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    題名: Phosphorus and Nitrogen Containing Curing Agent for Aqueous- base Polyurethane System
    作者: 王大仁;陳幹男
    貢獻者: 淡江大學化學學系
    關鍵詞: 水性聚胺酯;交聯劑;阻燃劑;物理性質;機械性質;極限需氧指數;;;次乙亞胺化合物;Aqueous-Base Polyurethane;Curing Agent;Flame Retardant;Physical Property;Mechanical Property;Limited Oxygen Index;Phosphorus;Nitrogen;Aziridinyl Compound
    日期: 1996-06
    上傳時間: 2014-02-09 07:33:32 (UTC+8)
    摘要: 本實驗在探討陰離子水性PU的改質,利用次亞乙胺(aizridine)含有(-NH-)官能基與三氯氧化磷(POCl/sub 3/ Phosphorus oxychloride)合成雙官能基及四官能基具次亞乙胺基衍生物作為反應型架橋劑。次亞乙胺在低pH時具有高反應性、高架橋性含磷、氮元素。利用空氣中二氧化碳降低水性 PU的pH值使次亞乙胺與羧酸(-COOH)形成交聯反應。此化合物可具有架橋和阻燃的雙效功能架橋劑。此添加架橋劑在水性PU於開放系統中不同 pH值粒徑及界達電位的變化。PU在室溫成膜後用萬能拉力機測試抗張強度、伸長率、極限斷裂強度及伸長度。並由膠含量、吸水率及吸水損失率、95%酒精吸收率、動態機械分析儀來比較架橋前後性質的改變、接觸角觀察膜表面親、疏水性。並利用環氧樹脂的親油性質滲入水性PU微胞內與胺基架橋另外加入親水性的磷氮架橋劑使微胞與微胞問也產生交聯以達到雙重架橋效果。在阻燃效果方面以極限需氧指數(L.O.I.)作為測試指標。
    Aziridine reacted with phosphorus oxychloride and form a di- or tetra-aziridinyl and phosphorus containing compound. Aziridine is reactive toward the carboxylic group under a lower pH conditions. These synthesized di- or tetra- aziridinyl compounds could play the dual-function as a reactive flame-retardant as well as a cross-linker for anionic aqueous-based PU ionomers. Furthermore, epoxy resin was applied as a secondary curing agent for the system. The particle size distributions and zeta potential of PU dispersions before and after the treatment of these curing agents were monitored at ambient temperature. The physical and mechanical properties of PU films were evaluated before and after the curing reactions, such as, gel content, water- or alcohol-uptake, contact angle, tensile strength and elongation. And their thermal properties were also investigated by thermogravimetric analysis, dynamic mechanical analysis and limited oxygen index measurement.
    關聯: 第十九屆高分子研討會論文專輯第十二卷第二冊=Proceedings of the 19th ROC Polymer Symposium 1996
    顯示於類別:[化學學系暨研究所] 會議論文

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