公开(公告)号：US20220145007A1

公开(公告)日：2022-05-12

申请号：US17477927

申请日：2021-09-17

Applicant: Zhengzhou University

Inventor： Minying LIU ,  Bingfeng XUE ,  Peng FU ,  Zhe CUI ,  Xiaomeng ZHANG ,  Wei ZHAO ,  Xinchang PANG ,  Qingxiang ZHAO

IPC: C08G69/30

Abstract: The disclosure relates to a synthesis method of long carbon chain semi-aromatic nylon. The synthesis method comprises the following steps: mixing a wet powdery nylon salt, an antioxidant, a catalyst, a surfactant and pellets, and carrying out a one-step solid state polymerization under dynamic mixing to obtain a powdery nylon; under dynamic mixing, enabling the pellets to promote the stirring and mixing of the material and reducing material adhesion to the wall; the one-step solid state polymerization comprises a pre-solid state polymerization and a post-solid state polymerization; in the pre-solid state polymerization, ensuring the nylon salt and the prepolymer not to be molten; in the post-solid state polymerization, gradually reducing the system pressure to vacuum, and keeping the system pressure in vacuum state for at least 1 hour; the temperature of the post-solid state polymerization is not lower than the termination temperature of the pre-solid state polymerization.