甲基丙烯酸镁对丁苯橡胶的补强作用

Reinforcement of Styrene-Butadiene Rubber (SBR) by Magnesium Mathacrylate

研究了在过氧化物硫化丁苯橡胶 (SBR)中 ,过氧化二异丙苯 (DCP)用量和甲基丙烯酸镁(Mg(MAA) 2 )用量对 SBR力学性能、动态力学性能和交联结构的影响 .结果表明 ,DCP用量在 0 .2～ 1 .0份时对硫化胶的抗张强度影响不大 ,但是远远大于未硫化橡胶的强度 ;DCP用量增加后硫化胶的拉伸模量和硬度都有较大的提高 ,扯断永久变形逐渐减小 ,储能模量 (E′)逐渐增大 ,损耗角正切 (tanδ)则逐渐减小 .DCP用量一定时 ,随着 Mg(MAA) 2 用量的增加 ,硫化胶的强度、模量、硬度、扯断伸长率、扯断永久变形和 E′都有较大幅度的提高 ,tanδ值在 Mg(MAA) 2 用量少于 40份时呈逐渐下降趋势 .在 Mg(MAA) 2 用量为 40份时 ,可以获得同时具有高强度、高模量、高伸长、高硬度等优良性能的

The mechanical properties, dynamic mechanical properties and crosslink network structure of dicumyl peroxide (DCP) cured styrene butadiene rubber (SBR) reinforced by magnesium mathacrylate (Mg(MAA) 2) were studied. With the increase of DCP content from 0.2~1.0 phr, the modulus, hardness and elastic modulus ( E ′) of SBR vulcanizates increase but the tensile set at break decreases. And the DCP content 0.2~1.0 phr has little effect on the tensile strength and tear strength. With increasing the content of Mg(MAA) 2, the tensile strength. tear strength, modulus, hardness, elongation at break, tensile set at break and E ′ increase, but tan δ decreases at Mg(MAA) 2 content on more than 40 phr. When the loading of Mg(MAA) 2 is 40 phr, the SBR vulcanizates have a good comprehension of high tensile strength and modulus, long elongation at break and high hardness.