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Khalil Faghihi

Khalil Faghihi

Academic rank: Professor
ORCID: https://orcid.org/0000-0001-9884-1788
Education: PhD.
ScopusId: 6603751266
Faculty: Science
Address: Arak University
Phone:

Research

Title
New thermally stable poly(amide-imide)/ montmorillonite reinforced nanocomposite based on N ,N ′-pyrromellitoyl-bis-l-valine: synthesis and characterization
Type
JournalPaper
Keywords
montmorillonite; nanocomposite; poly(amideimide); polycondensation
Year
2014
Journal Science and Engineering of Composite Materials
DOI
Researchers Khalil Faghihi ، Narges Dehnavi ، Mohsen Hajibeygi

Abstract

Two new samples of poly(amide-imide) (PAI)/ nanocomposites reinforced montmorillonite containing N ,N ′-pyrromelitoyl-bis-l-valine moiety in the main chain were synthesized by a solution intercalation technique. PAI 3 as a source of polymer matrix was synthesized by the direct polycondensation reaction of N ,N ′-pyrromelitoylbis-l-valine 1 with 4,4′-diamino diphenyl ether 2 in the presence of triphenyl phosphite, CaCl2, pyridine and N -methyl-2-pyrrolidone. The morphology and structure of the resulting PAI-nanocomposite films 4a and 4b with 5% and 10% silicate particles were characterized by Fourier transform infrared spectroscopy, X-ray diffraction and scanning electron microscopy. The effect of clay dispersion and the interaction between clay and polymeric chains on the properties of nanocomposites films were investigated by using UV-visible spectroscopy, thermogravimetric analysis and differential scanning calorimetry.