聚苯乙烯微球表面的链段堆积状态

聚苯乙烯微球表面的链段堆积状态徐伟，陈殿勇，华中一，吕绪良，胡建华，府寿宽（复旦大学材料科学系，上海，２００４３３）（复旦大学高分子科学系）关键词聚苯乙烯微球，聚合物链段，聚集态，扫描隧道显微镜用微乳液聚合法制备的聚苯乙烯微球与常规聚苯乙烯相比有许多...

The Stacked Polymer Chains on the Surfaces of Polystyrene Microparticles

Polystyrene microparticles prepared by microemulsion free-radical polymerization,have been found to be much different from ordinary polystyrene,but their structures still remain unknown,Therefore we use the scanning tunneling microscope (STM) to investigate them.It is found that at least in some regions of the polystyrene surface,the polymer chains are orderly stacked without entanglement.It is also found that the oagulation of polymer chains can be varied with different regions. The existence of the orderely-stacked polymer chains might be the reason why the polystyrene microparticles have different properties from the ordinary atactic polystyrene.