淡江大學機構典藏:Item 987654321/50492
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    题名: A novel dispersant for preparation of high loading and photosensitive carbon black dispersion
    作者: Li, Chien-yu;Chiu, Wen-yen;Don, Trong-ming
    贡献者: 淡江大學化學工程與材料工程學系
    关键词: miniemulsion;polyurethanes;colloids
    日期: 2008-09
    上传时间: 2013-06-13 11:28:31 (UTC+8)
    出版者: Hoboken: John Wiley & Sons, Inc.
    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.
    關聯: Journal of Polymer Science, Part A: Polymer Chemistry 46(18), pp.6185-6197
    DOI: 10.1002/pola.22929
    显示于类别:[化學工程與材料工程學系暨研究所] 期刊論文

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