差示扫描量热法
热固性聚合物
流变仪
聚合
高分子化学
材料科学
傅里叶变换红外光谱
亚麻籽油
活化能
聚合物
化学
化学工程
有机化学
复合材料
热力学
工程类
物理
作者
Mona Jamali Moghadam Siahkali,Nathanaël Guigo,Nicolas Sbirrazzuoli
出处
期刊:Macromolecules
[American Chemical Society]
日期:2023-01-03
卷期号:56 (2): 404-415
被引量:6
标识
DOI:10.1021/acs.macromol.2c02219
摘要
cis-Cyclobutane-1,2-dicarbocylic acid (CBDA-2) was synthesized and used as a biobased hardener to cross-link epoxidized linseed oil to produce a fully biobased thermoset. The polymerization mechanism was studied by means of real-time attenuated total reflection-Fourier transform infrared (ATR-FTIR), differential scanning calorimetry (DSC), stochastically modulated temperature DSC, and rheometry. The study highlights the importance of hydrogen bonding of CBDA-2 and catalytic effect of hydroxyl groups created during the reaction. Evolution of reactive functions with temperature and time, variation of activation energy, and pre-exponential factor was correlated to macroscopic changes, such as heat capacity variations and chemorheology. A macrokinetic model was proposed to describe the complete polymerization mechanism. It is shown that the obtained parameters accurately describe the polymerization using parameters with a real physical meaning.
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