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題名 | 架橋硬化劑添加量對雙酚A型及液化木材為基質環氧樹脂硬化性及硬化樹脂性質之影響=Effects of the Dosage of Cross-Linking Hardener on the Curing Behavior and the Properties of Cured Bisphenol A-Type and Liquefied Wood-Based Epoxy Resins |
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作者 | 楊彝綱; 陳奕君; 李文昭; | 書刊名 | 中華林學季刊 |
卷期 | 49:1 2016.03[民105.03] |
頁次 | 頁33-47 |
分類號 | 467.4 |
關鍵詞 | 架橋硬化劑; 柳杉; 環氧樹脂; 液化木材; 熱性質; Cross-linking hardener; Cryptomeria japonica; Epoxy resins; Liquefied wood; Thermal properties; |
語文 | 中文(Chinese) |
中文摘要 | 本研究利用雙酚A(Bisphenol A)及酚/雙酚A液化柳杉(Liquefied Cryptomeria japonica; LW)分別與環氧氯丙烷(Epichlorohydrin)反應製備雙酚A型環氧樹脂(Bisphenol A-type epoxy resin;ER)及液化木材為基質環氧樹脂(Liquefied wood-based epoxy resin;LWER),並以三乙基四胺(Triethylenetetramine; TETA)為架橋硬化劑,設定胺當量與環氧當量比為0.8/1、0.9/1及1.0/1。以熱示差掃描卡量儀(Differential scanning calorimeter; DSC)採動態及等溫熱掃描模式分析不同架橋硬化劑添加量環氧樹脂之硬化行為,以傅利葉轉換紅外線光譜儀(Fourier transform infrared spectroscopy; FTIR)、溶出試驗、動態熱機械分析儀(Dynamic mechanical analyzer; DMA)、熱重分析儀(Thermogravimeter; TGA)探討不同條件硬化樹脂之性質。由試驗結果顯示,ER樹脂之分子量較小,粘度較低,硬化過程之放熱量較多,硬化樹脂之儲存模數較高,溶出試驗重量保留率較大,熱安定性較佳。架橋硬化劑添加量並未影響硬化樹脂之分子結構。ER樹脂隨架橋硬化劑添加量提高,硬化過程之放熱量較多,硬化樹脂之物理、動態機械及熱性質較佳。LWER樹脂則以架橋硬化劑當量比0.9/1者有較大之硬化反應放熱量,較佳之硬化樹脂性質。 |
英文摘要 | In this study, bisphenol A-type epoxy resin (ER) and liquefied wood-based epoxy resin (LWER) were prepared by reacting epichlorohydrin with bisphenol A and phenol/bisphenol A liquefied Cryptomeria japonica, respectively. Triethylenetetramine (TETA) was used as a cross-linking hardener with the equivalent ratio of amine to epoxy as 0.8/1, 0.9/1 and 1.0/1. The curing behavior of epoxy resins with different dosages of cross-linking hardener was detected by differential scanning calorimeter (DSC) with dynamic and isothermal heat scanning. The properties of cured resin were measured by Fourier transform infrared spectroscopy (FTIR), dissolving test, dynamic mechanical analysis (DMA) and thermogravimetry analysis (TGA). The results showed that ER resin had smaller molecular weight, lower viscosity and had more heat released during curing than that of LWER resin. In addition, the cured ER resins had higher storage modulus, larger weight retention after dissolving test and better heat stability. The chemical structure of cured resin was not influenced by the dosage of cross-linking hardener. For ER resin, increasing the dosage of cross-linking hardener caused a more heat released during curing and provided better physical, dynamic mechanical and thermal properties for cured resins. However, with the equivalent ratio of cross-linking hardener as 0.9/1 had more heat released and better properties for LWER resin. |
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