Citation: QIU Yongxing, YU Xiaojie, FENG Linxian, YANG Shilin. SYNTHESIS AND CHARACTERIZATION OF AMPHIPHILIC GRAFT COPOLYMER CONTAINING MICROPHASE SEPARATED AND LONG POLY(ETHYLENE OXIDE) SIDE CHAIN STRUCTURES**[J]. Chinese Journal of Polymer Science, ;1993, 11(1): 67-75. shu

SYNTHESIS AND CHARACTERIZATION OF AMPHIPHILIC GRAFT COPOLYMER CONTAINING MICROPHASE SEPARATED AND LONG POLY(ETHYLENE OXIDE) SIDE CHAIN STRUCTURES**

Received Date: 6 March 1992

Acryloyl terminated Poly (ethyleneoxide)macromonomers (PEO-A) with different PEO chain lengths have been prepared by deactivation of PEO alkoxide with acryloyl chloride. A new kind of amphiphilic polystyrene-g-poly (ethylene oxide)graft copolymer containing both microphase separated and PEO side chain structures has been synthesized from radical copolymerization of PEO-A macromonomer with styrene. After careful purification by a newly-developed method called "selective dissolution', the well-defined structure of the purified copolymers was confirmed by IR,1H-NMR and GPC.Various experimental parameters controlling the copolymerization were studied in detail.The results indicated that the feed ratio of styrene to macromonomer(S/M) was the most important determining factor for the composition of the copolymers.A detailed "comb-model" was proposed to describe the molecular structure of the graft copolymers.Finally,this amphiphilic graft copolymers may readily form microphase separated structures as clearly indicated by transmission electron microscopy.
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