摘要: 本文主要为高性能聚氨酯复合材料的改性研究,在总结前期实验数据的基础上,选取断裂伸长率89%的配方作为基体,继而添加KH-560改性的无碱短切玻纤制备聚氨酯复合材料,通过对其力学性能、热变形温度和断面进行表征得:当短切玻纤载入量小于9%时,聚氨酯复合材料的拉伸强度随载入量的增加而增大,断裂伸长率呈相反趋势,而对冲击强度改性效果不明显;热变形温度也因短切玻纤的载入而显著提高,且与载入量成正比,在玻纤载入量为9%时达到最优的改性效果,其中以长径比为45的短切玻纤最好,其增幅可高达22.24%;SEM图表明长径比为45的短切玻纤分散性最好,增强效果最佳。24012
毕业论文关键词: 聚氨酯;无碱短切玻纤;复合材料;热变形温度
Research of a High-Performance Polyurethane Composite
Abstract: This article is mainly for a modification of high performance polyurethane composite material. On the basis of summarizing previous experimental data, choosing a elongation at break 89% formula as substrate, then add the chopped E-glass fiber which modified with KH-560 to prepare the polyurethane composite. we gain some information by means of a series of performance examination,including mechanical properties test, heat deflection temperature and SEM test. The testing results indicated that tensile strength increased with the adding of glass fiber when it under 9%, the elongation at break presented the opposite tendency, but an unconspicuous reinforcing effect on the impact strength; a remarkable increase of heat deflection temperature result of the loading of glass fiber, which was proportional, and obtained an optimal modification effect when the chopped E-glass fiber loading of 9%, the best of them was the fiber with 45 aspect ratio, it’s amplification reached up to 22.24%;the SEM micrographs clearly reveal that the chopped E-glass fiber with 45 aspect ratio attained the greatest dispersity and enhancement.
Keywords: Polyurethane;Chopped E-glass Fiber;Composite material; Heat Deflection Temperature
目 录
1 绪论 1
1.1 聚氨酯复合材料的概述 1
1.1.1 聚氨酯复合材料的发展历史 1
1.1.2 聚氨酯复合材料的原理及反应机理 2
1.1.3 聚氨酯复合材料的制备 4
1.2 聚氨酯复合材料的特点及性能 5
1.2.1 聚氨酯复合材料的特点 5
1.2.2 聚氨酯复合材料的性能 5
1.2.3 其他性能 5
1.3 聚氨酯复合材料的应用领域 5
1.4 聚氨酯复合材料的研究进展 7
1.5 课题研究的目的和意义 8
1.5.1 研究目的 8
1.5.2 研究意义 8
1.6 课题研究内容 9
2 实验部分 10
2.1 实验用主要原料 10
2.2 实验用仪器设备 10
2.3 实验过程 11
2.3.1 聚氨酯复合材料基体配方的确定 11
2.3.2 聚氨酯复合材料中A组份的制备 12
2.3.3 聚氨酯复合材料的制备 12
2.4 聚氨酯复合材料的性能表征 12
2.4.1 拉伸性能测定 12
2.4.2 抗冲击性能测定 12
2.4.3 耐高温性能测定 13
2.4.4 断面形貌表征 13
3 实验结果与讨论 14
3.1 不同纤文含量对聚氨酯复合材料拉伸性能的影响 14
3.2 不同纤文含量对聚氨酯复合材料抗冲击性能的影响 15
3.3 不同纤文含量对聚氨酯复合材料耐高温性能的影响 16 高性能聚氨酯复合材料的研究:http://www.751com.cn/cailiao/lunwen_17337.html