腰果酸环氧树脂的合成及其固化反应特性研究

doi:10.3969/j.issn.0253-2417.2020.04.006

Abstract

Abstract:

The anacardic acid based epoxy resin type-Ⅰ(EACA-Ⅰ) was synthesized by the reaction of anacardic acid(ACA) obtained from cashew nut shell liquid(CNSL) and epichlorohydrin. Then, the side chain oxidation of EACA-Ⅰ was carried out to form the anacardic acid based epoxy resin type-Ⅱ(EACA-Ⅱ). The chemical structure of the epoxy resins was characterized by HPLC, FT-IR and NMR. The epoxy values of EACA-Ⅰ and EACA-Ⅱ were 3.7 mmol/g and 6.0 mmol/g, and the viscosities at 25 ℃ were 80 and 300 mPa·s, respectively. The characterization of curing reaction and heat resistance of the cured products obtained from the reaction of epoxy resins with tetrahydromethyl-1, 3-isobenzofurandione(MeHHPA) and isophorondiamine(IPDA) were investigated by DSC and TGA, respectively. The results showed that the heat release of the curing process of the anacardic acid based epoxy resins with MeHHPA was moderate. However, the heat release of the curing process of anacardic acid based epoxy resin with IPDA was intense; the cured products obtained from the reaction of the anacardic acid based epoxy resins with MeHHPA showed good thermal stability with the initial temperature of degradation more than 371.6 ℃ and the peak temperature of weight loss at 417.5 ℃.

Key words: cashew nut shell liquid, anacardic acid, cardanol, epoxy resin

CLC Number:

TQ35

Jian CHEN,Guomin WU,Shuping HUO,Zhenwu KONG. Synthesis and Characterization of Curing Reaction of Epoxy Resin Obtained from Anacardic Acids[J]. Chemistry and Industry of Forest Products, 2020, 40(4): 41-46.

Figures/Tables 8

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References 15

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样品 sample	峰编号 No.	化合物 chemical compound	保留时间/min retention time	GC含量/% content
腰果壳液 cashew nut shell liquid(CNSL)	1	C₂₁H₃₀O₂	6.298	7.6247
	2	C₂₁H₃₂O₂	8.573	2.8571
	3	C₂₁H₃₄O₂	12.911	1.1335
	4	C₂₂H₃₀O₃	13.489	34.0618
	5	C₂₁H₃₀O	14.279	0.9642
	6	C₂₂H₃₂O₃	19.314	14.6285
	7	C₂₁H₃₂O	20.964	1.4235
	8	C₂₂H₃₄O₃	29.798	32.0729
	9	C₂₁H₃₄O	32.987	1.4220
	10	C₂₂H₃₆O₃	54.014	2.3091
	11	C₂₁H₃₆O	57.705	0.6687
腰果酸 anacardic acid(ACA)	4	C₂₂H₃₀O₃	13.45	38.9191
	6	C₂₂H₃₂O₃	19.28	16.4424
	8	C₂₂H₃₄O₃	29.76	36.7350
	10	C₂₂H₃₆O₃	53.99	2.6649

固化体系 curing systems	热焓/(J·g^-1) heat content	DSC峰温/℃ peak temperature	降解温度/℃ decomposition temperature	TG峰温/℃ peak temperature	800 ℃残炭率/% residue at 800 ℃
EACA-Ⅰ/MeHHPA	72.9	173.6	387.9	419.1	1.89
EACA-Ⅱ/MeHHPA	87.2	173.9	371.6	417.5	4.30
EACA-Ⅰ/IPDA	124.8	116.7	298.6	331.9	2.80
EACA-Ⅱ/IPDA	249.9	112.6	290.1	325.9	6.38

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Synthesis and Characterization of Curing Reaction of Epoxy Resin Obtained from Anacardic Acids

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