含氟嵌段共聚物离聚体的合成表征及其性能研究

嵌段共聚物离聚体具有独特的形态和固体及溶液性质 ,在热塑性弹性体、极性材料与非极性材料共混相溶剂和粘度调节剂等领域具有十分广阔的应用前景 ,引起了人们的普遍关注 .文献报道较多的是聚苯乙烯 乙烯 丙烯1] 、聚苯乙烯 乙烯 丁烯 苯乙烯2 ] 、聚苯乙烯 异丁烯 苯乙烯3 ] 等共聚物中 ,聚苯乙烯链段部分磺化后所得离聚体的合成与性质研究 .众所周知 ,含氟聚合物具有低表面能和高表面活性等特性 ,因而将含氟基团引入到嵌段共聚物离聚体中有望开发出一种新型的特殊功能材料 .原子转移自由基聚合 (ATRP)自 1 995年问世以来 ,已成功…

SYNTHESIS AND CHARACTERIZATION OF FLUORINE-CONTAINING BLOCK COPOLYMER IONOMERS AND THEIR PROPERTIES

Fluorine-containing block copolymer ionomers were prepared by atom transfer radical polymerization (ATRP) of 2-(perfluorononenyl)oxy]ethyl methacrylate (FNEMA) using bromine-endcapped poly(styrene)(PSt- Br) as macroinitiators,followed by partial sulfonation of the styrene blocks.The formation of the block copolymers before sulfonation was confirmed with gel permeation chromatography (GPC) and 1H-NMR.The sulfonation products were characterized by FT-IR and elemental analysis.Furthermore,their solution behavior and wettability were examined and comparied with those of the parent copolymers.The results show that the ionomers,especially the metal salt ionomers exhibit higher viscosity than that of the parent block copolymers.Although the polar groups-sulfonated groups were introduced to the copolymer,the film of the ionomer kept high hydrophobic ability.