Project Title:

High-Temperature, Film-Based Polybenzoxazole/Polymide Microcomposite

04.01-3200
NAS3-25871
High-Temperature, Film-Based
	Polybenzoxazole/Polymide Microcomposite
	for Turbine Engines
Foster-Miller, Inc.
	350 Second Avenue
	Waltham, MA 02154-1196
		Ted E. Kirchner
(617-890-3200)

Abstract:

	High-temperature composites must be used extensively on aircraft turbine engines
to meet high thrust-to-weight requirements on all classes of next-generation aircraft.
This project will develop a film-based composite of PBO (poly p-phenylene benzobisoxazole)
and PMR-II that will have the properties of high-performance carbon composites without
the cost and microcracking associated with discrete-fiber and matrix composites.
The approach is to introduce the PMR-II into the PBO through an interpenetrating
network (IPN) process that assures a homogeneous microcomposite which is impermeable
and is highly resistant to delamination. The PBO/PMR-II laminate will be tested at
room temperature and up to 650K to verify its high-temperature performance. In the
Phase II program, we will bring in a turbine manufacturer to identify a suitable
component to fabricate with PBO/PMR-II.

Potential Commercial Application:

Potential Commercial Applications: Advanced aircraft turbine engine components could
be fabricated with high-temperature composites at considerable cost and weight savings.
This is also true with internal airframe structures for advanced supersonic aircraft
and hypersonic vehicles such as the National Aerospace Plane.