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以ε-己内酰胺、己二酸和聚四氢呋喃醚为原料采用二步法熔融聚合了系列聚酰胺6-聚醚酯弹性体(PEEA)。通过傅里叶变换红外光谱(FT-IR)和核磁共振(1 H-NMR)确定了该系列聚合物的化学结构,并采用差热-热重测定仪(DTG)和差示扫描量热仪(DSC),动态力学测试仪(DMTA)和万能拉伸仪分别表征了其热性能和机械性能。结果表明,PEEA热塑性弹性体熔点约为100℃,热分解5%时的温度为370℃,最低使用温度下限可达到-60℃,且室温条件下断裂伸长和断裂强度分别可达到2000%和16MPa,是一种较好的高韧性抗寒耐热弹性体材料。此外,实验证实可以通过调节PEEA的软硬段的比例实现弹性体材料性能的可控制备。
Polyamide 6-polyetherester elastomer (PEEA) was melt-polymerized by two-step method using ε-caprolactam, adipic acid and polytetrahydrofuran ether as raw materials. The chemical structure of this series of polymers was confirmed by Fourier transform infrared spectroscopy (FT-IR) and nuclear magnetic resonance (1 H-NMR). The chemical structures of the polymers were characterized by DTA-DTG and differential scanning calorimeter (DSC), dynamic mechanical tester (DMTA) and universal tensile tester respectively characterize their thermal and mechanical properties. The results show that the melting point of PEEA thermoplastic elastomer is about 100 ℃, the temperature at 5% thermal decomposition is 370 ℃, the minimum temperature can reach -60 ℃, and the elongation at break and the breaking strength at room temperature can reach 2000% and 16MPa, is a good high toughness cold heat-resistant elastomer material. In addition, the experiment confirmed that by adjusting the proportion of soft and hard PEEA segments to achieve elastomeric material properties of controlled preparation.