紫外光可硬化型聚胺酯壓克力樹脂之研究

Studies on UV-curable Poly(urethane acrylate) Resin

曾士恭(Shr-Gung Tzeng)

指導教授 ： 謝國煌

國立臺灣大學/工學院/化學工程學研究所/碩士(2004年)

https://doi.org/10.6342/NTU.2004.02223

摘要

本研究以製備含不同分子量的聚氧丙烯二醇(PPG)為軟鏈節之紫外光可硬化聚胺酯壓克力樹脂，探討其紫外光硬化反應動力，並以不同紫外光照射曝光劑量及光起始劑濃度討論其反應動力參數，導出其反應動力方程式。另一方面，以三丙稀乙二醇雙丙烯酸酯(TPGDA)及丙烯酸(AA)不同的壓克力系單體作為紫外光可硬化胺酯-壓克力樹脂的反應稀釋單體，並進一步討論其PPG分子量及加入反應稀釋單體的變化對於紫外光曝光硬化後基本性質的影響。
研究中以FTIR光譜中甲基特殊吸收峰(CH3 bending~1375cm-1)為參考峰，追蹤丙烯酸酯基吸收峰(=C-H Out-of-plane bending,990cm-1)變化求出欲得之動力參數。結果顯示丙烯酸酯基濃度與硬化速率為一次反應級數關係，又反應速率與曝光光源劑量成二分之一次方關係，而與光起始劑濃度成(1-exp(-2.303ε[PI]d))0.5的比例關係。
紫外光硬化後塗膜的斷裂抗張強度及伸長率隨著AA的濃度增加而增加。紫外光硬化後塗膜的熱裂解溫度會隨AA的濃度增加而下降。而當AA的含量增加，紫外光硬化後塗膜的玻璃轉移溫度會往較高溫度移動，這說明了胺酯硬鏈節與AA的羧酸結構有相同的極性及氫鍵的結合。在接著測試中，結果顯示含AA濃度較高時PET上的塗膜有較佳的接著性。

關鍵字

反應動力方程式 ； 紫外光可硬化聚胺酯壓克力樹脂 ； 反應稀釋單體 ； 玻璃轉移溫度 ； 接著性 ； FTIR

並列摘要

UV curable polyurethane acrylate resins based on polyoxypropylene glycol(PPG) soft segment with different molecular weights were synthesized in this study. The kinetics of UV curing under different UV exposure doses, at various photoinitiator concentration was investigated and the kinetic equation was derived. In addition, UV curable urethane-acrylate resins were considered as reactive acrylate monomers as reactive diluents: Tripropylene Glycol Diacrylate(TPGDA) and Acrylic acid(AA). Further more, physical properties of this type of UV curable material, the effects on properties by varying the molecular weight of PPG and the effect of using various reactive diluents were discussed.
The internal reference peak of acrylate group（=C-H Out-of-plane bending,990cm-1） was methyl group （CH3 bending~1375cm-1）. The peak changes were tracked with FTIR. The results reveal that the kinetic rate equation for the concentration of acrylate group which UV exposure is first order, and for UV exposure dose is one-half order, and the UV exposure relationships is proportional to (1-exp(-2.303ε[PI]d))0.5.
The tensile strength and elongation at break of UV curable films increased with increase of AA concentration .The thermal decomposition temperature of UV curable films decreased with increase of AA concentration .The glass transition temperature(Tg) of UV curable films shifted to a higher temperature as the content of AA increased .This was interpreted in terms of possible compatibility of urethane hard segments and carboxylic acid group of AA due to their similar polarity and hydrogen bonding. In the adhesion test, it reveals that resin with increase of AA concentration show higher adhesion to the PET film.

並列關鍵字

kinetic e ； UV curable polyurethane acrylate resins

參考文獻

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