Synthesis of rosin-based flexible anhydride-type curing agents and properties of the cured epoxy
Synthesis of rosin-based flexible anhydride-type curing agents and properties of the cured epoxy
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DOI：
10.1002/pi.2680
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发表时间：
2009-12-01
影响因子：
3.2
通讯作者：
Xian, Ming
中科院分区：
文献类型：
--
作者：
Wang, Honghua;Liu, Xiaoqing;Xian, Ming
背景：虽然松香酸衍生物近年来在聚合物合成中受到关注，但据我们所知，它们很少被用作环氧固化剂。本研究的目的是合成松香型柔性酸酐固化剂，并证明通过选择具有适当分子刚性/柔韧性的松香型酸酐固化剂，可以控制固化的环氧树脂的柔韧性。结果：合成了马来酸丁酯封端的低相对分子质量聚己内酯(PCLS)，并研究了其作为环氧树脂酸酐固化剂的作用。产物的化学结构经核磁共振氢谱和傅里叶变换红外光谱确证。研究了固化后的环氧树脂的力学性能和热性能。结果表明，环氧酸酐当量比和PCL二元醇的相对分子质量均对固化树脂的性能有重要影响。结论：松香型端酸酐聚酯可作为生物基环氧树脂固化剂。通过改变聚酯链段的分子长度和环氧树脂与固化剂的比例，可以获得固化的环氧树脂的广泛的力学和热性能。(C)2009年化学工业学会
BACKGROUND: Although rosin acid derivatives have received attention in polymer synthesis in recent years, to the best of our knowledge, they have rarely been employed as epoxy curing agents. The objective of the study reported here was to synthesize rosin-based flexible anhydride-type curing agents and demonstrate that the flexibility of a cured epoxy resin can be manipulated by selection of rosin-based anhydride-type curing agents with appropriate molecular rigidity/flexibility.RESULTS: Maleopimarate-terminated low molecular weight polycaprolactones (PCLs) were synthesized and studied as anhydride-type curing agents for epoxy curing. The chemical structures of the products were confirmed using H-1 NMR spectroscopy and Fourier transform infrared spectroscopy. Mechanical and thermal properties of the cured epoxy resins were studied. The results indicate that both the epoxy/anhydride equivalent ratio and the molecular weight of PCL diol play important roles in the properties of cured resins.CONCLUSION: Rosin-based anhydride-terminated polyesters could be used as bio-based epoxy curing agents. A broad spectrum of mechanical and thermal properties of the cured epoxy resins can be obtained by varying the molecular length of the polyester segment and the epoxy/curing agent ratio. (C) 2009 Society of Chemical Industry