Synthesis and Properties of Polymers and Copolymers Containing Polybenzimidazo benzophenanthroline and Polyimide Structures
Abstract
A high molecular weight benzimidazo benzophenanthroline (BB) polymer containing both the 'Bis-BB' (BBB) and the 'BB-Ladder' (BBL) polymer structures has been prepared. This BBB/BBL polymer was synthesized from 1,4,5,8-naphthalene tetracarboxylic acid (NTCA) and a stoichiometric mixture of 3,3'- diaminobenzidine (DAB) and 1,2,4,5-tetraaminobenzene tetrahydrochloride (TAB. 4HCl) by polycondensation in polyphosphoric acid. Using a conventional synthetic route for polymide formation a series of polymides containing five, six and seven-membered rings were prepared. Another series of polymers containing both the 'BB' structure and the imide structure were prepared by the condensation of NTCA with stoichiometric amounts of DAB (or TAB.4HCl) and either 4,4'- diaminobiphenylether (oxydianiline), m-phenylene diamine or 4,4'- diaminobiphenyl. Isothermal aging studies were performed and the polymers with mixed structures were found to be less resistant to a thermooxidative environment than the most stable parent homopolymers.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 1971
- Accession Number
- AD0881812
Entities
People
- John F. Coleman
- R. L. Van Deusen
Organizations
- Air Force Research Laboratory