组分含量对聚醚聚氨酯网络体系力学性能的影响
关键词 聚醚型聚氨酯网络 力学性能 功能助剂 固化
毕业论文设计说明书外文摘要
Title Research on Effects of Component Content Exerting on the Mechanic Properties of Polyether-urethane Networks
Abstract
To enhance the mechanic properties of polyether-urethane networks, the factors were studied. Polyether-urethane networks prepared via one-step method were characterized by electronic testing machine and scanning electron microscope. The effects that stuffing size and component content exerted on polyether-urethane networks were also observed by using HAAKE torque rheometer. The results indicated that maximum load and tensile strength can be enhanced by adding a certain amount of functional agent and PET. 1g of dipentaerythritol and 5g of PET can lead to the best mechanical properties with maximum load, tensile strength and breaking elongation reaching 123.3N, 25.75MPa and 32.90% respectively. Cross-linking reaction was detected in the polymer blend at 50℃. And 6000-mesh stuffing contributed to the highest degree of curing ,while the degree of curing varied with the component content in the same way that of mechanical properties did with component content.
Keywords polyether-urethane networks mechanic properties functional agent curing condition
目 次
1 引言（或绪论） 1
1.1 聚醚型聚氨酯的结构与特性 1
1.2 聚醚型聚氨酯复合体系力学性能的影响因素 1
2 实验 5
2.1 实验原料5
2.2 原料的预处理5
2.3 原料的共混塑化 5
2.4压延成型 5
2.5 溶剂的驱除及体系的固化 5
2.6 测试与表征 6
3 结果与讨论7
3.1 聚醚聚氨酯的力学性能 7
3.2 聚醚聚氨酯样条的断面形态 9
3.3 熔体的加工稳定性和流变性 10
结论 17
致谢 18
参考文献19
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表3.9 15
1 引言（或绪论）
聚氨酯是主链上含有重复氨基甲酸酯基团的聚合物。作为一种新型的高分子材料，聚氨酯具有耐磨损、耐油、耐撕裂、耐化学腐蚀、与其它材质粘结性好、高弹性和吸震能力强等优异性能，被广泛用于工业、农业、医疗、交通、国防、航天航空等领域[1]。
聚醚型聚氨酯作为聚氨酯中的一种，可由聚醚多元醇和多异氰酸酯反应生成。在推进剂及发射药领域，聚醚型聚氨酯常作为粘结剂组分，由聚醚高分子材料通过与合适的固化剂、增塑剂、扩链剂交联形成高分子网络结构，所形成的网络骨架结构可赋予体系以良好的力学性能，特别是低温力学性能，从而使发射药兼具高能量和高强度的特质。
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