A new class of high Tg and organosoluble polynaphthalimides

• Published in: Polymer (Guilford) Vol. 48; no. 11; pp. 3082 - 3089
• Main Authors: Li, Wenmu, Zhang, Suobo, Chen, Guang, Zhang, Quanyuan
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier 01.05.2007
• Subjects: Applied sciences; Exact sciences and technology; Organic polymers; Physicochemistry of polymers; Polymers with particular properties; Preparation, kinetics, thermodynamics, mechanism and catalysts; Fluorine containing copolymer; Transport properties; Solution polycondensation; Self condensation; Fluorine containing polymer; Aromatic polymer; Mechanical properties; Experimental study; Thermal stability; Ketone copolymer; High performance polymer; Gas permeability; Etherimide copolymer; Dynamic mechanical properties; Preparation; Polynaphthalimides; Polyimides; Aromatic copolymer; Selective permeability; Soluble compound; Thermostable; Etherimide polymer
• ISSN: 0032-3861; 1873-2291
• DOI: 10.1016/j.polymer.2007.03.065

A new class of soluble six-membered ring polynaphthalimides (PNIs) was synthesized from asymmetrical fluorinated naphthalene-substituted monomers. All the resulting PNIs were easily soluble in many organic solvents, such as N-methyl-2-pyrrolidinone (NMP), N,N-dimethylacetamide (DMAc), dimethyl sulfoxide (DMSO), and chloroform. They also showed good thermal stability with glass transition temperature of 340-386 deg C, 10% weight loss temperature in excess of 529 deg C. Polyimide 3c could be solution-cast into tough and flexible film. The film had a tensile strength, elongation at break, and Young's modulus of about 117.6MPa, 23.6%, and 1.77GPa, respectively. The gas permeation property of the film of 3c was investigated with oxygen permeability coefficient (PO2=3.99) and permeability selectivity coefficient of oxygen to nitrogen (PO2/PN2=5.27). Therefore, these materials are expected to be a good alternative to PIs based on five-membered rings with applications in gas separation membranes.