含吡咯烷酮基的衣康酸酯类聚合物不同酯基对其若干性质的影响

SYNTHESIS AND PROPERTIES OF ITACONATE HAVING PYRROLIDINONYL MOIETY

含吡咯烷酮基的衣康酸酯类聚合物不同酯基对其若干性质的影响潘怀忠阎雁唐莉吴志强李福绵（北京大学化学学院北京１００８７１）关键词含吡咯烷酮基的衣康酸酯，折光指数，热性质，平衡吸水率吡咯烷酮基具有良好的亲水保湿性和生物相容性，将其引入聚合物具有其实际应用...

A series of itaconate monomers, e.g. 4 Methyl 1 (2 pyrrolidinonylethyl) itaconate (PyEMI), 4 i Propyl 1 (2 pyrrolidinonylethyl) itaconate (PyEPrI), 4 n Butyl 1 (2 pyrrolidinonylethyl) itaconate (PyEBuI),4 Benzyl 1 (2 pyrrlolidinonylethyl) itaconate (PyEBzI) and 4 (2 Phenylethyl) 1 (2 pyrrlolidinonylethyl) itaconate (PyEPhEI)) were synthesized by reaction of 1 (2 hydroxyethyl) 2 pyrrolidinone with corresponding itaconic monoester chlorides. They were polymerized by photo initiated free radical polymerization. The properties of the monomers and polymers were characterized by GPC, DSC, TGA, swelling ratio and refractive indices. The molecular weights of the polymers may reach 1～2×104. The refractive indexes of P(PyEBzI), P(PyEPhEI) are larger then those of P(PyEMI),P(PyEPrI) and P(PyEBuI). The EWC values of P(PyEBzI), P(PyEPhEI) are also higher than those of P(PyEPrI) and P(PyEBuI) but The EWC value of P(PyEMI) is up to 89%. The decomposition temperatures of P(PyEMI),P(PyEEI),P(PyEBuI) and P(PyEpHEI) are higher than those of p(PyEPrI) and P(PyEBzI), due to the steric hindrance effect.