橡胶技术网

合成橡胶工业
CHINA SYNTHETIC RUBBER INDUSTRY
2009 Vol.32 No.3 P.180-183

 橡胶技术网

含均匀聚氧乙烯支链的两亲性(丙烯酸丁酯-甲基丙烯酸甲酯)共聚物的结构及结晶性

刘新华　 谢洪泉　

摘　要：由聚氧乙烯(PFO)大单体、丙烯酸丁酯(BA)、甲基丙烯酸甲酯(MMA)共聚合成的产物经水及乙醚/丙酮(体积比3/7)分别萃取得取了纯化的两亲性接枝共聚物,用凝胶渗透色谱仪、红外光谱仪、核磁共振仪对接枝共聚物进行了表征,用蒸气渗透压计、膜渗透压计、X射线衍射仪及偏光显微镜研究了接枝共聚物的结构参数结晶性。结果表明，纯化后的共聚物为规整接技共聚物，平均接枝数(N_g)为9.4～10.2,接枝点间主要平均相对分子质量((M-bar_(nb))为9.1×10~3～15.2×10~3;随着共聚时间的延长,N_g有所下降,((M-bar)_(nb))有所增加,接枝共聚物的结晶度为0～49.5%,且随着PEO含量及其相对分子质量的增加而增大;接枝物呈现球晶结构,且随着PEO含量的减少,球晶变小且不规整.
关键词：聚氧乙烯;丙烯酸丁;甲基丙烯酸甲酯;两亲性共聚物;接枝;微观结构;结晶
分类号：TQ325.7 　文献标识码：A
文章编号：1000-1255(2009)03-0180-04

Structure and crystallinity of amphiphilic (butyl acrylate-methyl methacrylate)copolymers with uniform polyoxyethylene side chains

Liu Xinhua（Textile & Clothing Department,Anhui University of Technology and Science,Wuhu 241000,China）　 Xie Hongquan （Chemistry Department,Huazhong University of Science and Technology,Wuhan 430074,China）　

Abstract：Amphiphilic graft copolymers of butyl acrylate and methylmethacrylate with uniform polyoxyethylene (PEO) grafts were purified by successive extractions with water and ether/acetone (volume ratio 3/7).The purified products were characterized with gel permeation chromatography,infrared spectroscopy and 'H-nuclear magnetic resonance.Vapour pressure osmometer,membrane osmometer and X-ray diffraction analysis and polarized microscopy were used to study the structural parameters and crystallinity of the graft copolymers.The results showed that the purified copolymers were regular graft copolymers with average grafting numbers (N_g) of 9.4 - 10.2 and relative molecular mass of backbone between adjacent graft sites ((M-bar)_(nb)) of 9.1 × 10~3 - 15.2 × 10~3.With increasing copolymerization time,N_g decreased,whereas (M-bar)_(nb) increased.The crystallinity of graft copolymers was 0 -49.5% and increased with increasing PEO content and its relative molecular mass.The graft copolymer exhibited spherulite structure.The spherulites became smaller and irregular with decreasing PEO content.
Keywords：polyoxyethylene;butyl acrylate;methyl methacrylate;amphiphilic copolymer;graft;microstructure;crystallization

基金项目：国家自然科学基金资助项目(29274163).
作者简介：刘新华(1964-),男,硕士,高级工程师.已发表论文18篇.
作者单位：刘新华（安徽工程科技学院,纺织服装系,安徽,芜湖,241000）　
　　　　　谢洪泉（华中科技大学,化学系,湖北,武汉,430074）　

参考文献：

[1]徐祖顺,易昌凤.聚合物粒子[M].北京:化学工业出版社,2006:185-243.
[2]Ito K,Tsuchida H,Hayashi A,et al.Reactivity of poly(ethylene oxide) macromonomer in radical polymerization[J].Polym J,1985,17(7):827-839.
[3]Ito K,Tsuehida H,Kitano.Poly(ethylene oxide) maeromonomers (3):Solvent effect on the macromomer reactivity in radical polymerization[J].Polym Bull,1986,15(5):425-430.
[4]Wesslen B,Wesslen K B.Preparation and properties of some water-soluble comb-shaped amphiphilic polymers[J].J Polym Sci(part A):Polym Chem,1989,27(12):3915-3926.
[5]Xie Hongquan,Liu Jin,Li Hong.An improved synthetic method for preparing polyoxyethylene macormers and a study of their copolymerization with alkyl acrylates[J].J Macromol Sci Chain,1990,27(6):725.
[6]Xie Hongquan,Liu Yan.Synthesis characterization and properties of amphiphilie poly(ethy1 acrylate) with uniform polyoxyethylene grafts[J].J Appl Polym Sci,2001,80(7):903-912.
[7]Xie Hongquan,Liu Jin,Xie Dong.Some properties of three types of copolymers with uniform polyoxyethylene grafts[J].Eur Polym J,1989,25(11):1119-1123.
[8]刘新华,谢洪泉.聚环氧乙烷大单体与丙烯酸酯的三元接枝共聚[J].合成橡胶工业,2008,31(6):432-435.
[9]刘新华,谢洪泉.含均匀聚氧乙烯支链的两亲性(丙烯酸丁酯-甲基丙烯酸甲酯)共聚物的性能[J].合成橡胶工业,2008,31(5):346-349.

收稿日期：2008年4月9日

修稿日期：2008年12月14日

出版日期：2009年5月15日

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