摘要本文通过熔融共聚合的方法制备了聚酰胺 6/聚四氢呋喃（PA6-co-PTMG）低温 增韧共聚物。调节 PTMG 的加入量，研究材料的增韧效果。使用拉伸试验机测定了 材料的断裂强度、断裂伸长率以及断面的形态；采用热重分析（TG）对材料的热稳 定性进行了研究；通过差示扫描量热量热仪（DSC）测定了聚合物的熔点和结晶度； 应用傅里叶转变红外光谱分析（FTIR）对材料的特征基团进行了研究。78323

结果表明：纯 PA6 的断裂伸长率能够达到 77%，而改性后的共聚物的断裂伸长 率高达 800%甚至 1000%，材料的韧性显著地提高，到达了很好的增韧效果，但是 材料的拉伸强度也显著下降；加入 PTMG  改性的材料热稳定性有所降低，软段

（PTMG）含量越多，分解温度就越低；熔点和结晶度也随着软段含量的增加而降 低；在红外光谱图中发现了碳氧单键的吸收峰，表明 PA6 和 PTMG 发生了共聚。

毕业论文关键词：熔融共聚；PA6；聚四氢呋喃；改性

Abstract Polyamide6/polyfourhydrogenfuran (PA6-co-PTMG) copolymer with excellent toughness at low temperature toughened copolymer had been prepared via melting copolymerization。 The effect of the amount of PTMG on the toughness of PA6-co-PTMG was studied。 The breaking strength, elongation at break and the shape of the cross section were measured by tensile testing machine。 The thermal stability of the materials was studied by the thermal gravimetric analysis (TG)。 The melting point and crystallinity of the polymer were measured by differential scanning calorimetry (DSC)。 The characteristic groups of the materials were studied by Fourier transform infrared spectroscopy (FTIR)。

The results showed that pure nylon6 and the elongation at break can be reached to 77%,the elongation at break of the copolymer and the modified up to 800% or even 1000%, the toughness of the material have been improved significantly,arrived at the very good toughing effect ,but the tensile strength of the material also decreased significantly。 Addition of poly tetrahydrofuran instead of material thermal stability decreased, soft segment (PTMG) content of more, decomposition temperature is low;melting and crystallization degree with the increase of soft segment content decreased; in the infrared spectra of found of carbon oxygen single absorption peak and table Ming PA6 and PTMG copolymerization。

Keywords: melting copolymerization, polyamide6, polyfourhydrogenfuran, modification

目 录

第一章 绪论 1

1。1  引言 1

1。2  聚酰胺 6 2

1。2。1  聚酰胺的简介 2

1。2。2  聚酰胺 6 的性质 3

1。2。3  聚酰胺 6 的发展现状及趋势 6

1。3 PA6 的增韧改性 6

1。3。1  填充改性 7

1。3。2  共混改性 8

1。3。3  共聚改性 9

1。4  聚醚改性尼龙 10

1。4。1  聚醚改性尼龙的目的 10

1。4。2  聚醚改性尼龙的意义 10

1。4。3  聚醚改性尼龙的方法 10

1。5  本实验的研究目的和意义