Preparation and characterization of polymides derived from bis(methoxycarbonyl)terephthaloyl chloride by interfacial condensation

✍ Scribed by Yaw-Terng Chern

• Publisher: John Wiley and Sons
• Year: 1995
• Tongue: English
• Weight: 468 KB
• Volume: 196
• Category: Article
• ISSN: 1022-1352
• DOI: 10.1002/macp.1995.021961012

✦ Synopsis

Abstract

A series of polyimides was synthesized by interfacial condensation of bis(methoxycarbonyl)terephthaloyl choride (1) with aromatic diamines and polycyclic aliphatic diamines. 1 (mixed isomers) was synthesized from pyromellitic dianhydride and contains about 60% para isomers and 40% meta isomer. The poly(amic ester)s 3 had inherent viscosities of 0.85–0.24 dL/g. All the poly(amic ester)s were soluble in NMP, DMAc, DMF, and DMSO, except for the polymer prepared from diamantane‐1,6‐diamine. Through thermal treatment the poly(amic‐ester)s formed imide structures. All the polyimides and poly(amic ester)s were amorphous due to X‐ray diffraction studies. The glass transition temperatures of these polyimides were in the range of 255–340°C, and the 5% weight loss temperatures were between 485 and 640 °C in nitrogen atmosphere. The polyimides (4c and 4d) with polycyclic aliphatic diamines such as adamantane‐1,3‐diamine and diamantane‐1,6‐diamine had good thermal stability, with a temperature of 5% weight loss above 485°C. The polyimides 4c and 4d also had high glass transition temperature of 340°C and 300°C, respectively.