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《Acta Polymerica Sinica》 2006-08
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PREPARATION AND PROPERTIES OF TEMPERATURE-SENSITIVE N-ISOPROPYLACRYLAMIDE COPOLYMER MICROGELS CONTAINING FUNCTIONAL HYDROXYL GROUPS IN SIDE CHAINS

MA Xiaomei~1,TANG Xiaozhen~2(~1 School of Chemistry,Chemical Engineering and Envirenmental Science,Qingdao University,Qingdao 266071)(~2 School of Chemistry and Chemical Technology,Shanghai Jiaotong University,Shanghai 200240)  
Hydrophilic monomers polyethyleneglycol methacrylate(PEGMA) and hydroxyethyl methacrylate(HEMA) were selected to copolymerize with N-isopropylacrylamide(NIPAM) to prepare temperature-sensitive copolymer microgels containing functional —OH groups in the side chains of different lengths.Investigations on the microgels indicated that incorporation of PEGMA and HEMA have different influence on the deswelling behavior of the microgels.Incorporation of PEGMA makes the volume-phase transition temperature(VPTT) of the P(NIPAM-co-PEGMA) microgels to shift to higher temperature and the deswelling ratio of the microgels to decrease with the increase of the feed ratio.While incorporation of HEMA causes the VPTT of the P(NIPAM-co-HEMA) microgels to shift to lower temperature and the deswelling ratio of the microgels to increase first and then decrease with the increase of the feed ratio.The micogels has the largest deswelling ratio when the feed ratio of HEMA is 8 mol%.
【CateGory Index】: O631.3
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