|
English
|
正體中文
|
简体中文
|
全文筆數/總筆數 : 46833/50693 (92%)
造訪人次 : 11854074
線上人數 : 641
|
|
|
資料載入中.....
|
請使用永久網址來引用或連結此文件:
https://irlib.pccu.edu.tw/handle/987654321/27464
|
題名: | 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 |
貢獻者: | 應用化學研究所 |
關鍵詞: | 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 |
上傳時間: | 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. |
顯示於類別: | [化學系所] 博碩士論文
|
在CCUR中所有的資料項目都受到原著作權保護.
|