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由大分子PMMA-DPE引发制备Poly(St-alt-MAn)微球
引用本文:唐天东,马育红,杨万泰. 由大分子PMMA-DPE引发制备Poly(St-alt-MAn)微球[J]. 北京化工大学学报(自然科学版), 2011, 38(1): 49-54
作者姓名:唐天东  马育红  杨万泰
作者单位:北京化工大学碳纤维及功能高分子教育部重点实验室,北京,100029;北京化工大学碳纤维及功能高分子教育部重点实验室,北京,100029;北京化工大学碳纤维及功能高分子教育部重点实验室,北京,100029
基金项目:长江学者和创新团队发展计划
摘    要:在1,1-二苯基乙烯(DPE)存在下,以甲基丙烯酸甲酯(MMA)为初始单体,偶氮二异丁腈(AIBN)为引发剂,采用本体聚合法制备出含有DPE片段的大分子引发剂PMMA-DPE;然后以PMMA-DPE 为引发剂,以苯乙烯(St)和马来酸酐(MAn)为共聚单体,乙酸异戊酯为溶剂,采用自稳定沉淀聚合法制备了单分散的聚(苯乙烯-马来酸酐)(Poly(St-alt-MAn))的微球。研究了 PMMA-DPE 的用量对聚合物微球的形态、粒径大小及分布的影响。采用 FT-IR, UV-Vis, 1H-NMR和 GPC 对产物的结构进行了表征,并用 SEM 观察了聚合物微球的形貌。结果表明,PMMA-DPE 能够引发 St 和 MAn 的共聚合,随着 PMMA-DPE用量的增加,聚合反应的转化率呈增大趋势,聚合物微球的粒径呈下降趋势,而粒径分布系数略有增大。

关 键 词:1  1-二苯基乙烯  大分子引发剂  自稳定沉淀聚合  苯乙烯/马来酸酐  微球
收稿时间:2010-04-19

Preparation of poly (styrene-alt-maleic anhydride) microspheres initiated by the poly (methyl methacrylate) oligomer containing 1,1-diphenylethene units
TANG TianDong,MA YuHong,YANG WanTai. Preparation of poly (styrene-alt-maleic anhydride) microspheres initiated by the poly (methyl methacrylate) oligomer containing 1,1-diphenylethene units[J]. Journal of Beijing University of Chemical Technology, 2011, 38(1): 49-54
Authors:TANG TianDong  MA YuHong  YANG WanTai
Affiliation:Key Laboratory of Carbon Fiber and Functional Polymers, Ministry of Education, Beijing University of Chemical Technology, Beijing 100029, China
Abstract:Poly(methyl methacrylate)(PMMA) oligomers containing 1,1-diphenylethene(DPE) structural units(PMMA-DPE) have been prepared by the bulk polymerization of methyl methacrylate(MMA) in the presence of DPE with azodiisobutyronitrile(AIBN) as initiator.Narrow-disperse poly(styrene-alt-maleic anhydride) [poly(St-alt-MAn)] microspheres were subsequently obtained by metastable precipitation polymerization of styrene(St) and maleic anhydride(MAn) initiated by the PMMA-DPE,with isoamyl acetate as solvent.The structure of the copolymer was confirmed by FT-IR,UV-Vis and 1H-NMR spectroscopy and GPC.The morphology and size of the microspheres were observed by SEM.The effects of varying the amount of PMMA-DPE on the morphology,particle size and size distribution of the microspheres were investigated.When the mass percentage of PMMA-DPE (based on total monomer amount) increased,the conversion increased and the diameter of the microspheres decreased,but the distribution of diameter increased slightly.
Keywords:1,1-diphenylethene  macroinitiator  metastable precipitation polymerization  styrene/maleic anhydride  microspheres
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