Abstract To increase the usage value of canola meal (CM), a by-product of canola oil extraction, poly (styrene- co -maleic anhydride-co-glycidyl methacrylate) (PSMG) was prepared and used as a novel chain extender to modify CM. FTIR tests showed that cross-linking took place in the CM matrix and PSMG was covalent bonded with canola proteins; furthermore, the surface of fibers present in the CM composite was covered by proteins, attributed to the reactivity of anhydride groups on PSMG. The modified CM composites showed more apparent amorphous characteristic with the addition of PSMG, according to DSC results. DMA results suggested that cross-linked proteins could be further coupled by glycerol reacting with the anhydride groups remaining in the cross-linked proteins, and thus the storage moduli and the glass transition temperature ( T g ) of the modified CM composites increased with the addition of more PSMG. The reactions of proteins with proteins, proteins with fibers, and proteins with glycerol were further confirmed by TGA. SEM images showed that the CM matrix became much denser and the interfacial adhesion between fibers and the CM matrix was increased by the chemical modification, which also contributed to an increase in the tensile strength of the modified CM composites.

中文翻译：

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新型聚合物扩链剂增强双低菜粕复合材料的反应挤出制备及表征

摘要 为了提高双低油菜籽油提取副产品双低油菜粕 (CM) 的使用价值，制备了聚（苯乙烯-共-马来酸酐-共-甲基丙烯酸缩水甘油酯）（PSMG），并将其用作新型扩链剂进行改性。厘米。FTIR 测试表明，CM 基质中发生了交联，PSMG 与双低油菜籽蛋白共价键合；此外，由于 PSMG 上酸酐基团的反应性，CM 复合材料中存在的纤维表面被蛋白质覆盖。根据 DSC 结果，改性 CM 复合材料在添加 PSMG 后表现出更明显的无定形特征。DMA 结果表明交联蛋白可以通过甘油与交联蛋白中残留的酸酐基团反应进一步偶联，因此，随着PSMG的加入，改性CM复合材料的储能模量和玻璃化转变温度（Tg）增加。TGA进一步证实了蛋白质与蛋白质、蛋白质与纤维以及蛋白质与甘油的反应。SEM 图像表明，CM 基体变得更加致密，纤维与 CM 基体之间的界面粘附力通过化学改性增加，这也有助于提高改性 CM 复合材料的拉伸强度。