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首页> 外文期刊>Journal of Applied Polymer Science >Fabrication of polypropylene blends with excellent low-temperature toughness and balanced toughness-rigidity by a combination of EPR and SEEPS
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Fabrication of polypropylene blends with excellent low-temperature toughness and balanced toughness-rigidity by a combination of EPR and SEEPS

机译：通过EPR和Seeps的组合，用优异的低温韧性和平衡韧性制造聚丙烯共混物的制备

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To overcome serious rigidity depression of rubber-toughened plastics and fabricate a rigidity-toughness balanced thermoplastic, a combination of styrene-[ethylene-(ethylene-propylene)]-styrene block copolymer (SEEPS) and ethylene-propylene rubber (EPR) was used to toughen polypropylene. The dynamic mechanical properties, crystallization and melting behavior, and mechanical properties of polypropylene (PP)/EPR/SEEPS blends were studied in detail. The results show that the combination of SEEPS and EPR can achieve the tremendous improvement of low-temperature toughness without significant strength and rigidity loss. Dynamic mechanical properties and phase morphology results demonstrate that there is a good interfacial strength and increased loss of compound rubber phase comprised of EPR component and EP domain of SEEPS. Compared with PP/EPR binary blends, although neither glass transition temperature (T-g) of the rubber phase nor T-g of PP matrix in PP/EPR/SEEPS blends decreases, the brittle-tough transition temperature (T-bd) of PP/EPR/SEEPS blends decreases, indicating that the increased interfacial interaction between PP matrix and compound rubber phase is also an effective approach to decrease T-bd of the blends so as to improve low-temperature toughness. The balance between rigidity and toughness of PP/EPR/SEEPS blends is ascribed to the synergistic effect of EPR and SEEPS on toughening PP. (c) 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 45714.
机译：为了克服橡胶增韧塑料的严重刚性凹陷并制造刚性 - 韧性平衡的热塑性塑料，苯乙烯 - （乙烯 - （乙烯 - 丙烯）] - 苯乙烯嵌段共聚物（Seeps）和乙烯 - 丙烯橡胶（EPR）的组合强化聚丙烯。详细研究了动态机械性能，结晶和熔化行为，结晶和熔化行为，以及聚丙烯（PP）/ EPR / Seeps共混物的机械性能。结果表明，渗流和EPR的组合可以实现低温韧性的巨大改善，而无需显着强度和刚性损失。动态力学性能和相位形态结果表明，由EPR组分和Exps的EP结构域组成的复合橡胶相的损失增加。与PP / EPR二进制混合物相比，但PP / EPR / Seeps共混物中的PP矩阵的橡胶相和Tg的玻璃化转变温度（Tg）降低，PP / EPR的脆性转变温度（T-BD）/ Seeps混合物降低，表明PP基质和复合橡胶相之间的界面相互作用增加也是减少共混物的T-BD的有效方法，以改善低温韧性。 PP / EPR / Seeps共混物的刚性和韧性之间的平衡归因于EPR的协同作用和渗透PP上的渗透。 （c）2017 Wiley期刊，Inc.J.Phill。聚合物。 SCI。 2018,135,45714。

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