PPTA (polyphenylene terephthalamide) pulp was prepared by semi-continuous direct polycondensation using a co-current rotating and meshing twin screw extruder as main reactor.

• 摘要以同向啮合旋转的双螺杆挤出机作为主反应器，采用半连续化直接缩聚法制备了PPTA浆粕。