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題名 | 酚液化孟宗竹材製備Novolak型酚樹脂及其在成型物製作之應用=Preparation of Novolak Type PF Resins from Liquefied Moso Bamboo (Phyllostachys Pubesens) and Utilization in the Manufacturing of Moldings |
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作 者 | 李文昭; 陳奕君; 劉正字; | 書刊名 | 林業研究季刊 |
卷期 | 29:3 2007.09[民96.09] |
頁次 | 頁75-84 |
分類號 | 436.5 |
關鍵詞 | 液化竹材; 成型物; 孟宗竹; Novolak型酚樹脂; Liquefied bamboo; Moldings; Moso bamboo; Novolak type PF resin; |
語文 | 中文(Chinese) |
中文摘要 | 本研究以酚為溶劑,硫酸及鹽酸為催化劑對孟宗竹進行液化處理,探討酚液化竹材應用於Novolak型酚樹脂製備之合成條件,並進一步將所得合成樹脂應用於成型材製造。由試驗結果得知,酚液化竹材與甲醛反應性高,以一般Novolak型酚樹脂之合成法易於反應過程發生膠化現象而不適用,採用間苯二酚甲醛樹脂之合成法則可有效降低其反應性,並獲得液體態合成樹脂。於液態Novolak型酚樹脂中添加四氮六甲基圜,竹粉及硬脂酸鋅所得之成型材原料以DSC分析顯示其具備熱硬化性,熱壓所得成型物經丙酮溶出試驗示具有高的膠化度,然侵水時之吸水率較一般Novolak型酚樹脂為原料所製造者為高,基成型物之吸水率與樹脂合成條件及熱壓溫度並無明顯關係,然其中以硫酸為催化劑之液化竹材在甲醛與酚之莫耳比為0.8/1.0所合成之R-S2樹脂為原料,並以溫度180℃熱壓成型者吸水率最低。 |
英文摘要 | In this study, moso bamboo (phyllostachys pubesens) was liquefied in phenol with the □S□ and HCl as catalyst. The appropriate synthesis conditions of novolak type PF resins prepared from the liquefied bamboo was investigated. The results showed that the synthesis method used for traditional novolak PF resins would be not suitable. The reactivity of liquefied bamboo was too high and the reactant would cure at the period of synthesis process. But using the method as resorcinol formaldehyde (RF) resin prepared, the reactivity could be deceased effectively and the liquid state resins obtained. DSC thermal analysis shown the liquid novolak resins mixed with hexamine, bamboo powder, and zinc stearate had the capability of thermosetting. The acetone solubility test shown the moldings made from these nvolak resins had the high degree of gel. But the water absorption rate after soaked in water was higher than of normal novolak PF resins. There was no significant relationship between the water absorption and hot-pressing temperature. But the moldings using R-S2 that prepared from the liquefied bamboo with □S□ as a catalyst and had the molar ration of formaldehyde with phenol as 0.8/1.0, as the raw material and hot-pressed with the temperature of 180℃ had the lowest water absorption. |
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