低发泡倍率硅橡胶海绵结构及性能的影响因素  

Structure and Properties of Silicone Rubber Sponge with Low Blowing Ratio and its influencing Factors

作　　者：雷卫华[1] 冯敏[1] 陈立新[1] 罗世凯[1] 

机构地区：[1]中国工程物理研究院化工材料研究所,四川绵阳621900

出　　处：《特种橡胶制品》2011年第2期40-44,共5页Special Purpose Rubber Products

摘　　要：简要介绍了过氧化二苯甲酰硫化的低发泡倍率硅橡胶海绵胶料的配方、制备方法、海绵结构及力学性能。结果表明,硫化剂用量、硫化助剂、发泡温度、胶料可塑度和生胶相对分子质量对海绵硫化发泡效果的影响较大。硫化助剂会影响海绵的硫化返原,而胶料温度对海绵密度和硬度有一定的影响。低发泡倍率海绵为典型的闭孔结构,海绵压缩量大,模量低,拉伸强度低(<0.8MPa),伸长率高,压缩永久变形小,应力伸长率大,回弹性优。The formula,preparation methods,sponge structure and mechanical properties of silicone rubber sponge compounds,cured by benzoyl peroxide,with low blowing ratio were briefly introduced.The results showed that the effects of dosage of curing agent,co-agent,blowing temperature,plasticity and rubber molecule weight on the vulcanization and blowing effects were significant.Co-agents could influence the degree of vulcanization-reversion of the sponge compounds,while the compounds temperature affected the sponge density and its hardness to some extent.The silicone rubber sponge with low blowing ratio had closed pore structure,and behalved with high compression deformation,low modulus and tensile strength,long elongation at break,low compression set,high relaxation rate and good resilience.

关 键 词：低发泡倍率 硅橡胶海绵 泡孔结构 

分 类 号：TQ337.3[化学工程—橡胶工业]