嵌段式聚氨基甲酸酯(Segmented polyurethane，PU)擁有龐大的化學結構數目與其內部特殊的微相形態，故反應出許多多變的性質，同時也複雜化了PU形態、結構和性質的關係。為此我們希望能藉由合成完全相分離的PU彈性體，來探討此微域形態與其形態變化的交互關係。
本實驗室過去曾探討水性PU(Waterborne Polyurethane)，在其結構變化與物理性質之間的關係上有重大發現，並利用穿透式電子顯微鏡由微相結構方面著手建立水性PU三個model，此水性PU特有之雙連續相網狀結構(phase separated bicontinues network structure) ，具高透明性、高拉伸剛性、高堅韌性、耐高溫，且易於加工，本實驗將以此架構續將此高分子改質成不具水溶性，依據溶液聚合法，將硬質段改質，並維持其材料特性，期望能將此高分子帶入實用之領域。
本實驗乃是利用3-二異丙氨-1,2丙二醇
(3-Diisopropylamino-1,2-propanediol)取代水性PU之DMPA，即從硬段改質油性PU，添加3-二異丙氨-1,2丙二醇形成巨大側基(Bulky group)，藉由TEM、FTIR、DSC、DMA、TGA、拉力機，探討其結
與性質。

Segmented polyurethane possesses enormous amount of chemical structures and its Micro-phase structure could react to form a variety of properties, hence it complicates its own as well. In order to probe into the mutual actions between its properties and compositions, we synthesize the nonpolar PU elastomer into a complete whole.
Our laboratory once looked into Waterborne Polyurethane’s structural variations and physical properties and had came out with a significant discovery. With the usage of TEM(transmission electron microscope) we built up three Waterborne Polyurethane models in micro-phase-oriented aspect, its phase separated bicontinues network structure possesses the penetrability, elasticity, tenacity, being heat-proof and facile process. The experiment is to transform Waterborne Polyurethane into fat-soluble. By taking the measure of solution polymerization, that is altering the structure of hard segment , yet maintaining its material distinction. I do expect to bring it into application in the coming future.
We utilized 3-Diisopropylamino-1,2-propanediol as substitutes for the DMPA of Waterborne Polyurethane. That is adding 3-Diisopropylamino-1,2-propanediol so as to form a bulky group, to change its structure through hard segment. Afterward we study its structures and properties with TEM, FTIR, DSC, DMA,TGA and Tensile strength.

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