苯基硅中间体对阻尼硅橡胶性能的影响

为了提高硅橡胶高温下的阻尼性能,将高苯基含量的苯基硅中间体添加到硅橡胶中,并使用硫化剂2,4-二氯过氧苯甲酰(DCLBP)与硅橡胶共硫化。通过无转子硫化仪、SEM、DMA、TG对改性硅橡胶性能进行表征。结果表明:随苯基硅中间体用量的增加,硅橡胶的硫化程度降低,硬度和拉伸强度下降,而拉断伸长率、撕裂强度和高温下的损耗因子tanδ明显提高。当添加量为15份时,硅橡胶拉伸强度为7. 75 MPa,最大损耗因子tanδmax从0. 2提高到0. 3。

Effect of Silicone Intermediates on Properties of Damping Silicone Rubber

In order to improve the damping properties of silicone rubber at high temperature,a silicon intermediate with high phenyl content is added to the silicone rubber and co-vulcanized with silicone rubber using 2,4-dichloroperoxybenzoyl(DCLBP) as vulcanizing agent. Silicone rubber were characterized by the rotorless vulcanizer,SEM,DMA and TG. The results show that with the increasmet of the amount of phenyl silicon intermediate,the degree of vulcanization of silicone rubber,the hardness and tensile strength decrease,while the elongation at break,tear strength and loss factor tanδ at high temperature are significantly improved. When the using amount is 15 parts,the tensile strength of the silicone rubber is 7. 75 MPa,and tanδmaxincreases from 0. 2 to 0. 3.