摘要
对淀粉进行增韧改性,研究共混改性后力学性能的变化。制备不同含量的淀粉/聚乳酸共混材料,通过双螺杆挤出机进行挤出、造粒,通过注塑机注塑成样条,测试其力学性能,检测拉伸强度、断裂伸长率。结果表明,偶联剂最佳添加量为0.8%,纳米二氧化硅最佳添加量为1.5%。在淀粉/聚乳酸共混体系中,随着聚乳酸含量的增加,材料的拉伸强度先降低后升高,聚乳酸的最佳添加量为20%。改性后的淀粉材料力学性能优于改性前,断裂伸长率明显提高。
The experiment is mainly to toughen and modify starch and to explore the change of mechanical properties of starch after that.The researchers prepare different content of starch/polylactic acid blend material,through the twin screw extruder extrusion and granulation,by injection molding machine injection into spline,and test its mechanical properties,the tensile strength,and elongation at break.The results show that the coupling agent content is 0.8%,and the best nano silicon dioxide optimum adding amount is 1.5%.In starch/polylactic acid blend system,with the increase of polylactic acid content,the tensile strength of the material increases after first decreases,and the best addition amount of poly(lactic acid)(PLA)is 20%.The modified starch material’s mechanics performance is better than that of before modification,andelongation at break increased significantly.
作者
豆鹏飞
DOU Pengfei(Changqing oil field co.,Ltd.,Yulin,Shaanxi 718100,China)
出处
《中州大学学报》
2019年第6期116-119,共4页
Journal of Zhongzhou University
关键词
力学性能
淀粉改性
添加量
mechanical properties
starch modification
add the amount
