摘要
The morphology of PPTA pulp is investigated by means of optical microscope and scanningelectron microscope (SEM). It shows that PPTA pulp has feather-like branch, needle point-likeend, and irregular cross-section, which are very important for PPTA pulp as a reinforcer. Theseparation limitation of PPTA pulp is also investigated from both torn and brittle break cross-sec-tion. A packing mechanism is proposed to illustrate the microfibril packing in the gel system.
The morphology of PPTA pulp is investigated by means of optical microscope and scanning electron microscope (SEM). It shows that PPTA pulp has feather-like branch, needle point-like end, and irregular cross-section, which are very important for PPTA pulp as a reinforcer. The separation limitation of PPTA pulp is also investigated from both torn and brittle break cross-sec- tion. A packing mechanism is proposed to illustrate the microfibril packing in the gel system.
