缩合型硅橡胶发泡配方优化及保温性能研究

摘要

The effects of foaming agent,additive and curing agent content on tensile strength,rupture elon-gation and apparent density of foaming silicone were studied by the orthogonal experiment.The optimal for-mula for foaming silicone were 100 copies of base adhesives,3 copies of foaming agents,2 copies of addi-tives,and 2.5 copies of curing agents.The related mechanical properties and thermal properties of the above four formulae were investigated by scanning electron microscopy(SEM),multifunctional tensile ma-chine,and hot disc instrument.Results presented that the optimum formula had moderate mechanical prop-erties,well defined and dispersed inner pores,and desired thermal insulation performance.%采用正交试验，考察发泡剂用量、发泡助剂用量、固化剂用量对缩合型泡沫硅橡胶拉伸强度、断裂伸长率、表观密度性能指标的影响，得到发泡硅橡胶的最优配方为基胶100份、发泡剂3份、发泡助剂2份、固化剂2．5份．利用扫描电子显微镜、万能机械拉力机、导热系数测定仪对几个配方样品进行结构和性能测试，结果表明：最优配方的样品其力学性能适中，内部微小气室分布致密均匀，具备较为理想的隔热保温性能．