On the polynaphthalimide synthesis—influence of reaction conditions

Sulfonated naphthalenic polyimides containing ether and ketone linkages as polymer electrolyte membranes

“…Some interesting and useful results for SPIs were obtained by several research groups in recent years [13][14][15][16][17][18][19][20][21]. Mercier and co-workers reported the synthesis of a series of SPIs from 1,4,5,8-naphthalenetetracarboxylic dianhydride (NTDA) and the results indicated that NTDA-based six-membered ring polyimides were more stable than five-membered ring PIs under fuel-cell conditions [15].…”

Synthesis and properties of organosoluble polynaphthalimides bearing ether linkages and phthalide cardo groups

“…As shown in Scheme , the PNI homopolymers II a–g and copolymers III b–g were prepared by the high‐temperature solution polycondensation method. In this procedure, the dianhydride NTDA and the diamines were polymerized in m‐ cresol at 180°C, using isoquinoline as catalyst 23. Under these conditions, chain growth and imidization essentially occur spontaneously.…”

“…In this procedure, the dianhydride NTDA and the diamines were polymerized in m-cresol at 1808C, using isoquinoline as catalyst. 23 Under these conditions, chain growth and imidization essentially occur spontaneously. Depending on structure of the starting diamines, the polymerization reactions proceeded homogeneously or heterogeneously and led to the formation of the final PNIs.…”

Two‐step route polycondensation for polynaphthalimides synthesis through high molar mass soluble precursors: A kinetic study

“…Moreover, two research groups have published prominent studies concerning the optimization of the synthetic procedure of PNI, both regarding just to the formation of imide groups, emphasizing the need of such synthetic conditions. [15][16][17][18] However, the isolation of the PAA intermediate in a two-step polycondensation route represents a single opportunity to obtain a soluble polymeric precursor for PNI. To the best of our knowledge, the literature lacks studies on the kinetics of PAA formation, its neutralization and formation of a PAAS.…”