CAJ | 학술논문

以不稳定氯含量高的聚氯乙烯(U-PVC)和氯乙烯-溴代异丁酸烯丙酯共聚物(PVC-co-ABrMP)为大分子引发剂，使用电子转移催化再生原子转移自由基聚合(ARGET ATRP)进行丙烯酸丁酯(BA)的溶液接枝共聚。在固定CuCl2：三(2-吡啶甲基)胺：辛酸亚锡(摩尔比)时，当CuCl2用量(相对于氯乙烯链节数)小于0.1%时，BA转化率随CuCl2用量增加而明显增加；辛酸亚锡与CuCl2摩尔比大于50时，辛酸亚锡用量对聚合速率的影响较小；相同催化体系用量下，采用PVC-co-ABrMP为引发剂，可获得更高的BA转化率。通过PVC-co-ABrMP酯基水解得到PBA支链，其分子量分布指数为1.29，符合“活性”自由基聚合的特征。接枝PBA对PVC有明显的内增塑效果，PBA摩尔分数为32.75%的PVC-g-BA的玻璃化温度为8.34℃。
이불은정록함량고적취록을희(U-PVC)화록을희-추대이정산희병지공취물(PVC-co-ABrMP)위대분자인발제，사용전자전이최화재생원자전이자유기취합(ARGET ATRP)진행병희산정지(BA)적용액접지공취。재고정CuCl2：삼(2-필정갑기)알：신산아석(마이비)시，당CuCl2용량(상대우록을희련절수)소우0.1%시，BA전화솔수CuCl2용량증가이명현증가；신산아석여CuCl2마이비대우50시，신산아석용량대취합속솔적영향교소；상동최화체계용량하，채용PVC-co-ABrMP위인발제，가획득경고적BA전화솔。통과PVC-co-ABrMP지기수해득도PBA지련，기분자량분포지수위1.29，부합“활성”자유기취합적특정。접지PBA대PVC유명현적내증소효과，PBA마이분수위32.75%적PVC-g-BA적파리화온도위8.34℃。
The grafting copolymerization of butyl acrylate (BA) onto poly(vinyl chloride) (PVC) was conducted through the method of activators regenerated by electron transfer atom transfer radical polymerization (ARGET ATRP), using PVC with higher labile chlorine content (U-PVC) and vinyl chloride/allyl 2-bromo-2-methylpropionate random copolymer (PVC-co-ABrMP) as an initiator. The polymerization conversion of BA was obviously increased as CuCl2 concentration (based on number of vinyl chloride unit) increased when CuCl2 concentration was lower than 0.1%. The increase of BA polymerization rate was not obvious when Sn(EH)2/CuCl2 molar ratio exceeded 50. The greater BA polymerization rate and PBA grafting degree were achieved when PVC-co-ABrMP was used as the initiator with the same catalyst. The side PBA chains were cleaved from the ester group of PVC-co-ABrMP and the molecular weight distribution index of PBA was 1.29, verifying the “living”nature of this graft copolymerization. The grafted PBA showed good internal plasticization effect on PVC, and the glass temperature of PVC-g-BA copolymer with 32.75%(mol) PBA was reduced to 8.34℃.