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作 者:袁来深[1] 张才亮[1] 顾雪萍[1] 冯连芳[1]
机构地区:[1]浙江大学化学工程与生物工程学系化学工程联合国家重点实验室,浙江杭州310027
出 处:《浙江大学学报(工学版)》2011年第10期1862-1867,共6页Journal of Zhejiang University:Engineering Science
基 金:化学工程联合国家重点实验室资助项目(SKL-ChE-08D03);浙江省自然科学基金资助项目(Y4090319)
摘 要:以甲苯为溶剂和偶氮二异丁腈(AIBN)为引发剂,研究3-异丙烯基-α,α′-二甲基苄基-异氰酸酯(TMI)和苯乙烯(St)溶液共聚合的竞聚率和共聚产物(PS-co-TMI)的相对分子质量及分子质量分布.通过对共聚物产物的傅里叶红外(FTIR)分析,证实了在低转化率(<6%)下成功合成了PS-co-TMI.引入带荧光性官能团的9-(甲氨基-甲基)蒽(MAMA),通过紫外(UV)确定PS-co-TMI的组成;采用Kelen-Tudos正序和逆序法、YBR法和多元线性回归最小二乘法确定TMI(1)和St(2)的竞聚率为:r1=0.27、r2=0.91.凝胶滲透色谱(GPC)分析表明:TMI与St单体的加料量比增加,PS-co-TMI的相对分子质量和分子质量分布均减小.In the presence of toluene as solvent and azobisisobutyronitrile (AIBN) as initiator, the monomer reactivity ratios of 3-isopropenyl-a,d-dimethylbenzyl isocyanate (TMI) and styrene (St), and molecular weight and molecular weight distribution of as-synthesized copolymer (PS-eo-TMI) were analyzed. Fourier infrared (FTIR) analysis of as-synthesized copolymer showed that PS-co-TMI was successfully synthesized under the overall conversions less than 6 %. The copolymer composition of PS-eoTMI was determined by ultraviolet (UV) measurement with introducing 9-(methylaminomethyl) anthracene (MAMA) bearing fluorescence groups into PS-co-TMI. Using the methods of positive KelenTudos, reversed Kelen-Tudos, YBR and multiple linear regression least square, the reactivity ratios of TMI(1) and St(2) were obtained as rl : 0.27, r2 = 0.91. Gel permeation chromatography (GPC) analysis showed that the molecular weight and molecular weight distribution of PS-co-TMI decreased with the increase of TMI/St feeding ratio.
关 键 词:3-异丙烯基-α α′-二甲基苄基-异氰酸酯(TMI) 苯乙烯 9-(甲氨基-甲基)蒽(MAMA) 竞聚率 溶液共聚合
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