教師資料查詢 | 類別: 期刊論文 | 教師: 董崇民 Don, Trong-ming (瀏覽個人網頁)

標題:Preparation of polyurethane dispersions by miniemulsion polymerization
學年94
學期1
出版(發表)日期2005/10/01
作品名稱Preparation of polyurethane dispersions by miniemulsion polymerization
作品名稱(其他語言)
著者Li, Chien-yu; Chiu, Wen-yen; Don, Trong-ming
單位淡江大學化學工程與材料工程學系
出版者Hoboken: John Wiley & Sons, Inc.
著錄名稱、卷期、頁數Journal of Polymer Science, Part A: Polymer Chemistry 43(20), pp.4870-4881
摘要With a two-step miniemulsion polymerization, hydrophobic polyurethane (PU) dispersions were prepared with a cosurfactant, the costabilizer hexadecane (HD) in the oil phase, and sodium dodecyl sulfate (SDS) in the water phase. The first step involved the formation of NCO-terminated prepolymers between isophorone diisocyanate and poly(propylene glycol) oligomer in toluene. Next, PU dispersions were produced by a miniemulsion method in which an oil phase containing NCO-terminated prepolymers, HD, the chain extender 1,4-butanediol (BD), the crosslinking agent trimethylol propane (TMP), and the catalyst dibutyltin dilaurate was dispersed in the water phase containing SDS. The influence of experimental parameters, such as the ultrasonication time, concentrations of SDS and HD, and TMP/BD and NCO/OH equivalent ratios, on the sizes of the miniemulsion droplets and polymer particles, as well as the molecular weights and thermal properties of the PU polymer, was examined. The chemical structure of the produced PU polymer was identified with a Fourier transform infrared spectrometer. The molecular weight distribution and average particle size were measured through gel permeation chromatography and dynamic light scattering, respectively. The thermal stability of the PU polymer was characterized with thermogravimetric analysis.
關鍵字Crosslinking;Dispersions;Emulsion polymerization;Molecular weight distribution;Particle size analysis;Polypropylenes;Hexadecane (HD);Miniemulsion;Oil phase;Sodium dodecyl sulfate (SDS);Polyurethanes
語言英文
ISSN1099-0518
期刊性質國外
收錄於SCI;EI
產學合作
通訊作者Li, Chien-yu; Chiu, Wen-yen
審稿制度
國別美國
公開徵稿
出版型式紙本
相關連結
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