聚丙烯/有机硅橡胶热塑性弹性体的制备及性能
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摘要
采用动态硫化法制备了聚丙烯(PP)/有机硅橡胶(SR)动态硫化热塑性弹性体(TPV),考察了PP/SR的质量比对PP/SR TPV的力学性能、流变行为及结晶行为的影响。结果表明,PP/SR TPV在动态硫化前后微观结构发生了由双连续相结构向"海-岛"结构的转变。随着SR用量的增加,PP/SR TPV的拉伸强度、扯断伸长率及撕裂强度下降;体系的结晶焓下降,PP相的结晶度下降,PP/SR TPV的复数黏度升高,但在高频时,SR对体系的复数黏度影响不大。
Dynamic vulcanization thermoplastic elastomer(TPV) composed of polypropylene(PP) and silicone rubber(SR) were prepared by dynamic vulcanization method. And the effect of PP/SR mass ratio on the mechanical property, rheological beha-vior and crystallization behavior of PP/SR TPV were investigated. The results showed that the morphology of PP/SR blends changed from bi-continuous to sea-island structure before and after dynamic vulcanization. With increasing amount of SR, the tensile strength, elongation at break, tear strength, crystallization enthalpy of system and crystallinity degree of PP decreased. The complex viscosity of PP/SR TPV increased, but SR had little effect on the complex viscosity of the system at high frequency.
Dynamic vulcanization thermoplastic elastomer(TPV) composed of polypropylene(PP) and silicone rubber(SR) were prepared by dynamic vulcanization method. And the effect of PP/SR mass ratio on the mechanical property, rheological beha-vior and crystallization behavior of PP/SR TPV were investigated. The results showed that the morphology of PP/SR blends changed from bi-continuous to sea-island structure before and after dynamic vulcanization. With increasing amount of SR, the tensile strength, elongation at break, tear strength, crystallization enthalpy of system and crystallinity degree of PP decreased. The complex viscosity of PP/SR TPV increased, but SR had little effect on the complex viscosity of the system at high frequency.
引文
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[2]刘丛丛,伍社毛,张立群. 热塑性弹性体的研究进展[J]. 化工新型材料,2008,36(8):17-21.
[3]王庆海,唐颂超,陆超. 共混型PVC热塑性弹性体的开发与应用[J]. 上海塑料,2001(3):6-10.
[4]陈尔凡,韩云凤,邓雯雯,等. 动态硫化热塑性弹性体的研究进展[J]. 高分子材料科学与工程,2011,27(3):171-174.
[5]胡娅婷,冯莺,陈占勋. 动态硫化热塑性弹性体的制备与应用[J]. 弹性体,2007,17(3):71-75.
[6]吴汉光. 三元之丙橡胶/聚丙烯动态硫化热塑性弹性体的相态结构、形成机理与性能关系[D]. 北京:北京化工大学,2016.
[7]薛磊,黄艳华,苏正涛. 乙烯基硅橡胶硫化性能的研究[J]. 有机硅材料,2017,31(4):235-240.
[8]王渴,唐开菊,翟松涛,等. 动态硫化对SBS/PP热塑性弹性体的影响[J]. 弹性体,2015,25(5):35-39.
[9]张严严,侯家瑞,段咏欣,等. 丁腈橡胶/聚乳酸热塑性硫化胶:橡塑比与性能及结构的关系[J]. 世界橡胶工业,2014,41(6):4-9.
[10]江学良,蒋涛. 动态硫化EPDM/PP热塑性弹性体相态结构及其力学行为[J]. 特种橡胶制品,2000,21(2): 1-4.
[11]孙磊,佟丽莉. Cox-Merz规则和时温叠加原理在聚合物剪切黏度测量中的应用与研究[J]. 纤维复合材料,2013,30(4):8-12.