Study on Structure and Properties of PPTA Fibre at High Spinning Speed

The structure and properties of PPTA fibre changed with increasing take-up velocity and thereexisted a best spinning speed at a certain technology condition. We mainly compared the structureand properties of the fibre obtained at 400 m/min with that of the fibre at 150 m/min. We foundthat the modulus of PPTA fibre at the high take-up velocity was much higher than that at alow take-up velocity. But this difference in properties was less related to the morpholcgicalstructure and was dependent more on gathering structure of PPTA fibre. The research on mechanicalpropcrties of the lattice also showed that the lattice mechanical properties were able to change inaccordance with the different formation processes.