Chemical Modification of Fluorinated Polyimides: New Thermally Curing Hybrid-Polymers With POSS (PREPRINT)
Abstract
A series of four new end-capped and hydroxymethyl-functionalized polyimides were prepared. Through a two-step chemical modification process 3- aminopropylisobutyl-POSS was covalently attached to the polymer backbone. POSS loading levels as high as 40 wt-% could be obtained while maintaining excellent processability and optical clarity of thin films. Concurrent attachment of either a cyanate ester or hydroxyethyl methacrylate (HEMA) group afforded processable POSS-polyimides that underwent thermal curing to yield solvent resistant films, both having final Tg?s of 251 ?C. Kinetic analysis of the cure reactions yielded energy of activations of 93 kJ/mol (cyanate ester) and 103 kJ/mol (HEMA). Exposure of a POSS polyimide containing ~31 wt-% POSS to atomic oxygen displayed no measurable level of erosion relative to a Kapton? standard.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 15, 2006
- Accession Number
- ADA458338
Entities
People
- Amy Brunsvold
- Andrew J. Guenthner
- Brian J. Petteys
- Gregory R. Yandek
- Michael E. Wright
- Sandra J. Tomczak
- Stephen Fallis
- Timothy K. Minton
Organizations
- Air Force Research Laboratory