Synthesis and Characterization of GAP-PEG
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Copolymers
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小孩看的电影期刊名称： International Journal of Polymeric Materials & Polymeric Biomaterials 作者： Mohan, Y. Murali,Raju, M. Padmanabha,Raju, K. Mohana
年份： 2005年
期号： 第7期
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关键词： glycidylazide polymer or poly(glycidylazide);poly(ethylene glycol);ring-opening polymerization;thermal decomposition
摘要：A ries of glycidylazidepoly(ethylene glycol) (GAP-PEG) copolymers were synthesized by cationic ring-opening polymerization of epichlorohydrin (ECH) in the prence of poly(ethylene glycol) (PEG) using borontrifluoride etherate (BF3-etherate) as catalyst, followed by the conversion of the CH2Cl groups of
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poly(epichlorohydrin) (PECH) to CH2N3 groups. The formation of PECH-b-PEG-b-PECH triblock copolymers was confirmed by IR, 1H NMR, and 13C NMR spectroscopy. The corresponding GAP-b-PEG-b-GAP triblock copolymers were characterized by UV, IR, 1H NMR, and 13C NMR spectroscopy. The copolymers have shown an increment in their molecular weights as the higher analogue molecular weight PEGs were ud in the polymerizations. The thermogravimetry-differential thermogravimetry (TG-DTG) and differential scanning calorimetry (DSC) studies of
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