邱文英2006-07-252018-06-282006-07-252018-06-282000http://ntur.lib.ntu.edu.tw//handle/246246/12365本研究利用熱裂解型及氧化還原型起始劑，將單體共聚合到幾丁聚醣上;探討不同起始劑及幾丁聚醣的含量，對反應機 構、動力及聚合物性質的影響。實驗結果發現由過硫酸鉀(KPS)起始甲基丙烯酸甲酯(MMA)的聚合反應為乳化聚合，聚合反 應速率隨著幾丁聚醣含量的增加而增加，聚合體的結構為嵌段共聚合體。而由硝酸銨鈰(CAN)起始醋酸乙烯酯(VAc)之反應 為分散相聚合反應。聚合體的結構為接枝共聚合體。兩個系統的顆粒表面都富含帶正電的幾丁聚醣分子鏈。幾丁聚醣不僅參 與聚合反應，而且作為界面活性劑。In this study, thermal dissociation initiator and redox initiator were both used to initiate the polymerization of monomer onto chitosan. The reaction mechanism, kinetics, structures and thermal properties of the copolymers were studied. It was found that when potassium persulfate (KPS) was used to initiate the polymerization of MMA onto chitosan, an emulsion was obtained with a block copolymer structure. While cerium ammonium nitrate was used for the polymerization of vinyl acetate onto chitosan, a stable dispersion system was obtained with a grafted copolymer structure. In both systems, the surface of the latex particles was found to be rich in the chitosan. The chitosan molecules not only took part in the copolymerization, but also served as a role of surfactant, which provided the stability of dispersion particles.application/pdf61418 bytesapplication/pdfzh-TW國立臺灣大學材料科學與工程學研究所幾丁聚醣接枝共聚合體嵌段共聚合體過硫酸鉀硝酸銨鈰chitosangraft copolymerblock copolymerpotassium persulfatecerium ammonium nitratereporthttp://ntur.lib.ntu.edu.tw/bitstream/246246/12365/1/892216E002008.pdf