高校化学工程学报
高校化學工程學報
고교화학공정학보
JOURNAL OF CHEMICAL ENGINEERING OF CHINESE UNIVERSITIES
2015年
1期
247-251
,共5页
黄文艳%张俊%张东亮%陈建海%杨扬%杨宏军%薛小强%郭金龙%蒋必彪
黃文豔%張俊%張東亮%陳建海%楊颺%楊宏軍%薛小彊%郭金龍%蔣必彪
황문염%장준%장동량%진건해%양양%양굉군%설소강%곽금룡%장필표
链转移剂单体%支化聚苯乙烯%乳液聚合
鏈轉移劑單體%支化聚苯乙烯%乳液聚閤
련전이제단체%지화취분을희%유액취합
chain transfer monomer%branched polystyrene%emulsion polymerization
以α-甲基丙烯酸-3-巯基己酯(MHM)为链转移剂单体，过硫酸钾(PPDS)为引发剂，十二烷基苯磺酸钠(LAS)为乳化剂，通过乳液聚合合成支化聚苯乙烯。采用核磁共振氢谱(1H-NMR)和三检测体积排除色谱(TD-SEC)对支化聚苯乙烯进行了表征分析。结果表明：乳液聚合可以合成较窄分子量分布的高分子量支化聚苯乙烯(Mw.MALLS=2.18×106 g?mol?1，PDI =4.42)，且表现出很高的支化程度。
以α-甲基丙烯痠-3-巰基己酯(MHM)為鏈轉移劑單體，過硫痠鉀(PPDS)為引髮劑，十二烷基苯磺痠鈉(LAS)為乳化劑，通過乳液聚閤閤成支化聚苯乙烯。採用覈磁共振氫譜(1H-NMR)和三檢測體積排除色譜(TD-SEC)對支化聚苯乙烯進行瞭錶徵分析。結果錶明：乳液聚閤可以閤成較窄分子量分佈的高分子量支化聚苯乙烯(Mw.MALLS=2.18×106 g?mol?1，PDI =4.42)，且錶現齣很高的支化程度。
이α-갑기병희산-3-구기기지(MHM)위련전이제단체，과류산갑(PPDS)위인발제，십이완기분광산납(LAS)위유화제，통과유액취합합성지화취분을희。채용핵자공진경보(1H-NMR)화삼검측체적배제색보(TD-SEC)대지화취분을희진행료표정분석。결과표명：유액취합가이합성교착분자량분포적고분자량지화취분을희(Mw.MALLS=2.18×106 g?mol?1，PDI =4.42)，차표현출흔고적지화정도。
Branched polystyrene was prepared through emulsion polymerization, using 3-mercapto-hexyl methacrylate (MHM) and potassium peroxydisulfate (PPDS) as the chain transfer monomer and the initiator, respectively. The branched polystyrene was characterized by proton nuclear magnetic resonance (1H-NMR), and the triple detection size exclusion chromatography (TD-SEC) was used to determine monomer conversion, molecular weight, branching degree and viscosity. It was proved that branched polystyrene prepared via emulsion polymerization not only has much higher molecular weight, but also exhibits relatively narrow molecular weight distribution (Mw.MALLS= 2.18×106 g?mol?1,PDI = 4.42) compared with those prepared through solution or suspension polymerization (Mw.MALLS= 731900 g?mol?1,PDI = 7.87). Moreover, the prepared branched polystyrene shows higher branching degree as indicated by the compact factor ofMw.MALLS/Mw.SEC .
