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High Modulus, High Temperature Glass Fibers For Reinforced Plastics

Report Number: WADD TR 60-24 Supplement I
Author: Machlan, G. R.
Author: Stalego, C. J.
Author: Tiede, R. L.
Author: Isham, A. B.
Author: Caramante, D. E.
Corporate Author: Owens-Corning Fiberglas Corp Granville OH
Laboratory: Materials Central
Date of Publication: 1960-12
Pages: 230
Contract: AF 33(616)-5802
Project: 7340
Task: 73400
AD Number: AD0490475

An exploratory research investigation to determine the feasibility of producing glass fibers which retain useful properties at temperatures up to 2500°F resulted in the development of fibers which had a strength of 110,000 psi at 1800°F, an elastic modulus of 12.8 x 106 psi at room temperature, and a specific gravity of 2.53.

A program to improve the strength properties of laminates made from the high modulus glass developed in Supplement I of the contract resulted in laminates which had wet strengths at least equivalent to similar ''E'' glass laminates and an increase of 34 per cent in wet flexural modulus.

A program to develop unidirectional, non-woven, preimpregnated reinforcement which would produce laminates having very high strength yielded laminates which had a dry flexural strength of 265,000 psi and a dry flexural modulus of 7.81 x 106 psi.

Lockheed Martin Missiles & Fire Control
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