Abstract:

The thermal liquid crystal polymer (TLCP) / Polyphenylene sulphide (PPS) in-situ microfibril forming hybrid fiber was prepared by melt spinning method. The formation of TLCP microfibrils enhance the mechanical properties of PPS matrix and optimize the spinning process. Considering that the actual spinning process is a non-isothermal crystallizing course, the non-isothermal crystallization kinetics of PPS/TLCP hybrid fibre was studied first. Differential scanning calorimetry (DSC) was used to investigate the influence of TLCP microfibrils on the crystallization of PPS matrix in accordance with non-isothermal crystallization and Jeziorny model was utilized to analyze the parameters. The results showed that the microfibrils of TLCP, which acted as a heterogeneous nucleation agent in the course of blending with linear PPS matrix, increased the onset crystallization temperature and lowered the half time， thus accelerated the crystallization process. Besides, the morphology of blend and the microfibrils of TLCP of hybrid fiber were observed through scanning electron microscope (SEM).