PMI structural foam is made of methacrylic acid (MAA) and methacrylonitrile (MAN) *** polymer foaming obtained by closed-cell, rigid rigid foam
MAA and MAN by free radical polymerization to get the MAA-MAN *** polymer sheet, in the 180-230 ° C foaming temperature, *** polymer in the pre-buried blowing agent gasification to produce the PMI The PMI foam sheet is produced by vaporization of the blowing agent pre-built in the *** polymer. While foaming at high temperature, adjacent cyano (-CN) and carboxyl (-COOH) groups in MAA-MAN*** polymer undergo nucleophilic addition reaction to form a cyclic imide structure, which has strong polarity and high stiffness to give PMI foam material good comprehensive performance.
Domestic PMI foam is currently the best to do is the Zhejiang Zhongke Hengtai, the Chinese Academy of Sciences Institute of Chemistry technology, a large number of domestic aerospace in use.
Currently, the best PMI foam in China is Zhejiang Zhongke Hengtai.