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首页> 外文期刊>Journal of Applied Polymer Science >Synthesis of epoxy resins from alcohol-liquefied wood and the mechanical properties of the cured resins
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Synthesis of epoxy resins from alcohol-liquefied wood and the mechanical properties of the cured resins

机译：由醇液化木材合成环氧树脂及其固化物的机械性能

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摘要

New wood-based epoxy resins were synthesized from alcohol-liquefied wood. Wood was first liquefied by the reaction with polyethylene glycol and glycerin. The alcohol-liquefied wood with plenty of hydroxyl groups were precursors for synthesizing the wood-based epoxy resins. Namely, the alcoholic OH groups of the liquefied wood reacted with epichlorohydrin under alkali condition with a phase transfer catalyst, so that the epoxy groups were put in the liquefied wood. The wood-based epoxy resins and the alcohol-based epoxy resins as reference materials were cured with polyamide amine. The glass transition temperature (Tg), the tensile strength, and the modulus of elasticity of the wood-based epoxy resin were higher than those of the alcohol-based epoxy resin. Also, the shear adhesive strength of the wood-based epoxy resin to steel plates was higher than those of the alcohol-based epoxy resins, which was equivalent to the level of petroleum-based bisphenol-A type epoxy resins. The higher Tg of the wood-based epoxy resin than that of the alcohol-based epoxy resin is one of the evidences that the wood-derived molecules were chemically incorporated into the network structures.
机译：从酒精液化的木材合成了新型的木基环氧树脂。首先通过与聚乙二醇和甘油的反应将木材液化。具有大量羟基的醇液化木材是合成木基环氧树脂的前体。即，液化木材的醇性OH基在碱性条件下与表氯醇在相转移催化剂下反应，从而将环氧基放入液化木材中。用聚酰胺胺固化作为参考材料的木基环氧树脂和醇基环氧树脂。木质基环氧树脂的玻璃化转变温度（Tg），拉伸强度和弹性模量高于醇基环氧树脂的玻璃化转变温度（Tg），拉伸强度和弹性模量。而且，木材基环氧树脂对钢板的剪切粘合强度高于醇基环氧树脂的剪切粘合强度，这相当于石油基双酚A型环氧树脂的水平。木质基环氧树脂的Tg比醇基环氧树脂的Tg高，这是木材衍生的分子化学结合到网络结构中的证据之一。

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