR中相比,MCM-41-M经偶联剂KH-570改性使拉伸强度提高了50%。将MCM-41-M用偶联剂KH 570改性后添加到NR中,使NR的玻璃化转变温度升高、玻璃化转变区的损耗角减小、储能模量提高到最大。

Effect of System of Nano-sized Mesoporous MCM-41-M/Coupling Agents on the Properties of Natural Rubber Composites

The nano-sized mesoporous MCM-41-M,chemical modification of MCM-41-M by coupling agents,and four different coupling agents were used to prepare natural rubber(NR) composites. The effects of content of nano-sized mesoporous MCM-41-M,the kinds of coupling agents,and adding method of coupling agent on the mechanical properties of the composites were investigated.The results show that the MCM-41-M has better reinforcing effects in the NR matrix.The tensile strength of the NR composites raised by 12.7%compared with pure NR when the content(mass fraction) of MCM-41-M is 3%.Compared with NR/MCM-41-M/KH-570,the tensile strength of NR/KH-570 modified MCM-41-M raised by 50%.NR/KH-570 modified MCM-41-M shows a higher glass transition temperature,lower tanδpeak value and higher storage modulus under all temperature regions.