POE/硅橡胶热塑性弹性体的力学性能及加工性能研究

采用动态硫化方法制备了乙烯-丙烯共聚物(POE)/硅橡胶热塑性弹性体。考察了共混比和交联剂含量对POE/硅橡胶热塑性弹性体的力学性能以及流变加工特性的影响。结果表明,m(硅橡胶)/m(POE)为60/40,交联剂质量分数为2.5%时表现出优越的力学性能,拉伸强度达到9.8MPa,断裂伸长率达到740%。制备出的POE/硅橡胶在流变测试中表现出优越的流变性能,具有高剪切粘度低,低剪切粘度高的特点。

Mechanical and rheological properties of dynamically vulcanized thermoplastic elastomers based on POE and silicone rubber

In this study,the blends of polyolefin elastomer（POE）and silicone rubber thermoplastic elastomer have been prepared by dynamical vulcanization. The effects of blending ratio, the quantity of crosslinking agent on the mechanical properties and rheological property of POE/silicone rubber ther- moplastic elastomer were investigated. The results showed that the POE/silicone rubber thermoplastic elastomer has best mechanical properties when the blending ratio is 60/40, the quantity of crosslinking agent is 2. 5% ：tensile strength is 9.8 MPa, tensile elongation yield is 740%. The prepared POE/sili- cone rubber thermoplastic elastomer shows having superior rheological property,low viscosity in high shear and high viscosity in low shear.