The effect of 2-hydroxyethyl methacrylate on the physical property of water soluble PU Resin

• Main Authors: ChengYU Chen, 陳振宇
• Other Authors: YangMing Kuo
• Format: Others
• Language: zh-TW
• Published: 2006
• Online Access: http://ndltd.ncl.edu.tw/handle/49017483826858310385

碩士 === 中國文化大學 === 應用化學研究所 === 94 === 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.