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首页> 外文期刊>Journal of Applied Polymer Science >In situ compatibilization of a polyethylene, polypropylene, and polystyrene ternary blend through Friedel-Crafts alkylation
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In situ compatibilization of a polyethylene, polypropylene, and polystyrene ternary blend through Friedel-Crafts alkylation

机译：通过Friedel-Crafts烷基化的聚乙烯，聚丙烯和聚苯乙烯三元共混物的原位相容化

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The Friedel-Crafts alkylation reaction has been applied to reactively compatibilize a ternary blend of high-density polyethylene (HDPE), polypropylene (PP), and polystyrene (PS). The reactions were carried out in an internal mixer using varying catalyst concentrations. The resulting compatibilizer was quantified after Soxhlet extraction. In addition, p-substitution due to the grafting of alkyl groups onto the PS benzene ring was identified via nuclear magnetic resonance spectroscopy. The size of the PS domain in the reactive compositions is decreased by 80%. Moreover, the phase in which PS droplets were dispersed varied, that is, in the nonreactive blends they were found in the PP phase and in the reactive blends they shifted toward the HDPE phase. The effect of the compatibilizing agent was to improve the mechanical properties of the blend. Even with the lowest catalyst content, the properties of elongation-at-break, tensile strength, toughness, and elastic modulus showed improvements. (c) 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 48295.
机译：已施加Friedel-Crafts烷基化反应以反应性地将高密度聚乙烯（HDPE），聚丙烯（PP）和聚苯乙烯（PS）的三元共混物相容。反应使用不同的催化剂浓度在内部混合器中进行。在SOXHLET萃取后定量所得的增容剂。另外，通过核磁共振光谱法鉴定了由于烷基在PS苯环上的接枝而导致的P替代。反应性组合物中PS结构域的大小降低了80％。此外，将PS液滴分散的相变化，即，在不反应性共混物中，它们在PP相中发现，并且在其朝向HDPE相移位的反应性共混物中。相容剂的效果是改善混合物的机械性能。即使催化剂含量最低，伸长率 - 断裂，拉伸强度，韧性和弹性模量的性质也显示出改善。 （c）2019 Wiley期刊，Inc.J.Phill。聚合物。 SCI。 2019,136,48295。

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