Synthesis and characterization of novel poly(amide-imide)s containing 1,3-diamino mesitylene moieties

Choonkeun Lee, N. Padmanabha Iyer, Kyungwook Min, Heyungsuk Pak, Haksoo Han

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

A series of poly(amide-imide)s were prepared using a new monomer, 1,3-bis(trimellitimido)-2,4,6-trimethyl benzene (BTB), with four different diamines: 1,4-phenylene diamine (PDA), 2,4-diamino mesitylene (DAM), 2,2′-dimethyl-4,4′-diamino biphenyl (DMDB), and 2,2′-bis(trifluoromethyl)-4,4′-diamino biphenyl (TFDB). They were prepared by the condensation method in N-methyl-2-pyrrolidinone (NMP) solvent using triphenyl phosphate and pyridine as condensing agents. The synthesized poly-(amide-imide)s were characterized by Fourier transform infrared and 1H NMR techniques. Films were prepared and characterized using DSC, thermogravimetric analysis (TGA), a prism coupler, and a film dielectric property analyzer. DSC measurement showed that the glass-transition temperatures of the polymers were in the range of 259-327°C. TGA analysis showed 5% weight loss, in the range of 472-514°C. The refractive index varied from 1.6004 to 1.6586 in the following increasing order: BTB-TFBM < BTB-DAM < BTB-DMDB < BTB-PDA. For the poly(amide-imide) films, the birefringence varied in the range of 0.0319-0.0580, in the following increasing order: BTB-DAM < BTB-TFBM < BTB-DMDB < BTB-PDA. The capacitance method showed that the dielectric constant of poly(amide-imide) varied with the diamine structure; no difference was found by the optical method.

Original languageEnglish
Pages (from-to)137-143
Number of pages7
JournalJournal of Polymer Science, Part A: Polymer Chemistry
Volume42
Issue number1
DOIs
Publication statusPublished - 2004 Jan 1

Fingerprint

Imides
Diamines
Amides
Thermogravimetric analysis
Prisms
Birefringence
Pyridine
Dielectric properties
Condensation
Benzene
Refractive index
Fourier transforms
Phosphates
Permittivity
Capacitance
Monomers
Nuclear magnetic resonance
Infrared radiation
Polymers
mesitylene

All Science Journal Classification (ASJC) codes

  • Polymers and Plastics
  • Organic Chemistry
  • Materials Chemistry

Cite this

Lee, Choonkeun ; Iyer, N. Padmanabha ; Min, Kyungwook ; Pak, Heyungsuk ; Han, Haksoo. / Synthesis and characterization of novel poly(amide-imide)s containing 1,3-diamino mesitylene moieties. In: Journal of Polymer Science, Part A: Polymer Chemistry. 2004 ; Vol. 42, No. 1. pp. 137-143.
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Synthesis and characterization of novel poly(amide-imide)s containing 1,3-diamino mesitylene moieties. / Lee, Choonkeun; Iyer, N. Padmanabha; Min, Kyungwook; Pak, Heyungsuk; Han, Haksoo.

In: Journal of Polymer Science, Part A: Polymer Chemistry, Vol. 42, No. 1, 01.01.2004, p. 137-143.

Research output: Contribution to journalArticle

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