Preparations and properties of a high performance semicrystalline copolyimide and composites reinforced with glass fiber
Article first published online: 23 JAN 2014
Copyright © 2014 Wiley Periodicals, Inc.
Journal of Applied Polymer Science
Volume 131, Issue 12, June 15, 2014
How to Cite
2014). Preparations and properties of a high performance semicrystalline copolyimide and composites reinforced with glass fiber. J. Appl. Polym. Sci. 131, 40345, doi: 10.1002/app.40345, , , , and (
- Issue published online: 16 MAR 2014
- Article first published online: 23 JAN 2014
- Manuscript Accepted: 24 DEC 2013
- Manuscript Received: 14 JUL 2013
A semicrystalline copolyimide derived from 3,3′,4,4′-biphenyltetracarboxylic dianhydride (s-BPDA), 1,3-bis-(4-aminophenoxy)benzene (TPER), and 4,4′-oxydianiline (4,4′-ODA), end capped with phthalic anhydride (PA), was synthesized. Glass fiber reinforced composite was also prepared by impregnating powdery glass fiber with poly(amic acid) followed by solution imidization techniques. This copolyimide displayed a glass transition temperature of 202°C and a melting temperature of 373°C by differential scanning colorimeter (DSC). Crystallization and melting behaviors were investigated under nonisothermal and isothermal crystallization conditions. Double exothermic peaks were found by DSC when the copolyimide was cooled from the melt and multiple melting behaviors can be observed after the coployimide had been isothermally crystallized at different temperatures. Mechanical properties were investigated by dynamical mechanical analysis (DMA) and tensile experiments. The samples were cured at different temperatures and then tested at different temperatures. Results indicated that the copolyimide and the composite showed excellent mechanical properties. Additionally, this copolyimide also showed lower melt viscosity by rheological analysis. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 40345.