甲苯二異氰酸酯與聚酯，2-hydroxyethyl methacrylate及其他添加劑反應成水性PU樹脂之分子結構己經IR光譜證實，實驗數據顯示水性PU數之分子之平均粒徑會隨2-hydroxyethyl methacrylate濃度之增高而變大，這是因為水性PU數之分子之自由體積變大之故。水性PU樹脂溶液之黏度似乎也會隨著2-hydroxyethyl methacrylate濃度之增高而變大，原因也是因為水性PU樹脂分子之自由體積變大之故。至於水性PU樹脂溶液之表面張力會隨2-hydroxyethyl methacrylate濃度之增高而變大，這是因為水溶液表面上的非極性基排列較整齊之故
水性PU樹脂薄膜之拉硬力會隨2-hydroxyethyl methacrylat濃度增高而略為變大，這是因為水性PU分子與分子間的作用力增強，而使得水性PU樹脂分子的架橋力增強之故。不過，水性PU樹脂薄膜之伸長率卻會隨2-hydroxyethyl methacrylat濃度增高而變小，這是因為水性PU樹脂分子本身的作用力增強之故。
The reaction of toluene diisocyanate with polyester, 2-hydroxyethylmethacrylate and other additives to form the structure of water-based polyureythane(PU) resin molecule has been proven by IR spectra. Experimental date showed that the average particle size of the water-based PU resin in water increased with increasing concentration of 2-hydroxyethyl methacrylate. This may be due to the result of increased free volume of the PU resin molecule. In aqueous solution, the viscisty of the water-based PU resin molecule also appeared to increase with an increase of 2-hydroxyethyl methacrylate concentration, as a result of increased free volume of the water-based PU resin molecule. For water-based PU resin in water, the surface tensin was seem to increase with increasing concentration of 2-hydroxyethylmethacrylate. This may be attributed to the hydrophobics effect of the PU resin molecule adsorbed at the surface of the water becoming even more ordered.
The tensile strength of the film made by the water-based PU resin slightly increased with increcsing concentration of 2-hydroxyethylmethacrylate. This may be due to increased crosslinking capability resulting from intermolecular interaction between water-based PU resin molecules themselves and between PU molecule and water molecule. On the other hand, however, the elongation of the file made by the water-based PU resin decreased with increasing concentration of 2-hydroxyethylmethacrylate, as a result of strong intramolecular interaction of the PU resin molecule itself.
