Université Côte d'Azur, Institut de Chimie de Nice, UMR CNRS 7272, 28 Avenue Valrose, 06108 Nice, Cedex 2, France.
SPECIFIC POLYMERS, 150 Avenue des Cocardières, Zac Via Domitia, 34160 Castries, France.
Biomacromolecules. 2020 Sep 14;21(9):3923-3935. doi: 10.1021/acs.biomac.0c01059. Epub 2020 Aug 27.
This work reports for the first time the copolymerization studies of 11 newly synthesized epoxidized vegetable oils (EVOs) that reacted with a disulfide-based aromatic dicarboxylic acid (DCA) to produce thermoset materials with recyclability properties. These new EVOs' reactivity and properties were compared with those of the two commercial references: epoxidized linseed oil (ELO) and epoxidized soybean oil (ESO). The structure-reactivity correlation is proposed by differential scanning calorimetry (DSC) analysis, corroborating the epoxy content of EVO monomers, the initiator effect, the copolymerization reaction enthalpy, and the temperature range. The thermomechanical properties of the obtained thermosets were evaluated and discussed in correlation with the structure and reactivity of monomers by dynamic mechanical analysis (DMA), tensile testing, and thermogravimetric analysis (TGA). It has been found that the higher the EVO functionality, the higher is the reactivity, cross-linking density, and final performances, with tan δ values ranging from 34 to 111 °C. This study investigates the chemical recycling and the solvent resistance of these vitrimer-like materials that have a high bio-based carbon content, from 58 to 79%, with potential application in coating or composite materials in the automotive sector.
这是首次报道了 11 种新合成的环氧化植物油（EVOs）与基于二硫键的芳香二酸（DCA）共聚的研究，以生产具有可回收性能的热固性材料。这些新 EVOs 的反应性和性能与两种商业参考物：环氧化亚麻籽油（ELO）和环氧化大豆油（ESO）进行了比较。通过差示扫描量热法（DSC）分析提出了结构-反应性关系，证实了 EVO 单体的环氧含量、引发剂效应、共聚反应焓和温度范围。通过动态力学分析（DMA）、拉伸测试和热重分析（TGA），对所得热固性塑料的热机械性能进行了评估和讨论，并与单体的结构和反应性相关联。研究发现，EVOs 的官能度越高，反应性、交联密度和最终性能越高，tan δ 值范围从 34°C 到 111°C。这项研究调查了这些类似 vitrimer 的材料的化学回收和耐溶剂性，这些材料具有高的生物基碳含量，从 58%到 79%，在汽车领域的涂料或复合材料中有潜在的应用。
