New thermally stable poly(amide-imide)/montmorillonite reinforced nanocomposite based on N,N′-pyrromellitoyl-bis-l-valine: synthesis and characterization

Science and Engineering of Composite Materials

Dehnavi Narges¹  Hajibeygi Mohsen²  Faghihi Khalil³ 

[1] Department of Chemistry, Arak Branch, Islamic Azad University, Arak, Iran;Department of Chemistry, Varamin Pishva Branch, Islamic Azad University, Varamin, Iran;Faculty of Science, Department of Chemistry, Arak University, Arak 38156-8-8349, Iran;

关键词: montmorillonite;    nanocomposite;    poly(amide-imide);    polycondensation;   

DOI  :  10.1515/secm-2012-0043

来源: DOAJ

【 摘 要 】

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′-pyrromelitoyl-bis-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.

【 授权许可】

Unknown