Polymerization of poly-(amic acid) ammonium salt in aqueous solution and its use in flexible printed circuit boards

Atomic oxygen effects on silvered polyimide films and their surface modification by poly(siloxane amic acid) ammonium salts

“…Compared to poly(amic acid), poly(amic acid) ammonium salt has hydrolytic stability and good solubility in some environmentally-friendly solvents. 23 Meanwhile, polysiloxane- block -polyimides possess good AO resistance, as reported in the literature. 20 Therefore, poly(siloxane amic acid) ammonium salts were synthesized and spun on the surface of R–Ag/PI at solid contents of 10 wt% and 20 wt%, and then imidized: 100 °C/1 h; 200 °C/1 h; 300 °C/1 h (see Schemes 2 and 3 ) to obtain a flexible organic coating that can protect the silvered polyimide from AO attack.…”

Eco-Friendly Water-Processable Polyimide Binders with High Adhesion to Silicon Anodes for Lithium-Ion Batteries

“…The free carboxylic acid group is transformed into carboxylate (-COO-) in aqueous solutions, which strongly interacts with SiNPs via a physical or chemical reaction [32,33]. The presence of DMIZ in W-PAmAS promotes polymerization in DI water by forming an ammonium salt with the carboxylate group of W-PAmA and acts as an organic base catalyst that decreases the thermal imidization temperature [34,35].…”

A water-borne photo-sensitive polyimide precursor for an eco-friendly process of preparing organic thin film transistors

“…Water-borne poly(amic acid) salts (W-PAASs) have been proposed for the preparation of polymeric precursors for PI via an eco-friendly process because of the use of water as a synthetic medium. 6,[29][30][31][32][33][34] This facile strategy provides a one-pot procedure for polymerizing dianhydride and diamine monomers in aqueous media with organic bases. The single-step reaction and use of water as a polymerizing medium provide economic and ecological efficiency.…”