硫化体系对CR／SBR共混胶性能的影响

探讨了给硫体和TCY／给硫体2种不同硫化体系对CR／SBR共混胶硫化特性、硫化橡胶力学性能和耐热老化性能的影响。结果表明：含DTDM的共混胶焦烧时间较长。正硫化时间较短，硫化特性较好。采用TCY／给硫体复合硫化体系且随着TCY用量的增加，CR／SBR硫化橡胶拉伸强度先增大后减小，TCY用量为1份拉伸强度达到最大值（23．0MPa）。2种不同硫化体系的硫化橡胶耐热老化性能都较好，老化后拉伸强度保持率在100％左右，拉断伸长率保持率也在70％左右。

Effects of Curing Systems on the Properties of CR/SBR Vulcanizates

The effects of 2 kinds of different curing systems, such as the sulfur donors and TCY/ sulfur donors, on the curing characteristics,mechanical properties and heat age resistance of CR/SBR blends were studied. The results showed that the scorch time of the blends with DTDM was long, the optimum cure time was short, and the curing characteristics were good; The tensile strength of CR/ SBR vulcanizates first increased and then decreased with increasing of TCY content and by using the TCY/ sulfur donors curing system. And the maximum value of the tensile strength was 23.0MPa by adding lphr TCY. The heat age resistance of the vulcanizates cured with the 2 kinds of curing systems was good, and the retentions of the tensile strength and elongation at break were 100% and 70%, respectively.