Synthesis and characterization of novel polyimides derived from 1,1-bis[4-(4′-aminophenoxy)phenyl]-1- [3″,5″-bis(trifluoromethyl)phenyl]-2,2,2-trifluoroethane

Colorless and high organosoluble polyimides from 2,5-bis(3,4-dicarboxyphenoxy)-t-butylbenzene dianhydride and aromatic bis(ether amine)s bearing pendent trifluoromethyl groups

“…By introducing the ether chain [6][7][8] or bulky group [9,10], the aromatic polyimide can raise the flexibility of polymer, reduce the melting point or the glass transition temperature, and modify solubility while maintaining the thermomechanical properties. For optical applications, a number of very lightly colored to colorless transparent polyimide films have been synthesized and characterized.…”

High glass transition temperature bismaleimide‐triazine resins based on soluble amorphous bismaleimide monomer

“…Based on the structure-property relationship, the unsymmetrical molecular structure and bulky pendant group are helpful for improving the solubility of the molecules. [18][19][20][21] Chen et al reported a series of bismaleimides with a bulky phthalide group or unsymmetrical structure, which are soluble in organic solvents such as acetone, dichloromethane, and tetrahydrofuran. 22,23 9,10-Dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) has usually been used to improve the thermal performance and flame retardancy of materials.…”

Synthesis and characterization of fluorinated polyimides derived from novel unsymmetrical diamines

“…Thus, many studies have focused on designing such chemical structures of the rigid aromatic backbone so as to obtain aromatic polymers that are processable by conventional techniques, while maintaining desirable properties. For example, bulky lateral substituents [3][4][5], flexible linkages [6][7][8], noncoplanar biphenyl moieties [9,10] as well as unsymmetrical structures [11][12][13] have been used to enhance the solubility of aromatic polymers make them processability.…”