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題名 | 添加液化柳杉對間苯二酚-甲醛樹脂反應性及膠合性能之影響=The Effect of the Liquefied Cryptomeria japonica Wood Addition on the Reactivity and Bonding Properties of Resorcinal-formaldehyde Resin |
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作者姓名(中文) | 張國峻; 張鎮; 陳彥君; 李文昭; | 書刊名 | 林產工業 |
卷期 | 36:3 2017.09[民106.09] |
頁次 | 頁159-170 |
分類號 | 467.4 |
關鍵詞 | 膠合強度; 柳杉; 混合樹脂; 反應性; 間苯二酚-甲醛樹脂; Bonding strength; Cryptomeria japonica; Mixed resin; Reactivity; Resorcinal-formaldehyde resin; |
語文 | 中文(Chinese) |
中文摘要 | 本研究將柳杉(Cryptomeria japonica)木材以酚及酚/間苯二酚混合液為溶劑進行液化處理分別得LW-1及LW-2兩種液化木材(Liquefied wood;LW),將間苯二酚與甲醛於酸性環境下合成間苯二酚-甲醛樹脂(Resorcinol-formaldehyde resin;RF),再將RF樹脂分別與LW-1及LW-2以不同重量比混合,探討RF/LW混合樹脂之反應性及膠合性能。由試驗結果得知,RF樹脂與LW之間不具備反應性,然添加聚甲醛架橋劑後,在RF/LW重量混合比5/5、4/6及3/7時,混合樹脂間則具備反應性,且隨LW混合比例增加,混合樹脂之反應性提高,膠化時間縮短。混合樹脂之膠化時間與其混合樹脂之pH値有關。硬化樹脂溶出試驗顯示,RF/LW混合樹脂中部分LW可參與RF樹脂高分子化反應。TGA分析顯示,隨LW混合比例提高,其硬化樹脂之熱抵抗性降低,其中混合LW-2者之熱抵抗性優於混合LW-1者。不同RF/LW混合樹脂之膠合性質比較,混合LW-1者之膠合強度大於混合LW-2者,在重量比3/7時其膠合強度仍可符合CNS 11031號標準中對結構用集成材第1類樹種之要求。 |
英文摘要 | In this study, two kinds of liquefied wood (LW), named LW-1 and LW-2, were obtained by liquefying wood of Cryptomeria japonica with phenol and the mixture of phenol/resorcinol as the solvent. Resorcinol-formaldehyde resin (RF) was synthesized by reacting resorcinol with formaldehyde under acidic condition. Then, the RF resin was mixed with LW-1 and LW-2, respectively, with different weight ratios. The reactivity and bonding properties of RF/LW mixed resins were investigated. The result shows that there is no reactivity between the RF resin and the LW. However, the mixture of RF/LW with the weight ratio of 5/5, 4/6 and 3/7 possessed the reactivity when paraformaldehyde was added as a cross-linking agent. Furthermore, their reactivity increased and gelation time shortened with the proportion of LW increased. The gelation time of the mixed resin is related to the pH of the mixed resin. The result of dissolving test shows that part of the LW in the RF/LW mixed resin can participate in the polymerization of RF resin. TGA analysis shows that the thermal resistance of cured resin decreased with the proportion of LW increased. Wherein mixed with LW-2 has the thermal resistance better than that mixed with LW-1. Comparison of the bonding properties of different RF/LW mixed resins, mixed with LW-1 has bonding strength higher than that of LW-2. The bonding strength of the mixed resin which has the weight ratio of 3/7 can still meet the requirement of CNS 11031 standard for structural laminated wood with the first type tree species. |
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