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首页> 外文期刊>Macromolecular reaction engineering >Functionalization of Polypropylene by the Combination of Metallocene Catalysts and Reactive Comonomers
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Functionalization of Polypropylene by the Combination of Metallocene Catalysts and Reactive Comonomers

机译：茂金属催化剂和活性共聚单体组合聚丙烯的官能化

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This paper summarizes a functionalization approach that can prepare functional PP with desirable molecular structures, including functional groups, microstructures, high molecular weight, and narrow molecular weight and composition distributions. A newly-developed catalysis technology with several designed “reactive” comonomers to circumvent the inevitable deactivation of the transition metal cationic active site by functional groups in the direct polymerization process has been applied. The reactive comonomers, containing organoborane, benzylic protons (ϕ-CH3), and styrene moieties exhibit three essential properties, including (a) stability with the active site, (b) solubility in the polymerization media, and (c) versatility for interconversion to desirable functional groups under mild reaction conditions. With proper choice of metallocene catalysts, they resemble to high a-olefin monomers and can be effectively incorporated into the PP structure. In addition to the interconversion of the incorporated reactive sites to the desirable functional groups in PP copolymers, some reactive sites have been also transformed into “living” radical or anionic initiators to initiate graft-from polymerization of polar monomers to obtain PP graft copolymers.
机译：本文总结了能够用理想的分子结构制备功能性PP的官能化方法，包括官能团，微观结构，高分子量和窄的分子量和组成分布。已经施加了一种新开发的催化技术，具有几种设计的“反应性”共聚单体，以规避直接聚合过程中的官能团的过渡金属阳离子活性位点的不可避免的失活。含有有机氧烷，苄基质子（φ-CH3）和苯乙烯部分的反应性共聚单体表现出三种基本性质，包括（a）与活性位点的稳定性，（b）在聚合介质中的溶解度，（c）用于相互互连的（c）的多功能性在温和的反应条件下所需的官能团。 With proper choice of metallocene catalysts, they resemble to high a-olefin monomers and can be effectively incorporated into the PP structure.除了将掺入的反应性位点与PP共聚物中所需的官能团相互转化之外，还将一些反应性位点转化为“活性”自由基或阴离子引发剂以引发极性单体的聚合以获得PP接枝共聚物。

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