本研究乃利用硝酸銨鈰（CAN）和過硫酸鉀（KPS）兩種起始劑，合成玉米澱粉與醋酸乙烯酯之接枝共聚合物 （Starch-PVAc copolymer），並藉著聚醋酸乙烯酯之醇解而得到澱粉-聚乙烯醇共聚合物。研究發現不同的起始系統會影響單體總轉化率，以硝酸銨鈰起始時初期單體反應較快，但以過硫酸鉀起始之最終總轉化率較高。而接枝聚合所得之接枝比值及接枝效率亦有不同之結果。另外，經由醇化後可獲得緻密且具有相當韌性之澱粉-聚乙烯醇薄膜，此具有生物分解性的產物將有更多應用之潛力。 In this study, cerium ammonium nitrate (CAN) and potassium persulfate(KPS) were used to initate the polymerization of vinyl acetate (VAc)monomer onto corn starch. Then the emulsion solution of starch- PVAcwas alcoholized to obtain starch-PVOH. It was found that at first therate of monomer conversion was faster for a CAN system. However, theequilibrium conversion attained was lower than that of a KPS system.Not only the monomer conversion, but also the grafting ratio andgrafting efficiency were quite different in both systems. In addition,a dense and flexible starch-PVOH film capable of biodegradable wasobtained, which may target some potential application.
關聯:
第二十四屆高分子研討會論文專輯2001=Proceediings of the 24th ROC Polymer Symposium 2001，頁779-780
