Actetyl high amylose soybean protein were molded with acetyl high amylose starch and soybean protein as raw material. The mechanical properties, water resistance, thermal stability and processing characteristics of the mixed materials were studied and tested. The results showed that the addition of acetyl high amylose increased, the tensile strength, breaking elongation and fracture energy mixed plastics at low concentration. While, the water absorption rate of 2h and 24 h decreased, the R value increased, which increased the strength, flexibility, toughness and water resistance of the plastic. Moreover, only one loss peak existed and in the acetyl high amylose/soybean protein plastic, and its Tg1 was lower than SP0, indicating that the compatibility between acetyl high amylose and soy protein was good. And the mixture could significantly improve the mixing system storage modulus. When the acetyl high amylose and soy protein mixed, improved the thermal stability and processing characteristics of plastic.%以乙酰基高直链淀粉和大豆蛋白为原料,经模压成型制成乙酰基高直链淀粉/大豆蛋白塑料,对该混合材料的力学性能、抗水性、热稳定性、加工特性进行研究测试.结果表明:添加乙酰基高直链淀粉,在较低浓度时,混合塑料的拉伸强度、断裂伸长率和断裂能均显著提高;而2、24 h吸水率下降,R值增加,提高其强度、柔顺性、韧性和抗水性;乙酰基高直链淀粉/大豆蛋白塑料中仅存在一个损耗峰,且其Tg1低于SP0,表明乙酰基高直链淀粉与大豆蛋白之间相容性良好;且二者混合能显著提高混合体系的储能模量;当乙酰基高直链淀粉与大豆蛋白混合时,改善了塑料的热稳定性和加工性.
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