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首页> 外文期刊>Journal of Applied Polymer Science >Toughening of polypropylene with styrene/ethylene-butylene/styrene tri-block copolymer: Effects of reactive and nonreactive compatibilization
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Toughening of polypropylene with styrene/ethylene-butylene/styrene tri-block copolymer: Effects of reactive and nonreactive compatibilization

机译：用苯乙烯/乙烯-丁烯/苯乙烯三嵌段共聚物增韧聚丙烯：反应性和非反应性相容化的影响

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摘要

The effects of compatibilization on the toughening of polypropylene (PP) by melt blending with styrene/ ethylene-butylene/styrene tri-block copolymer (SEBS) in a twin-screw extruder were investigated. The compatibilizers used were SEBS functionalized with maleic anhydride (SEBS-g-MA), PP functionalized with acrylic acid (PP-g-AA), and bifunctional compound p-phenylenediamine (PPD). The effects of the compatibilization were evaluated through the mechanical properties as well as through the determination of the phase morphology of the blends by scanning electron microscopy. Reactive compatibilized blends show up to a 30-fold increase in impact strength compared with neat PP; likely the result of the reaction of the bifunctional compound (PPD) with the acid acrylic and maleic anhydride groups, this increase in strength rendered both morphological and mechanical stability to these blends. The addition of PPD to the blends significantly changed their phase morphologies, leading to larger average diameters of the dispersed particles, probably as a result of the morphological stabilization at the initial processing steps during extrusion, with the occurrence of chemical reactions. (C) 2002 Wiley Periodicals, Inc. [References: 28]
机译：通过在双螺杆挤出机中与苯乙烯/乙烯-丁烯/苯乙烯三嵌段共聚物（SEBS）熔融共混，研究相容化对聚丙烯（PP）增韧的影响。所用的相容剂是用马来酸酐官能化的SEBS（SEBS-g-MA），用丙烯酸官能化的PP（PP-g-AA）和双官能化合物对苯二胺（PPD）。通过机械性能以及通过扫描电子显微镜确定共混物的相形态来评估相容化的效果。与纯聚丙烯相比，反应性相容性共混物的冲击强度提高了30倍;可能是双官能化合物（PPD）与酸性丙烯酸和马来酸酐基团反应的结果，这种强度的提高为这些共混物提供了形态和机械稳定性。将PPD添加到共混物中会显着改变其相态形态，从而导致分散颗粒的平均直径更大，这可能是由于挤出过程中初始加工步骤中的形态稳定以及发生化学反应所致。 （C）2002 Wiley Periodicals，Inc. [参考：28]

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