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首页> 外文期刊>Journal of Applied Polymer Science >Morphology, rheology, and mechanical properties of dynamically cured EPDM/PP blend: Effect of curing agent dose variation
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Morphology, rheology, and mechanical properties of dynamically cured EPDM/PP blend: Effect of curing agent dose variation

机译：动态固化EPDM / PP共混物的形态，流变学和力学性能：固化剂剂量变化的影响

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摘要

The structure development, rheological behavior, viscoelastic and mechanical properties of dynamically cured blend based on the ethylene-propylene-diene terpolymer (EPDM) and polypropylene (PP) with a ratio of 60/40 by weight were studied. The variation of two-phase morphology was observed and compared as the level of curing agent was increased. Meanwhile, as the level of curing agent increased, viscosity as a function of shear stress always increased at a shear stress range of 2.2 X 10(4) to 3.4 x 10(5) Pa at the temperature of 200degreesC, yet viscosity of the blend approached each other at high shear stress. Dynamic mechanical spectra at different temperatures show that dynamic modulus (E') of the blend exhibits two drastic transitions corresponding to glass transition temperature (T-g) of EPDM and T-g of PP respectively. In the blends T(g)s of EPDM increase and T(g)s of PP almost remain unchangeable with an increase in curing agent level. Tensile strength increased, yet elongation at break decreased as the level of curing agent is increased. (C) 2004 Wiley Periodicals, Inc. J Appl Polym Sci 92: 357-362,2004. [References: 25]
机译：研究了基于比例为60/40的乙烯-丙烯-二烯三元共聚物（EPDM）和聚丙烯（PP）的动态固化共混物的结构发展，流变行为，粘弹性和机械性能。观察并比较了随着固化剂含量的增加，两相形态的变化。同时，随着固化剂含量的增加，在200 X的温度下，剪切应力范围为2.2 X 10（4）至3.4 x 10（5）Pa时，粘度作为剪切应力的函数始终会增加，而共混物的粘度在高剪切应力下彼此接近。在不同温度下的动态力学光谱表明，共混物的动态模量（E'）表现出两个剧烈的转变，分别对应于EPDM的玻璃化转变温度（T-g）和PP的T-g。在共混物中，EPDM的T（g）增加，而PP的T（g）随着固化剂含量的增加几乎保持不变。拉伸强度增加，但断裂伸长率随着固化剂含量的增加而降低。 （C）2004 Wiley Periodicals，Inc.J Appl Polym Sci 92：357-362，2004。 [参考：25]

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