New heat stable and processable poly(amide–ether–imide)s derived from 5-(4-trimellitimidophenoxy)-1-trimellitimido naphthalene and various diamines

Novel fluorinated polyimides derived from 9,9-bis(4-amino-3,5-difluorophenyl)fluorene and aromatic dianhydrides

“…Many attempts have been made to improve the processability of PIs without sacrificing their thermal and mechanical properties. During the past decades, some progress has been made in the chemical modification of the parent PIs structure to get more soluble polymer derivatives, for example, introducing the flexible linkages or geometrically asymmetric units, bulky lateral groups or noncoplanar structures into the polymer backbone [8][9][10][11][12][13][14][15]. It also has been demonstrated that incorporation of a cyclic side cardo group, such as a fluorene, a phenylcyclohexane, or an adamantane group, into the macromolecular backbone was quite effective to improve the solubility of PIs without deteriorating their inherent excellent properties [16][17][18][19][20][21][22].…”

Flip‐Flop einer Wasserstoffbrücke durch einen Bjerrum’schen Defekt

“…In our previous studies we successfully prepared a series of wholly aromatic polymers from a number of structurally modified monomers 31–39. As a continuation, in the present study, we report the synthesis and characterization of novel wholly aromatic polyamides derived from PPAPE and two simple aromatic comonomers.…”

Synthesis and characterization of new soluble thermally stable poly(azomethine-ether-imide)s: discerning the possibility for high temperature applications

“…It has been reported that the weight of the thermal residue up to 600°C or high temperature is related to flame retardancy of polymers. [30][31][32] The activation energy and enthalpy of the polyimides were calculated by using the reported method. [33] The values of activation energy and enthalpy fall in the range of 45.2-53.90 kJ/mol and 43.5-52.30 kJ/mol.…”