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    Please use this identifier to cite or link to this item: http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/19533


    Title: A cross self-curing system for an aqueous-based PU hybrid
    Authors: Lai, Jian-zei;Chen, Pao-jan;Yeh, Jen-taut;Chen, Kan-nan
    Contributors: 淡江大學化學學系
    Keywords: self-curing;PU hybrid;aziridine
    Date: 2005-07-15
    Issue Date: 2009-11-04 16:56:41 (UTC+8)
    Publisher: John Wiley & Sons
    Abstract: Isocyanate (NCO)-terminated polyurethane (PU) prepolymer comprises carboxylic acid, which is obtained from a conventional PU preparation procedure. Aziridine-terminated PU oligomer is prepared by an addition reaction of aziridine to NCO-terminated PU prepolymer after it is neutralized with triethylamine. This PU oligomer is then dispersed with water and becomes a single-component self-curable aqueous-based PU dispersion (PU-AZ). PU carboxyl groups are not only the ionic centers stabilizing the aqueous polymer dispersion, but also serve as PU curing sites toward the curing reaction with its aziridine terminal groups on drying. This self-curable PU-AZ dispersion is miscible and compatible with other carboxyl groups containing aqueous-based PU dispersion in any ratio, which results in a cross self-cured PU hybrid formation on drying. This cross self-cured PU hybridization process allows property modification and the curing of PU simultaneously without the addition of any external curing agent.
    Relation: Journal of Applied Polymer Science 97(2), pp.550-558
    DOI: 10.1002/app.21774
    Appears in Collections:[化學學系暨研究所] 期刊論文

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