不同壓克力之種類與濃度對水性PU/壓克力混成樹脂之合成及其物性影響之情形

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题名:	不同壓克力之種類與濃度對水性PU/壓克力混成樹脂之合成及其物性影響之情形 The effect of the type and the concentration for various acrylics on the synthesis of water-soluble Polyurethane/Acrylics hybrid resins and their physical property
作者:	劉羽容
贡献者:	應用化學研究所
关键词:	水性PU/壓克力混成樹脂壓克力水性PU樹脂 water-soluble Polyurethane/Acrylics hybrid resins Acrylics water-soluble Polyurethane
日期:	2006
上传时间:	2014-06-13 10:41:35 (UTC+8)
摘要:	H12MDI與聚酯，dimethylol propionic acid，methyl methacry- late和其他添加劑在90-95℃下反應所合成的水性PU／Acrylics混成樹脂之分子結構，已經IR光譜證實。實驗結果發現水性PU／Acryl- ics混成樹脂溶液之表面張力似乎會分別隨3-(trimethoxysilyl)- propyl methacrylate，methyl methacrylate和2-hydroxyethyl methacrylate 濃度增高而變大，原因可能是因為水溶液表面上的非極性基排列較整齊之故。在水溶液中水性PU／Acrylics混成樹脂分子之平均粒徑似乎會分別3-(trimethoxysilyl)propyl methacry- late， methyl methacrylate和2-hydroxyethyl methacrylate之濃度增高而變大，這是因為水性PU／Acrylics混成樹脂之分子之自由體積變大之故。至於水性PU／Acrylics混成樹脂分子之平均粒徑要比水性PU樹脂分子之平均粒徑大，原因是因為水性PU樹脂與壓克力樹脂混成形成較大的樹脂分子，結果造成樹脂分子的平均粒徑變大。利用光學顯微鏡探討水性PU／Acrylics混成樹脂分子在水溶液中樹脂分子的表面結構，測試結果發現水性PU／Acrylics混成樹脂分子的平均粒徑比水性PU樹脂分子的平均粒徑大，這是因為水性PU樹脂與壓克力樹脂混成形成較大的混成樹脂分子之故。水性PU／Acrylics混成樹脂薄膜之光澤度似乎不會隨3-(trimethoxysilyl)propyl methacrylate，或是methyl methacry- late或是2-hydroxyethyl methacrylate濃度之增高而有所變化。實驗結果也顯示水性PU／Acrylics混成樹脂薄膜之拉應力會分別隨3-(trimethoxysilyl)propyl methacrylate和2-hydroxyethyl methacrylate之濃度增高而變大，卻會隨methyl methacrylate之濃度增高而變小。相反的，水性PU／Acrylics混成樹脂薄膜之伸長率似乎會隨3-(trimethoxysilyl)propyl methacrylate和2-hydro- xyethyl methacrylate濃度之增高而變小，卻會隨methyl methacry- late濃度之增高而變大。進一步探討水性PU／Acrylics混成樹脂薄膜之硬度，結果發現薄膜之硬度會隨2-hydroxyethyl methacrylate濃度增高而變大，卻會隨3-(trimethoxysilyl)propyl methacrylate和methyl methacrylate濃度之增高而變小。 The reaction of H12MDI with dimethylol propionic acid, methyl methacrylate and other additives, at around 95 ℃,to form the conformation of water-based PU/Acrylics hybrid resin has been proven by IR spectra. In aqueous solution, the surface tension for water-based PU/Acrylics hybrid resin appeared to increase with increasing concentration of 3-(trimethoxysilyl)propyl methacrylate, methyl methacrylate and 2-hydroxyethyl meth- acrylate, respectively. This is because the hydrophobics adsorbed at the surface of the water becomes even more ordered. For water-based PU/Acrylics hybrid resin system, the average particle size of this hybrid resin was seem to increase with increasing concentration of 3-(trimethoxysilyl)propyl meth- acrylate, methyl methacrylate and 2-hydroxyethyl methacry- late respectively, as a result of increased free volume of water-based PU/Acrylics hybrid resin molecule. The average particle size was seem to be greater for water-based PU/Acrylics hybrid resin molecule than for water-based PU resin molecule. This is because the average molecule weight of water-based PU/Acrylics hybrid resin molecule formed is larger. To study the surface structure for both water-based PU/Acrylics hybrid resin and water-based PU resin in aqreous solution, by using Optical Microscope apparatus, it ethibited the average particle size to be larger for water-based PU resin molecule. The reason is the same as described previously. The gloss of the film made by the water-based PU/Acrylics hybrid resin appeared not to increase with increasing concentration of 3-(trimethoxysilyl)propyl methacrylate or methyl methacry- late or 2-hydroxyethyl methacrylate. Experimental results showed that the tensile strength for the film made by the water-based PU/Acrylics hybrid resin appeared to increase with increasing concentration of 3-(trimethoxysilyl)propyl meth- acrylate and 2-hydroxyethyl methacrylate respectively, but, it was seen to decrease with increasing concentration of methyl methacrylate. However, on the other hand, the elongation of the film made by the water-based PU/Acrylics hybrid resin decreased with increasing concentration of 3-(trimethoxysilyl)propyl methacrylate and 2-hydroxyethyl methacrylate respectively, but increased with increasing concentration of methyl methacrylate. In order to further study the hardness of the film made by the water-based PU/Acrylics hybrid resin, it indicated that the hardness of the film appeared to increase with increasing concentration of 2-hydroxyethyl methacrylate but decreased with increasing concentration of 3-(trimethoxysilyl) propyl methacrylate and methyl methacrylate respectively.
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