Lessons Learned in the Processing of Polycyanurate Resin Composites
Abstract
Polycyanurate resins are a class of thermosetting polymers that have replaced epoxies as the matrix material of choice for structural composites used in space applications. Composites using a polycyanurate matrix are superior to those with epoxy matrices due to their increased toughness and dimensional stability, lower moisture absorption, reduced outgassing, and higher glass-transition temperatures. However, many of these superior properties are not always achieved due to difficulties that are commonly encountered during processing. This report discusses several cyanate ester monomers and resin blends commercially available, their polymerization behavior, and their properties. In addition, we focus on a number of issues encountered during the processing of these materials and how they were identified and resolved. The most notable problem with fl%is resin system is the inherent sensitivity of the monomer to moisture during processing. This affects the thermal and mechanical behavior of the resin and its resultant composites. In addition, the effects of cure schedule sensitivity are discussed.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 15, 2002
- Accession Number
- ADA400774
Entities
People
- R. J. Zaldivar
Organizations
- The Aerospace Corporation