氟化物對防水透濕水性PU接著劑物性影響之探討

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题名:	氟化物對防水透濕水性PU接著劑物性影響之探討 The effect of the Fluoro-compound on the physical property of water-resistent vapor permeable polyurethane ionomer
作者:	彭伊瑈
贡献者:	應用化學研究所
关键词:	氟化物 fluoro-compound
日期:	2006
上传时间:	2014-06-09 09:52:55 (UTC+8)
摘要:	甲苯二異氰酸酯與矽氧化合物(KBM-603)氟化合物(Fluoro-compound)與其他添加劑反應成水性PU接著劑之分子的結構，已經 FT-IR光譜證實。在水溶液中，水性PU接著劑的表面張力會隨矽氧化合物濃度之增高而變大，這是因為吸附在水溶液表面上的非極性排列較整齊之故。實驗結果顯示，水性PU接著劑的黏度和平均分子粒徑會隨矽氧化合物或是氟化合物濃度之增高而變大，原因是水性PU接著劑分子上的極性基的相互作用，而使得水性PU接著劑的黏度和分子的平均粒徑變大。實驗結果也指出，水性PU接著劑薄膜的拉應力(tensile strength)會隨氟化合物濃度之增高而變小，這是因為水性PU接著劑分子本身的作用力增強，結果導致水性PU接著劑薄膜的拉應力變小。在相同的實驗條件下，水性PU接著劑薄膜的伸長率(elongation)會分別隨矽氧化合物和氟化合物濃度之增高而變小，這是因為水性PU接著劑分子本身的作用力(intramolecular interaction)增大，使得分子形成緊縮形或微泡型的結構，因而造成水性PU接著劑薄膜的伸長率變小。水性PU接著劑薄膜的硬度，條件會分別隨著矽氧化合物和氟化合物濃度增高而變硬。這可能是因為分子排列較整齊之故。而水性PU樹脂薄膜的透濕度條件也會分別隨氟化合物和矽化合物濃度增高而變大，這是因為接枝在水性PU樹脂分子上的極性基增多之故。含矽化合物的PU接著劑薄膜的透濕度要比含氟化合物的PU接著劑薄膜的透濕度高，這是因為含矽化合物的極性基要比含氟化合物的極性基多之故。至於改變氟化合物之濃度而固定其他組成成分，所合成的水性PU接著劑薄膜的剝離強度條件會隨氟化合物之濃度增高而變大，這可能是因為水性PU接著劑分子主鏈上的極性基增多，而使得分子的架橋力增強之故。 The reaction of toluene diisocyanate with fluoro compound , silicon compound and other additives to form the conformation of water-based PU adhesive has been proven by IR spectra . In aqueous solution , the surface tension of water-based PU adhesive increased with increasing concentration of the fluoro compound . This is because the hydrophobics adsorbed at the surface of water became even more ordered. Experimental results showed that both viscosity and average particle size for water-based PU adhesive molecule in aqueous solution clearly increased with increasing concentration of silicon compound or fluoro compound , as a result of the intermolecular interaction of the hydrophobics linked to water-based PU adhesive molecules . Experimental results also indicated that the tensile strength of the film made by the water-based PU adhesive molecule decreased with increasing concentration of the fluoro compound . The strong intramolecular interaction of the water-based PU adhesive molecule itself resulted in decreasing the tensile strength of this film . Under the same experimental condition , the elongation of the film made by the water-based PU adhesive molecule apparently decreased with increasing concentration of the silicon compound and the fluoro compound , respectively . This maybe due to compact conformation or micelle structure formed , resulting from the strong intramolecular interaction . That the elongation of the film decreases . The hardness of the film made by the water-based PU adhesive molecule appeared to become harder as the concentration of the silicon compound and the fluoro compound , respectively . This is because the arrangement of the molecules becomes even more ordered . Apparently , the water-vapor permeability to the film made by the wayer-based PU adhesive molecule was seem to increase with increasing concentration of the fluoro compound and the silicon compound respectively , as a result of more hydrophilics attached to the backbone of the water-based PU molecule .However , the water-vapor permeability was better for the silicon-based PU adhesive ionomer than for the fluror-based PU adhesive ionomer . Since the silicon-based PU adhesive ionomer has more hydrophobic groups , therefore the water-vapor permeability of the film increases . It clearly indicated that the peel strength of the film made by the water-based PU adhesive molecule increased with increasing concentration of other ingredients . This may be due to increased crosslinking capability resulting from more hydrophilic groups linked to the backbone of the PU ionomer molecule .
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