Citation: QIU Yongxing, YU Xiaojie, FENG Linxian, YANG Shilin. CHARACTERIZATION OF AMPHIPHILIC AND MICROPHASE SEPARATED GRAFT COPOLYMERS Ⅱ SURFACE CHARACTERIZATION AND IN VITRO BLOOD-COMPATIBILITY ASSESSMENT OF POLYSTYRENE-GRAFT-ω-STEARYLPOLY (ETHYLENE OXIDE)*[J]. Chinese Journal of Polymer Science, ;1995, 13(2): 112-125. shu

CHARACTERIZATION OF AMPHIPHILIC AND MICROPHASE SEPARATED GRAFT COPOLYMERS Ⅱ SURFACE CHARACTERIZATION AND IN VITRO BLOOD-COMPATIBILITY ASSESSMENT OF POLYSTYRENE-GRAFT-ω-STEARYLPOLY (ETHYLENE OXIDE)*

Received Date: 6 December 1993

This paper reported the research results concerning the surface characterization ofpolystyrene-graft-w-stearyl poly(ethylene oxide) (PS-g-SPEO) by means of XPS,contactangle measurement and TEM, and its in vitro blood compatibility assessment by measuringthe plasma recalcification time (RT) and partial thromboplastin time (PTT). The XPSresults demonstrated that the surface and bulk composition of the PS-g-SPEO graftcopolymers differ remarkably from each other,and that SPEO component was constantly enriched at the copolymer/air interface.Contact angle studies indicated that the surface water wettability can be adjusted effectively by changing the composition of the copolymer,PS-g-SPEO graft copolymers can undergo microphase separation as clearly illustrated by TEM photographs.The relationship between the surface properties of PS-g-SPEO graft copolymer and its blood compatibility was also discussed.
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