CAJ | 학술논문

采用原子转移自由基聚合一步加料的方法，以α-溴代异丁酸乙酯为引发剂，溴化亚铜/N，N，N′，N′，N″-五甲基二亚乙基三胺为催化体系，环己酮为溶剂，于70℃下进行了丙烯酸正丁酯(nBA)与丙烯酸羟乙酯(HEA)的共聚合反应。采用傅立叶变换红外光谱、核磁共振氢谱、凝胶渗透色谱和动态力学分析等对共聚物进行了表征和测试，证实了无规共聚物PnBA-co-PHEA的成功合成，且其分子量分布较窄(＜2.0)，只具有一个玻璃化转变温度，其值为-27.35℃。通过改变单体投料比来分析共聚物组成，然后由拓展的Kelen-Tüdos法计算了两种单体的竞聚率分别为rHEA=1.505和rnBA=0.894，表明PnBA-co-PHEA确为无规共聚物。
채용원자전이자유기취합일보가료적방법，이α-추대이정산을지위인발제，추화아동/N，N，N′，N′，N″-오갑기이아을기삼알위최화체계，배기동위용제，우70℃하진행료병희산정정지(nBA)여병희산간을지(HEA)적공취합반응。채용부립협변환홍외광보、핵자공진경보、응효삼투색보화동태역학분석등대공취물진행료표정화측시，증실료무규공취물PnBA-co-PHEA적성공합성，차기분자량분포교착(＜2.0)，지구유일개파리화전변온도，기치위-27.35℃。통과개변단체투료비래분석공취물조성，연후유탁전적Kelen-Tüdos법계산료량충단체적경취솔분별위rHEA=1.505화rnBA=0.894，표명PnBA-co-PHEA학위무규공취물。
Atom transfer radical polymerization (ATRP) was employed to prepare the copolymer of n-butylacrylate (nBA) and hydroxyethyl acrylate (HEA). The copolymerization reactions were carried out at 70 ℃with ethyl 2-bromoisobutyrate as the initiator,copper bromide/N,N,N′,N′,N″-pentamethyldi-ethylenetriamine as the catalyst system,and the cyclohexanone as the solvent. The copolymer products were characterized by fourier transform infrared spectroscopy,1hydrogen-nuclear magnetic resonance,gel permeation chromatography and dynamic mechanical analysis. The results show that the random copolymer PnBA-co-PGMA is successfully synthesized via ATRP,its molecular weight distribution is very narrow and it has only a glass transition temperature which is-27.35℃. Through changing the monomer feeding ratio of HEA and nBA,the composition of the copolymer was analyzed. Finally,using the extended Kelen-Tüdos method from the copolymer composition datum,the monomer reactivity ratios were calculated to be rHEA=1.505 and rnBA=0.894 respectively,which illustrates that the copolymer PnBA-co-PGMA is really a random copolymer.