以環氧樹脂(DGEBA)在常壓下通入二氧化碳進行親核開環反應得到環狀碳酸酯Bis(cyclic carbonate)，再以具有聚二甲基矽氧烷(PDMS)的胺類化合物進行聚合反應，使形成主鏈段上掛有羥基的聚胺基甲酸酯(Hydroxyl PU)。再利用PU上的羥基與琥珀酸酐(Maleic anhydride)進行半酯化反應後，使其PU鏈段懸掛羧酸基，因而此新型水性PU樹脂能夠穩定分散於水中，即所謂水性PU分散液(Aqueous-based Polyurethane Dispersion)。最後使用架橋劑(TMPTA-AZ)使水性PU樹脂成為網狀交聯之結構，測量並討論其物理與熱性質。 Bis(cyclic carbonate) were prepared from the DGEBA reacted in the atmospheric pressure of CO2 . And then, use the polydimethy siloxane(PDMS) which included the amino group to afforded corresponding poly(hydroxyurethane)s. Half-esterification between these pendent hydroxyl groups and maleic anhydride could lead to new pendent groups, carboxylic groups. The carboxylic group could play the role of internal emulsifier that could dispersed steadily in the water, named aqueous-based polyurethane dispersion. Adding different ratio of bridging agent TMPTA-AZ(trimethylolpropane triacrylate-aziridine) into the WPU dispersion, would lead to cure by cross-linking. We discussed the properties of physics, thermal stability, dynamic mechanics in this research.
