本研究針對非極性式Polyol(priplast 1838)來合成WPU，排除軟硬段間氫鍵的影響，預期能達到高的相分離程度；並以polyol (priplast 1838)本身之性質:抗水解、抗氧化等能力，而使WPU本身能具有減少吸水性的能力。 實驗上選用的polyol為Uniqema公司所生產的priplast 1838，其本身為雙脂肪酸基單體，此Polyol具有飽和長碳鏈，且因其不具有雙鍵或參鍵，整體不易受到化學攻擊，使其具較佳的抗劣化之斥水性。目前僅有運用segment PU的部份，尚未有人用於製作WPU，所以本研究將利用此polyol為軟質段，硬質段方面用H12MDI為diisocyanate，DMPA為離子基，EDA為鏈延長劑，以不同硬質段含量(25~70%)與不同離子基含量(4~12%)的變化製出樣品來測試。 測試方面運用FTIR來得知WPU的合成特徵峰，TGA可得知其裂解溫度在230℃左右，DSC方面觀察不到吸熱峰，僅於70℃發現小peak，可能為物理老化緣故。因為離子基增加的緣故，硬質段間的排列變得鬆散，使DMA測試的結果可以看到拉伸時的溫度由180℃降至80℃；拉力測試也有同樣結果，楊式模數從869.94降至719.39。而吸水性隨離子基與硬質段含量增加而由1%增加到9%，以上結果為此研究的成果。 The study is synthesis waterborne polyurethane (WPU) by non-polar polyol (priplast 1838). Obviate the effect of hydrodic bonds between hard segment and soft segment, it’s can be reached high phase separate. By the property of polyol (priplast 1838): hydrolytic and oxidative stability, WPU can decrease the water absorbtion. The polyol is Priplast 1838 that made by Uniqema company. It’s dimerised fatty acid monomers. Because Saturated hydrocarbon and absence of ether links, it have stability against chemical attacked and hydrolytic. At present, it’s only used by segment PU. Not yet in WPU. The study is synthesis WPU by priplast 1838. Hard segment is H12MDI, ionic group is DMPA, chain extender is EDA. Made samples by change hard segment content(25~70%) and ionic group content(4~12%). In text, by using FTIR to realize peaks of WPU which known the synthesis process was done. Samples were started to decomposition at 230℃ that measured by TGA. There were not any endothermic peak in DSC, only a peak at 70℃ of physical aging. By increasing ionic group content, the less rigid structure of hard segment was formed. So the temperature of text of DMA was decreased form 180℃ to 80℃. Tensile text was the same with DMA, Younger’s modulus decreased from 869.94 to 719.39. Water adsorbtion was increasing from 1% to 9% by increasing ionic content. The result of study is shown on the here.
