SYNTHESIS OF AB AND ABA TYPE PST(A)-PEO(B) BLOCK COPOLYMERS AND CHARACTERIZATION OF THEIR STRUCTURE
AB及ABA型聚苯乙烯(A)-聚氧乙烯(B)嵌段共聚物的合成及其结构的表征

AB type PSt-PEO block copolymers were successfully synthesized using a-pheny-lethyl potassium as initiator in toluene, whereas ABA type PSt-PEO block copolymer were prepared by coupling reaction of TDI with hydroxyl terminated AB type PSt-PEO block copolymers. Both AB and ABA types block copolymers of PSt-PEO were characterized by NME, IK, UV, DSC and their bulk properties investigated by X-ray dif-fraction polarization microscopy and DSC.