【摘要】 利用聚氧乙烯大分子单体为功能单体 ,与苯乙烯悬浮共聚 ,合成具有两亲结构 ,平均粒径在 5μm～ 35μm的微球 ,用扫描电镜 (SEM)对微球的形貌、粒径及粒径分布进行表征 ;聚合物的结构及组成分别用红外光谱和元素分析仪测定 ;微球表面及内层的聚氧乙烯含量根据 X光电子能谱 (XPS)测得的氧含量计算得到 ,结果表明聚氧乙烯在表面层的含量明显高于内层及平均值 ;用滴定法测定了微球中羟基的含量 ,改变反应条件 ,可合成羟基含量在 0 .0 5 mmol/ g～ 0 .2 mmol/ g的两亲微球更多还原

【Abstract】 Amphiphilic microspheres ranging from 3 μm to 35 μm were prepared by suspension copolymerization of styrene with poly(ethylene oxide) vinylbenzyl(PEO VB) macromonomer by changing polymerization conditions. The morphology, size and size distribution of amphiphilic microspheres were characterized by scanning electron microscopy. The structure of copolymer was confirmed by infrared spectroscopy, the content of PEO contained in the microspheres was determined using elemental analyzer and X ray photonelectron spectroscopy, it was found the PEO content on surface of microspheres is higher than the inter′s. The content of hydroxyl group( -OH ) localized in the microspheres was determined by titration.更多还原