Two kinds of thermotropic liquid crystalline polyesters (TLCP) with different chemical structures were used as flow modifiers during the melt spinning of poly (ether ether ketone). One of TLCPs, named PAT-S, was a kind of aromatic polyester synthesized from 4-acetoxybenzoicacid and 6-hydroxy-naphthoic acid, and the other one named, PEEKAR, was a block copolymer based on poly (ether ether ketene) (PEEK) oligomers and PAT-S oligomers. The effects of the chemical structures of the prepared TLCPs on the rheological behavior of the TLCP/PEEK blends were measured by rheological measurements, and then the structure and properties of the TLCP/PEEK in-situ blend fibers were studied by a series of methods, including differential scanning calorimetry (DSC), wide angle X-ray diffraction (WRXD), optical microscopy (OM), scanning electron microscopy (SEM), orientation degree tests, mechanical properties tests, etc. The results showed that the melt viscosity of PEEK could be effectively reduced by nearly 20% by adding a small amount of PEEKAR or PAT-S with the viscosity reducing effect of PEEKAR on PEEK being greater than that of PAT-S; this was mainly caused by the better compatibility between PEEK and PEEKAR because of the similar segment structures. The crystallinity of the PEEK fibers increased by nearly 50% with addition of both TLCPs, indicating that both the PEEKAR and PAT-S could serve as nucleating agent as well. The results from the morphology analysis clearly proved that PEEKAR had a better compatibility with the PEEK resin compared with PAT-S. The tensile strength of the PEEK fibers could be improved to some extent by adding PEEKAR, while it was obviously reduced after adding PAT-S.

在聚醚醚酮的熔融纺丝过程中，使用了两种化学结构不同的热致液晶聚酯（TLCP）作为流动改性剂。TLCP中的一种叫做PAT-S，是一种由4-乙酰氧基苯甲酸和6-羟基萘甲酸合成的芳香族聚酯，另一种是PEEKAR，是一种基于聚醚醚酮（PEEK）的嵌段共聚物。 ）低聚物和PAT-S低聚物。通过流变测量法测量了制备的TLCP的化学结构对TLCP / PEEK共混物流变行为的影响，然后通过一系列方法研究了TLCP / PEEK原位共混物纤维的结构和性能，包括差示扫描量热法（DSC），广角X射线衍射（WRXD），光学显微镜（OM），扫描电子显微镜（SEM），结果表明，加入少量的PEEKAR或PAT-S可以有效地将PEEK的熔融粘度降低近20％，而PEEKAR对PEEK的降粘作用大于PAT-S的；这主要是由于PEEK和PEEKAR之间具有相似的段结构，因此具有更好的兼容性。加入两种TLCP后，PEEK纤维的结晶度提高了近50％，这表明PEEKAR和PAT-S均可以用作成核剂。形态分析的结果清楚地证明，与PAT-S相比，PEEKAR与PEEK树脂具有更好的相容性。加入PEEKAR可以使PEEK纤维的拉伸强度有一定程度的提高，而加入PAT-S则明显降低。