摘要为了提高发射药的力学性能,采用热塑性聚氨酯弹性体（聚醚多元醇和三元树脂作为软段）为粘结剂。本实验研究了聚氨酯粘结剂软段中组分配比对样品力学性能的影响。实验结果表明：与无聚氨酯粘结剂的样品相比，聚氨酯粘结剂的添加使材料的断裂伸长率增加了49。2%～102。7%；且聚醚多元醇对于双基复合材料韧性的增益效果要好于三元树脂。为了解决在预聚过程中重力作用导致的聚氨酯链段沉降、样品力学性能不均一的问题，本实验原创性地引入了旋转驱溶的方法。实验结果表明：旋转驱溶能提高样品的力学性能。DMA实验结果表明，三元树脂的动态柔性要好于聚醚多元醇。78026

毕业论文关键词  力学性能  粘结剂  三元树脂  旋转驱溶  动态柔性

毕业设计说明书外文摘要

Title  Research and Development on Mechanical Performance of Double-base Composites Reinforced by Polyurethane

Abstract In order to improve the mechanical performance of propellant, thermoplastic polyurethane elastomer (polyether polyol and ternary resin as soft segment) was used as an adhesive。 The research studied how the component ratio of soft segment of polyurethane adhesive had an impact on mechanical performance of the sample。 The results of the research show that compared with the sample without polyurethane adhesive, the elongation at break of the sample with PU adhesive added is enhanced by 49。2% to 102。7%; And polyether polyols make a further boost on the toughness of the sample materials in comparison with ternary resin。 In order to solve the problem of the sedimentation of PU segments caused by gravity and the subsequent problem of inhomogeneity of mechanical performance, the study introduced a method of rotating solvent-driving originally。 The experimental results show that the method of rotating solvent-driving can improve mechanical performance of the sample。 The DMA results show that ternary resin has better dynamic flexibility than polyether polyols。

Keywords   mechanical performance    adhesive    ternary resin

rotating solvent-driving    dynamic flexibility

目   录

1  引言 1

1。1  发射药概述与研究现状 1

1。2  聚氨酯粘结剂 2

1。2。1  聚氨酯预聚物的合成与固化原理 2

1。2。2  聚醚多元醇和三元树脂 3

2  实验 4

2。1  实验原理与方法 4

2。1。1  驱溶析出和基团沉降 4

2。1。2  旋转驱溶方法的引入 4

2。2  实验仪器与药剂 4

2。2。1  实验仪器 4

2。2。2  实验药剂 4

2。2。3  自搭建旋转驱溶装置 5

2。3  实验准备与操作步骤 6

2。3。1  实验准备 6

2。3。2  操作步骤 8

3  结果与分析 10

3。1  拉伸性能分析 10

3。1。1  旋转驱溶下不同原料配比的拉伸数据与分析 10

3。1。2  以是否进行旋转驱溶为变量的拉伸数据与分析