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    題名: MMA對水性PU/Acrylic混成樹脂物性影響之探討
    The effect of methyl methacrylate on the physical property of water soluble PU/Acrylic hybrid resin
    作者: 陳鵬升
    貢獻者: 應用化學研究所
    關鍵詞: 混成樹脂
    水性
    PU
    MMA
    Acrylic
    日期: 2006
    上傳時間: 2014-06-09 10:13:01 (UTC+8)
    摘要: 水性聚氨酯與甲基丙烯酸甲酯和甲基丙烯酸-2-羥基乙基酯及其它添加劑所合成的水性聚氨酯/壓克力混成樹脂；其分子結構已經由IR光譜證實。
    實驗結果顯示水性聚氨酯/壓克力混成樹脂溶液之平均粒徑大小和黏度會分別隨著甲基丙烯酸甲酯、甲基丙烯酸-2-羥基乙基酯和三-(2-羥乙基)異氰尿酸酯的濃度增高而變大，這是因為水性聚氨酯/壓克力混成樹脂分子間的作用力增強，使得分子的自由體積變大，結果導致水性聚氨酯/壓克力混成樹脂溶液之粒徑和黏度變大。
    水性聚氨酯/壓克力混成樹脂溶液的表面張力，會分別隨著甲基丙烯酸甲酯、甲基丙烯酸-2-羥基乙基酯和三-(2-羥乙基)異氰尿酸酯的濃度增高而變大，這是因為吸附在水溶液表面上的非極性基受溶夜內水性聚氨酯分子上極性基的作用而排列較整齊之故。
    水性聚氨酯/壓克力混成樹脂薄膜硬度會隨著甲基丙烯酸甲酯、甲基丙烯酸-2-羥基乙基酯和三-(2-羥乙基)異氰尿酸酯的濃度增高而到達到一個鉛筆H的硬度。水性聚氨酯/壓克力混成樹脂薄膜的光澤度亦會隨著甲基丙烯酸甲酯、甲基丙烯酸-2-羥基乙基酯和三-(2-羥乙基)異氰尿酸酯的濃度增高而逐漸變大，這可能是因為薄膜表面分子排列較整齊之故。
    水性聚氨酯/壓克力混成樹脂薄膜之拉應力和剛性、會分別隨著甲基丙烯酸甲酯、甲基丙烯酸-2-羥基乙基酯和三-(2-羥乙基)異氰尿酸酯濃度的增高而逐漸變大，這可能是因為混成樹脂分子與分子間的作用力增強，結果使得混成樹脂架橋能力變強之故。相反地，水性聚氨酯/壓克力混成樹脂薄膜之伸長率，卻會隨著分子與分子間的作用力增強而下降。
    水性聚氨酯/壓克力混成樹脂薄膜之吸水率，會分別會隨著甲基丙烯酸甲酯、甲基丙烯酸-2-羥基乙基酯和三-(2-羥乙基)異氰尿酸酯濃度的增高而稍微變大，這可能因為水性聚氨酯/壓克力混成樹脂薄膜表面上的極性基增多之故。
    水性聚氨酯/壓克力混成樹脂薄膜之耐磨性，會分別隨著甲基丙烯酸甲酯、甲基丙烯酸-2-羥基乙基酯和三-(2-羥乙基)異氰尿酸酯濃度增高而無明顯的磨耗，這可能因水性聚氨酯/壓克力混成樹脂薄膜分子與分子間的作用力增強，而使得薄膜的硬度增高之故。
    4,4-diphenylmethane diisocyanate reacted with dimethylol propionic acid and other additives in the presence of water to form the conformation of water-based PU/Acrylics hybrid resin has been proven by FT-IR spectra.
    The experimental results showed that, in aqueous solution, both average particle size and viscosity of water-based PU/Acrylics hybrid resin increased with increasing concentration of methyl methacrylate、2-hydroxyethyl methacrylate and tris(2-hydroxyethyl) isocyanurate, respectively. This is because increased free volume resulting from strong intermolecular interaction between water-based PU/Acrylics hybrid resin molecules themselves and between hybrid resin molecules and water molecules causes the average particle size and viscosity of water-based PU/Acrylics hybrid resin molecules to become large.
    In aqueous solution, the surface tension of water-based PU/Acrylics hybrid resin increased with increasing concentration of methyl methacrylate、2-hydroxyethyl methacrylate and tris(2-hydroxyethyl) isocyanurate, respectively. This may be due to the arrangement of the hydrophobics groups on the surface of the water becoming even more ordered.
    The hardness of the film made by the water-based PU/Acrylics hybrid resin was seen to reach one pencil’s 1H hardness as the concentrations of methyl methacrylate、2-hydroxyethyl methacrylate and tris(2-hydroxyethyl) isocyanurate, respectively, was further increased. However, the gloss of the film made by this hybrid resin increased with increasing concentration of methyl methacrylate、2-hydroxyethyl methacrylate and tris(2-hydroxyethyl) isocyanurate, respectively, as a result of the molecules one the surface of the film becoming even more ordered.
    Both the tensile strength and the modulus for the film made by the water-based PU/Acrylics hybrid resin increased with increasing concentration of methyl methacrylate、2-hydroxyethyl methacrylate and tris(2-hydroxyethyl)isocyanurate, respectively. This may be due to increased crosslinking capability resulting from strong intermolecular interaction between water-based PU/Acrylics hybrid resin molecules themselves and between hybrid resin molecules and water molecules. On the other hand, the elongation of this film appeared to decrease, as the concentration of methyl methacrylate、2-hydroxyethyl methacrylate and tris(2-hydroxyethyl)isocyanurate, respectively, increased.
    The water absorption of the film made by the water-based PU/Acrylics hybrid resin increased with increasing concentration of methyl methacrylate、2-hydroxyethyl methacrylate and tris(2-hydroxyethyl) isocyanurate, respectively, as a result of more hydrophibic groups linked to backbone of this hybrid resin molecule.
    The abrasion of the film made by the water-based PU/Acrylics hybrid resin not increased with increasing concentration of methyl methacrylate、2-hydroxyethyl methacrylate and tris(2-hydroxyethyl)isocyanurate, respectively, as a result of strong intermolecular interaction.
    顯示於類別:[化學系所] 博碩士論文

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