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題名 | 多元醇液化柳杉合成水性聚胺基甲酸酯樹脂之性質=Properties of Waterborne Polyurethane Resins Synthesized from Polyhydric Alcohol Liquefied Cryptomeria Japonica |
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作者 | 周珊沂; 李文昭; | 書刊名 | 林產工業 |
卷期 | 35:3 2016.09[民105.09] |
頁次 | 頁163-172 |
分類號 | 467.4 |
關鍵詞 | 柳杉; 液化木材; 樹脂薄膜; 熱性質; 水性聚胺基甲酸酯樹脂; Cryptomeria japonica; Liquefied wood; Resin films; Thermal properties; Waterborne polyurethane resin; |
語文 | 中文(Chinese) |
中文摘要 | 本研究以聚四甲基醚二醇(Polytetramethylene ether glycol;PTMG)及柳杉(Cryptomeria japonica)之多元醇液化木材(Liquefied wood;LW)混合物為多元醇原料,異佛爾酮二異氰酸酯(Isophorone diisocyanate)為異氰酸酯原料,二羥甲基丙酸(Dimethylolpropionic acid)為內部乳化劑,三乙胺(Trimethylamine)為中和劑,乙二胺(Ethylenediamine)為鏈延長劑製備水性聚胺基甲酸酯樹脂(Waterborne polyurethane resins;WPU),探討LW添加比 例對所合成水性PU樹脂性質之影響。由試驗結果得知,隨多元醇中LW比例增加,水性PU樹脂液之粘度及平均粒徑提高,而樹脂薄膜浸水試驗之重量保留則降低。在PTMG/LW之OH 基莫耳比4/6條件下所合成PU樹脂其薄膜有最高的耐溶劑重量保留、拉伸強度及模數。DSC分析顯示添加LW將增加PU樹脂內部無定形區域所占比例。DMA分析則顯示PU樹脂內部存在兩相結構,增加LW添加量可提高軟鏈段之剛性,但硬鏈段之剛性則降低。TGA分析顯示PU樹脂明顯熱裂解之重量損失主要發生在250~350℃,添加LW對此階段之熱抵抗性並無提升效果,但350℃以上則有較高之重量保留率。 |
英文摘要 | In this study, waterborne polyurethane resins were prepared by using the mixture of polytetramethylene ether glycol (PTMG) and polyhydric alcohol liquefied Cryptomeria japonica wood (LW) as the raw materials of polyol. In addition, Isophorone diisocyanate, dimethylolpropionic acid, trimethylamine, and ethylenediamine were used as the isocyanate, internal emulsifier, neutralizer, and chain extender, respectively. The effect of the added ratio of LW on the properties of waterborne PU resin was investigated. The results showed that the viscosity and average particle diameter of waterborne PU resins increased with increasing the proportion of LW in the polyol. However, the weight retention of resin films decreased after water immersing test. Among them, the film made from PU resin that was prepared by PTMG/LW mixture with the OH-group molar ratio of 4:6 had the highest solvent-resistant weight retention, tensile strength and modulus. The result of DSC analysis showed that the rate of amorphous region enhanced by adding LW. The result of DMA showed a two-phase structure existed inside the PU resin. Increasing the dosage of LW, the stiffness of soft segments enhanced, but it decreased for hard segments. The result of TGA indicated that the obvious weight loss due to thermal degradation occurred at 250-350℃. Adding LW was useless for improving the heat-resistance but had a higher weight retention at the temperature over 350℃. |
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