- Author
-
Pollack, S. K.
|
Bullen, Y.
|
Fu, Z.
- Title
- Telechelic Aryl Cyanate Ester Siloxanes as Low Flammability Impact Modifiers for Cyanate Ester Resins.
- Coporate
- Howard Univ., Washington, DC
- Sponsor
- National Institute of Standards and Technology, Gaithersburg, MD
- Report
-
NISTIR 6242
October 1998
- Distribution
- Available from National Technical Information Service
- Contract
- NIST-GRANT-60NANB6D0016
- Book or Conf
- National Institute of Standards and Technology. Annual Conference on Fire Research: Book of Abstracts. November 2-5, 1998,
Gaithersburg, MD,
Beall, K. A., Editors,
45-46 p.,
1998
- Keywords
-
fire research
|
fire science
|
fire suppression
|
resins
|
esters
|
thermal stability
|
polymerization
- Abstract
- Cyanate ester resins (CERs) have found extensive use in applications where low-dielectric, high thermal stability materials are needed. Polymerization occurs by the cyclotrimerization of aryl cyante ester groups. These applications include printed wire circuit boards (PCWBs) and radomes. Recently, these resins have been proposed as materials for use as the matrix in structural composites used in civilian air transport. In this application, the organic materials must exhibit low flammability as well as having the appropriate strength and toughness for this type of application. CERs, by themselves possess appropriate flammability properties, but are too brittle for use alone as matrix materials for structure composites. However, their toughness can be greatly enhanced by the introduction of modifiers such as thermoplastics or elastomers. Siloxane based elastomers provide both the requisite improvement in toughness as well as having excellent flame retardency.