关键词:

聚甲醛, 热塑性聚氨酯弹性体, 形态结构, 力学性能, 相容性

Abstract:

The blends of polyoxymethylene (POM)/thermoplastic polyurethane elastomer (TPU) , POM/TPU/isocyanate oligomer (Z) and POM/TPU/Z/polyether were prepared by using twin-screw extruder.Mechanical properties, crystallization behavior and morphology were studied through mechanical properties testing, differential scanning calorimetry(DSC), polarizing microscopy (PLM), Fourier transform infrared spectrometer (FTIR)，scanning electron microscopy (SEM) and dynamic mechanic analysis (DMA).The results showed that with increasing content of TPU, elongation at break and notched impact strength of the blends increased.Z and polyether played an important role in promoting the dispersion of TPU in POM and enhancing compatibility of two phases.The crystallinity of POM in the blends decreased.Elongation at break and notched impact strength of the blends were improved.

Key words:

聚甲醛, 热塑性聚氨酯弹性体, 形态结构, 力学性能, 相容性