摘要：聚酰亚胺是一种性能优异，应用领域极其广泛且具备良好发展前景的材料，但由于以往的聚酰亚胺的溶解度不佳、加工时候的温度很高以及其他的困难，故使其没能得到充分的应用。芳香二胺是合成聚酰亚胺的一种常用的二胺单体，为了改善聚酰亚胺的性能，考虑从单体聚合入手来改变聚酰亚胺分子主链，因此，改变单体的分子结构变得十分重要。本文主要通过在二胺单体中引进烷氧基改变其结构最终来提高聚酰亚胺的性能，主要以对硝基苯酚和1,2-二溴乙烷为原料探究了在SN2反应中反应物之间的摩尔比例、PH、温度的影响，最重要的是在第二步反应中考察了以NaBH4为还原剂，使用纳米银为催化剂，不同溶剂的选择、温度的变化和反应时间的长短对目标产物产率的影响。

关键词： 聚酰亚胺；二胺单体；合成

Synthesis of Novel Polyimide Monomer

Abstract : Polyimide is a kind of material with excellent performance, extremely wide application field and good development prospects. However, due to the poor solubility of conventional polyimides, high temperature during processing and other difficulties, It has not been fully applied. Aromatic diamine is a common diamine monomer for synthesizing polyimide. In order to improve the performance of polyimide, it is considered to change the main chain of polyimide molecule from monomer polymerization. Therefore, the monomer is changed. The molecular structure becomes very important. In this paper, the properties of polyimides were mainly improved by introducing alkoxy groups into the diamine monomers to change their structures. The reaction was mainly studied using p-nitrophenol and 1,2-dibromoethane as raw materials in the SN2 reaction. The effect of the molar ratio, pH, and temperature between the materials is most important in the second step in which NaBH4 was used as a reducing agent and nano silver was used as a catalyst to select different solvents, temperature changes, and reaction time. Effect on the yield of the target product.

Key words: Polyimide; Monomer; Synthesis

目录

1.绪论 1

1.1聚酰亚胺综述 1

1.2聚酰亚胺的分类 2

1.2.1热固型聚酰亚胺 2

1.2.2热塑性聚酰亚胺 2

1.3聚酰亚胺的性能及其应用 3

1.4聚酰亚胺及二胺单体的国内外研究 3

1.5SN2反应综述 5

1.6课题的研究目的、思路、主要内容、创新点及意义 5

1.6.1本课题的研究目的 5

1.6.2本课题的研究思路 6

1.6.3本课题的主要内容 6

1.6.4本课题的创新点 6

1.6.5本课题的研究意义 6

2.新型聚酰亚胺二胺单体的制备与表征 7

2.1引言 7

2.2实验 7

2.2.1实验合成路线 7

2.2.2实验仪器与药品 8

2.2.3实验步骤 9

2.2.4实验数据及分析 10

2.2.5实验方法讨论 13

2.2.6实验结果讨论 14

2.2.7实验影响因素