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Internal plasticization of poly(vinyl chloride) by grafting acrylate copolymers via copper‐mediated atom transfer radical polymerization
Journal of Applied Polymer Science ( IF 2.7 ) Pub Date : 2021-03-22 , DOI: 10.1002/app.50747
Longbo Li 1 , Yanika Schneider 2 , Adrienne B. Hoeglund 3 , Rebecca Braslau 1
Affiliation  

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 (Tg) of functionalized PVC polymers range from − 25 to − 50°C. Single Tg 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.

中文翻译:

通过铜介导的原子转移自由基聚合接枝丙烯酸酯共聚物对聚氯乙烯的内部增塑

聚氯乙烯(PVC)的内部增塑可通过铜介导的原子转移自由基聚合一步一步地从缺陷中接枝不同比例的无规丙烯酸丁酯和2-2-(2-乙氧基乙氧基)丙烯酸乙酯共聚物实现内部增塑PVC链上的站点。制备了五种接枝聚合物,它们分别具有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)。官能化PVC聚合物的玻璃化转变温度(T g)为-25至-50°C。单T g所有聚合物均观察到该值,表明PVC与接枝链之间具有良好的相容性,没有微相分离的迹象。与PBA组分相比,聚醚P2EEA部分的增塑效率更高。与未改性的PVC相比,所得的PVC接枝共聚物在热方面更稳定。将反应规模从2 g增加到14 g可以产生一致且可重复的结果,这表明该方法可以在工业规模上应用。
更新日期:2021-05-13
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