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Development and characterization of homo, co and terpolyimides based on BPDA, BTDA, 6FDA and ODA with low dielectric constant

  • Revathi Purushothaman EMAIL logo and I. Mohammed Bilal
Published/Copyright: August 21, 2014
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Journal of Polymer Engineering
From the journal Journal of Polymer Engineering Volume 34 Issue 9

Abstract

Polyimides are a sophisticated family of materials, which cover an exhaustive range of high performance polymers and find applications from aerospace to microelectronics. Microelectronic applications demand low dielectric constant and high performance. Aromatic terpolyimides were synthesized by reacting 3,3′,4,4′-biphenyl tetracarboxylic dianhydride (BPDA), 3,3′,4,4′-benzophenone tetracarboxylic dianhydride (BTDA) and 4,4′-(hexafluoroisopropylidene) diphthalic anhydride (6FDA) with 4,4′-oxydianiline (ODA) by thermal imidization with the view to decrease their dielectric constant without compromising thermal properties and mechanical properties compared to their homo and copolyimides. They were characterized by Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), differential scanning calorimetry (DSC) and X-ray diffraction (XRD). Their FTIR spectra established formation of polyimide by the characteristic vibrations at 1375 cm-1 (C-N stretch) and 1113 cm-1 (imide ring deformation). The TGA results showed decomposition of imides at about 515°C. The glass transition temperature (Tg) of the polymers varied from 261°C to 281°C. The XRD spectrum of BPDA/BTDA/6FDA-ODA, which contained 50% of 6FDA, showed a broadened envelope with a peak at 16.8° (2θ), illustrating a semicrystalline nature. Incorporation of 6FDA, with a bulky bridging group into the backbone of BPDA/6FDA-ODA and BPDA/BTDA/6FDA-ODA (0.25:0.25:0.5::1) caused a decrease in the dielectric constant (2.13 and 2.38, respectively). Such polyimides can find application in microelectronics such as flexible printed circuits and tape automated bonding applications.

Keywords: 4,4′-(hexafluoroisopropylidene) diphthalic anhydride; 4,4′-oxydianiline; dielectric constant; mechanical properties; terpolyimide
Corresponding author: Revathi Purushothaman, B.S. Abdur Rahman University, G.S.T. Road, Vandalur, Chennai 600 048, India, e-mail:

Acknowledgments

The authors are grateful to B.S. Abdur Rahman University for financial support. The technical support of Mr. Selvam, Anjan Chemicals, for FTIR, Dr. S. Rajendran and Dr. M. S. Pandian, Pondicherry University for XRD, Mr. Rohan Bosale, Hemetek Technologies for tensile properties, Dr. R. Vasanthakumari, B.S. Abdur Rahman University for DSC and TGA, and Dr. V. Geethaguru, Dr. M. Murugan, Mr. K. Gunasekar, Mr. T. Kannakaraj and Mr. R. Tamilselvan, B.S. Abdur Rahman University for their support in fabricating the solution casting machine and thickness measurements are greatly appreciated. Ms. H. Sofia is kindly acknowledged for correcting the English.

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Received: 2013-8-14
Accepted: 2014-7-6
Published Online: 2014-8-21
Published in Print: 2014-12-1

©2014 by De Gruyter

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https://doi.org/10.1515/polyeng-2013-0167
Keywords for this article
4,4′-(hexafluoroisopropylidene) diphthalic anhydride; 4,4′-oxydianiline; dielectric constant; mechanical properties; terpolyimide

Articles in the same Issue

  1. Frontmatter
  2. Original articles
  3. Curing kinetics of styrene-(ethylene-butylene)-styrene (SEBS) copolymer by peroxides in the presence of co-agents
  4. Synthesis and properties of novel high thermally stable polyimide-chrysotile composites as fire retardant materials
  5. Flame-resistant polymeric composite fibers based on nanocoating flame retardant: thermogravimetric study and production of α-Al2O3 nanoparticles by flame combustion
  6. Mechanical and morphological properties of high density polyethylene and polylactide blends
  7. Synthesis and characterization of magnetic Ni0.3 Zn0.7 Fe2 O4/polyvinyl acetate (PVAC) nanocomposite
  8. Effect of titanium nanofiller on the productivity and crystallinity of ethylene and propylene copolymer
  9. Mechanical properties of potassium hydroxide-pretreated Christmas palm fiber-reinforced polyester composites: characterization study, modeling and optimization
  10. Natural frequency response of laminated hybrid composite beams with and without cutouts
  11. Characterization of C2H2O4 doped PVA solid polymer electrolyte
  12. Development and characterization of homo, co and terpolyimides based on BPDA, BTDA, 6FDA and ODA with low dielectric constant
  13. Highly-filled hybrid composites prepared using centrifugal deposition
  14. Reinforcement of carboxylated acrylonitrile-butadiene rubber (XNBR) with graphene nanoplatelets with varying surface area
  15. Multiple melting behavior of poly(lactic acid)-hemp-silica composites using modulated-temperature differential scanning calorimetry
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