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首页> 外文期刊>Journal of Applied Polymer Science >High performance bio-based thermosetting resins composed of tung oil and bismaleimide
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High performance bio-based thermosetting resins composed of tung oil and bismaleimide

机译：由桐油和双马来酰亚胺组成的高性能生物基热固性树脂

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摘要

The reaction of tung oil (TO) and 1,1′-(methylenedi-4,1-phenylene) bismaleimide (BMI) in 1,3-dimethyl-2-imidazolidinone (DMI) at 150°C for 4 h and subsequent precipitation gave TO/BMI prepolymer, which was cured at 200°C for 2 h gave crosslinked TO/BMI product with C=C ratio from 1/1 to 1/4. The FE-SEM analysis revealed that all the cured products are homogeneous and no phase separation was observed. The glass transition temperature and 5% weight loss temperature of the cured TO/BMI increased with increasing BMI content. The maximal tensile strength (38.1 MPa) and modulus (2.6 GPa) were obtained for the cured products with the C=C ratios of 1/2 and 1/3, respectively. To evaluate the reaction of TO and BMI, the model reaction products of TO and N-phenylmaleimide (PMI) in DMI were analyzed by ~1H-NMR spectroscopy. The NMR data of the reaction products of TO/PMI with the C=C ratio 2/1, 1/1, 1/2, 1/3, and 1/4 at 150°C for 24 h revealed that Diels-Alder reaction preferentially occurred at 2/1, and that ene reaction and other reactions such as radical homo and copolymerization gradually increased with decreasing C=C ratio of TO/PMI.
机译：桐油（TO）与1,1'-（亚甲基二-4,1-亚苯基）双马来酰亚胺（BMI）在1,3-二甲基-2-咪唑啉酮（DMI）中的反应在150°C下反应4小时并随后沉淀得到TO / BMI预聚物，将其在200℃下固化2小时，得到C / C比为1/1至1/4的交联TO / BMI产物。 FE-SEM分析表明，所有固化产物都是均匀的，没有观察到相分离。固化的TO / BMI的玻璃化转变温度和5％失重温度随BMI含量的增加而增加。对于C ＝ C比分别为1/2和1/3的固化产物，获得了最大拉伸强度（38.1 MPa）和模量（2.6 GPa）。为了评估TO和BMI的反应，通过〜1 H-NMR光谱分析了DMI中TO和N-苯基马来酰亚胺（PMI）的模型反应产物。 C / C比为2 / 1、1 / 1、1 / 2、1 / 3和1/4的TO / PMI反应产物在150°C下进行24小时的NMR数据表明，Diels-Alder反应优先发生在2/1处，随着TO / PMI的C = C比的降低，烯键反应和其他反应（如自由基均聚物和共聚反应）逐渐增加。

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