【摘要】 采用60Coγ射线作为辐射硫化的辐照源,制备了以纳米二氧化硅(SiO2)、纳米碳酸钙(CaCO3)等为填料的三元乙丙橡胶(EPDM)。研究了多官能团单体(PFM)、纳米填料的种类、用量等因素对橡胶力学性能的影响,并考察了纳米粒子在辐射硫化胶中的分散形态。力学性能和扫描电镜结果表明,辐射硫化胶的力学性能与纳米粒子在胶中的分散尺寸和均匀性有关。纳米SiO2粒子以较小尺寸均匀分布在硫化胶中,它对辐射硫化三元乙丙橡胶有较好的补强效果;而采用CaCO3或者二者的混合物为填料,粒子在硫化胶中的分散尺寸相对较大,因而所得辐射硫化胶力学性能不理想。更多还原

【Abstract】 Ethylene-propylene diene terpolymer（EPDM） has been vulcanized by means of ⁶⁰Co γ radiation,compounded with three kinds of paricles including nano-SiO₂,nano-CaCO₃ or nano-SiO₂/CaCO₃.The influences of polyfunctional monomer,filler category and content on the mechanical properties,and particle dispersion of radiation-vulcanized EPDM were investigated.Results indicated that the reinforcing effect of nano-SiO₂ was better than that of nano-CaCO₃ or nano-SiO₂/CaCO₃.The tensile strength,elongation break and modulus of EPDM filled with 40phr nano-SiO₂ were better,and the dispersion of particles was homogenous in matrix at the same condition.更多还原