DCP用量及变速拉伸对NBR硫化胶性能的影响

Effects of DCP dosage and variable speed stretching on the properties of NBR vulcanizates

探究了NBR硫化胶在DCP/TAIC过氧化物硫化体系及变速拉伸双变量的影响下,硫化胶大分子链及交联网络的应力松弛状态对硫化胶力学性能的影响。研究表明,在不同拉伸速度拉伸过程中,随拉伸速度增加,硫化胶力学松弛性能减弱,导致硫化胶力学性能增强;DCP/TAIC用量增加使得C—C交联键数量增多,增强了橡胶分子链间相互作用力,松弛过程变得困难,硫化胶力学性能增强;增加拉伸速度和增加DCP用量对胶料的拉伸力学性能有相同效果。

Under the influence of DCP/TAIC peroxide vulcanization system and variable speed stretching bivariate of NBR vulcanizate,the effect of stress relaxation state of vulcanizate macromolecular chain and cross-linked network on the mechanical properties of vulcanizate was investigated.Studies have shown that with the increase of tensile speed,the mechanical relaxation properties of vulcanizates are weakened,resulting in enhanced mechanical properties of vulcanizates.The increase in the amount of DCP/TAIC increases the number of C-C crosslinks,which enhances the interaction force between rubber molecular chains,makes the relaxation process difficult,and enhances the mechanical properties of the vulcanizate.Increasing the tensile speed and increasing the amount of DCP have the same effect on the tensile mechanical properties of the compound.