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首页> 外文期刊>Journal of Applied Polymer Science >Internal plasticization of poly(vinyl chloride) by grafting acrylate copolymers via copper-mediated atom transfer radical polymerization
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Internal plasticization of poly(vinyl chloride) by grafting acrylate copolymers via copper-mediated atom transfer radical polymerization

机译：通过铜 - 介导的原子转移自由基聚合通过丙烯酸酯共聚物接枝聚（氯乙烯）的内部塑化

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Internal plasticization of poly(vinyl chloride) (PVC) was achieved in one-step using copper-mediated atom transfer radical polymerization to graft different ratios of random n-butyl acrylate and 2-2-(2-ethoxyethoxy)ethyl acrylate copolymers from defect sites on the PVC chain. Five graft polymers were made with different ratios of poly(butyl acrylate) (PBA) and poly(2-2-(2-ethoxyethoxy)ethyl acrylate) (P2EEA); the glass transition temperatures (T-g) of functionalized PVC polymers range from - 25 to - 50 degrees C. Single T-g values were observed for all polymers, indicating good compatibility between PVC and grafted chains, with no evidence of microphase separation. Plasticization efficiency is higher for polyether P2EEA moieties compared with PBA components. The resultant PVC graft copolymers are thermally more stable compared to unmodified PVC. Increasing the reaction scale from 2 to 14 g produces consistent and reproducible results, suggesting this method could be applicable on an industrial scale.
机译：利用铜介导的原子转移自由基聚合，从PVC链上的缺陷部位接枝不同比例的无规丙烯酸正丁酯和2-2-（2-乙氧基乙氧基）丙烯酸乙酯共聚物，一步实现了聚氯乙烯（PVC）的内部塑化。用不同比例的聚丙烯酸丁酯（PBA）和聚丙烯酸2-2-（2-乙氧基乙氧基）乙酯（P2EEA）制备了五种接枝聚合物；功能化PVC聚合物的玻璃化转变温度（T-g）范围为-25至-50摄氏度。所有聚合物均观察到单一T-g值，表明PVC和接枝链之间具有良好的相容性，没有微相分离的证据。与PBA组分相比，聚醚P2EEA组分的塑化效率更高。与未改性的PVC相比，所得PVC接枝共聚物的热稳定性更高。将反应规模从2 g增加到14 g可产生一致且可重复的结果，表明该方法可用于工业规模。

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