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Hardening process and properties of an epoxy resin with bio-based hardener derived from furfural

机译：糠醛衍生的生物基硬化剂对环氧树脂的硬化工艺及性能

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摘要

The development of bio-based plastics is an important research area because of its contribution to environmental preservation. Herein, we evaluated the properties of a bio-based epoxy resin synthesised using 2,2-bis(4-glycidyloxyphenyl) propane as the epoxy monomer and oxabicyclodicarboxylic anhydride (OBCA) as a bio-based hardener derived from furfural. The major hardening process of the resin at 130 degrees C, manifested in an exponential increase in the storage modulus, was complete within an hour, which was longer than that for a commercially available petroleum-based epoxy resin hardened using cis-cyclohexane dicarboxylic anhydride (CDCA). This indicated that OBCA was less reactive than CDCA, which has a similar structure. The bio-based epoxy resin showed excellent transparency in the visible light region and was thermally stable, with 5% weight loss at temperatures exceeding 270 degrees C. Glass transition temperatures were above 100 degrees C, and mechanical properties were moderately better than those of the commercially available epoxy resin. Moreover, the bio-based carbon content ranged from 21% to 53%, depending on the amount of OBCA added. Thus, the bio-based OBCA is a good hardener for a bio-based epoxy resin that can be used as a value-added material in industrial applications.
机译：由于其对环境保护的贡献，生物基塑料的开发是重要的研究领域。在本文中，我们评估了使用2,2-双（4-缩水甘油基氧基苯基）丙烷作为环氧单体和氧杂双环二羧酸酐（OBCA）作为衍生自糠醛的生物基硬化剂合成的生物基环氧树脂的性能。树脂在130摄氏度下的主要硬化过程表现为储能模量呈指数级增长，在一小时内完成，这比使用顺式环己烷二羧酸酐（ CDCA）。这表明OBCA的反应性低于CDCA，后者具有类似的结构。该生物基环氧树脂在可见光区域显示出极好的透明性，并且是热稳定的，在超过270摄氏度的温度下重量损失了5％。玻璃化转变温度高于100摄氏度，机械性能略好于市售环氧树脂。此外，取决于添加的OBCA量，生物基碳含量范围为21％至53％。因此，生物基OBCA是生物基环氧树脂的良好固化剂，可在工业应用中用作增值材料。

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