摘要
本研究以新戊酸乙烯酯(VPi)为单体,偶氮二异(N-胺乙基)丁脒(ABEA)为引发剂,十二烷基硫酸钠(SDS)为乳化剂,通过低温乳液聚合法合成了高相对分子质量和高立构规整度的聚新戊酸乙烯酯(PVPi).讨论了反应温度、引发剂浓度和乳化剂浓度等因素对聚合物相对分子质量的影响.聚合物PVPi的结构用红外光谱进行了表征,相对分子质量和立构规整度分别用凝胶渗透色谱和核磁共振氢谱进行了表征.所制得的PVPi的平均聚合度为6 300,间同立构规整度为86.5%.
High molecular weight （HMW） and syndiotactic-rich poly[（vinyl pivalate） （PVPi）] was synthesized by emulsion polymerization, using Vinyl pivalate （VPi） as monomer, 2,2＇-azobis[2-methyl- N-（2-aminoethyl） propionamide] as initiator, dodecy[ sodium sulfate （SDS） as emulsifier. The effect conditions on molecular weight of PVPi were discussed in detail, such as the polymerized temperature, the concentration of initiator, the ratio of oil to water and the concentration of emulsifier concentration etc. At last, the structure of PVPi was characterized by IR, molecular weight and syndiotacticity was characterized respectively by GPC and 1HNMR. The results show that the number-average degree of polymerization of PVPi is 6300 and syndiotacticity is 86.5%.
出处
《中北大学学报（自然科学版）》
CAS
北大核心
2009年第1期50-54,共5页
Journal of North University of China(Natural Science Edition)
