Preparation and characterization of poly(imide-amide)s by interfacial condensation

✍ Scribed by Yaw-Terng Chern

• Publisher: John Wiley and Sons
• Year: 1996
• Tongue: English
• Weight: 479 KB
• Volume: 34
• Category: Article
• ISSN: 0887-624X
• DOI: 10.1002/(sici)1099-0518(19960115)34:1<133::aid-pola14>3.0.co;2-m

✦ Synopsis

SYNOPSIS

A series of poly(imide-amide)s were synthesized by interfacial condensation of carbomethoxy-iso/terephthaloyl chlorides (I) with aromatic diamines and polycyclic aliphatic diamines. Carbomethoxy-iso/terephthaloyl chlorides, containing approximately 50% para isomer and 50% meta isomer, were synthesized from trimellitic anhydride. The intermediates poly(amide-amic ester)s I11 had inherent viscosity of 0.1-0.36 dL/g. All poly(amide-amic ester)s were soluble in NMP, DMAc, DMF, and DMSO, except the polymer prepared from 1,6-diaminodiamantane. The poly(amide-amic ester)s were thermally treated to form poly(imide-amide)s. Most of poly(imide-amide)s showed amorphous patterns in x-ray diffraction studies. The glass transition temperatures of these poly(imide-amide)s were in the range of 255-319"C, and the 5% weight loss temperatures in TGA were in the range of 465-540°C in nitrogen. The poly(imide-amide)s (IVc and IVd) from polycyclic aliphatic diamines such as 1,3-diaminoadamantane and 1,6-diaminodiamantane, had good thermal stability, with the temperature at 5% weight loss above 465°C. The poly(imide-amide)s (IVc and IVd) also had high glass transition at 294" and 291"C, respectively. 0 1996 John Wiley & Sons, Inc.