生物基苯烷胺与低分子量胺固化环氧树脂的DSC研究

IF 0.5 4区化学 Q4 CHEMISTRY, MULTIDISCIPLINARY

Chemija Pub Date : 2022-05-04 DOI:10.6001/chemija.v33i2.4709

J. Jonikaitė-Švėgždienė, Liepa Pastarnokienė, Virginija Juknevičiūtė, R. Makuška

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引用次数: 4

摘要

在本研究中，通过差示扫描量热法（DSC）和流变学测量研究了低分子量胺EDA、TETA和Jeffamine D-230以及生物基苯烷胺Cardolite®NX-6019、Cardolite™Lite-2002和Cardolite？GX-6004对BPA基环氧树脂Araldite®GY-2600和Araldite™GY-240的固化。DSC提供了关于整个反应动力学（固化反应焓ΔHR；固化度α；固化反应速率dα/dt）和固化产物的玻璃化转变温度（Tg）的定量信息。结果表明，苯烷胺对环氧树脂的DSC固化在较低的温度下开始，与低分子量胺固化剂相比，固化速率略低。酚烷胺的固化焓较低，尤其是在粘度较大的环氧树脂GY-2600的情况下。固化的环氧树脂的Tg在50至98°C之间变化，当用腰果醇基酚烷胺固化时，Tg略低。结果表明，生物基苯烷胺对环氧树脂的固化在类似的温度区间内进行，就像使用低分子量胺作为固化剂一样，但放热效应较小，这可能是一个优势。

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Curing of epoxy resins by bio-based phenalkamines vs low-molecular-weight amines: study by DSC

In this study, curing of BPA-based epoxy resins Araldite®GY-2600 and Araldite®GY-240 by low-molecular-weight amines EDA, TETA and Jeffamine D-230, and bio-based phenalkamines Cardolite®NX-6019, Cardolite®Lite-2002 and Cardolite®GX-6004 was studied by differential scanning calorimetry (DSC) and rheology measurements. DSC provided quantitative information on the overall reaction kinetics (the enthalpy of curing reaction, ΔHR; cure degree, α; curing reaction rate, dα/dt) and the glass transition temperature (Tg) of the cured product. It was demonstrated that the DSC curing of epoxy resins by phenalkamines started at lower temperature, and the curing rates were slightly lower compared to those cured by low-molecular-weight amine hardeners. The enthalpy of the curing by phenalkamines was lower, especially in the case of more viscous epoxy resin GY-2600. Tg of the cured epoxy resins varied from 50 to 98°C and was slightly lower when cured with cardanol-based phenalkamines. The results demonstrate that curing of epoxy resins by bio-based phenalkamines proceeds in a similar temperature interval like using low-molecular-weight amines as hardeners but with less exothermic effect, which could be an advantage.

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来源期刊

Chemija 化学-化学综合

CiteScore

1.30

自引率

16.70%

发文量

审稿时长

>12 weeks

期刊介绍： Chemija publishes original research articles and reviews from all branches of modern chemistry, including physical, inorganic, analytical, organic, polymer chemistry, electrochemistry, and multidisciplinary approaches.