低熔体黏度聚醚醚酮的合成与性能

Synthesis and Performance of Poly( ether ether ketone) s with Low Melt Viscosity

高性能聚合物及其复合材料因优异的热性能和机械性能备受关注[1-4]．高性能聚合物分子链的芳香性结构使其具有优异的性能，但分子链的刚性结构导致热塑性高性能聚合物具有很高的熔体黏度，限制了其应用．聚醚醚酮连续纤维增强复合材料因熔体黏度高而难以预浸[5-8]．为了降低聚醚醚酮的熔体黏度，人们进行了大量的实验探索．

A novel approach was presented on lowering the high processing viscosity of poly （ether ether ketone） s （PEEK）. The commercial PEEK and poly （ ether ether ether ketone） s-poly （ ether ketone） s （ PEEEK- PEK） were synthesized via a typical procedure. Compared to PEEK, PEEEK-PEK had the same molar ratio of ether and ketone linkages but in different linkage sequencing. Results of the DSC, DMA, TGA and Stress- strain tests indicated that the two copolymers performed close thermal and mechanical properties. Moreover, the rheological behavior was particularly investigated and it occurred that the melt viscosity of PEEEK-PEK exhibited around 50% lower than that of PEEK according to the dynamic shear theological tests at the rate of 100 rad/s.