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Properties of polyimide shells made using vapor phase deposition

Published online by Cambridge University Press:  31 January 2011

E. L. Alfonso ,
S. H. Chen ,
R. Q. Gram  and
D. R. Harding
E. L. Alfonso
Affiliation:
Laboratory For Laser Energetics, University of Rochester, Rochester, New York 14623-1299
S. H. Chen
Affiliation:
Laboratory For Laser Energetics, University of Rochester, Rochester, New York 14623-1299
R. Q. Gram
Affiliation:
Laboratory For Laser Energetics, University of Rochester, Rochester, New York 14623-1299
D. R. Harding
Affiliation:
Laboratory For Laser Energetics, University of Rochester, Rochester, New York 14623-1299
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Abstract

Hollow polyimide shells, to be used in inertial confinement fusion experiments, were fabricated by codepositing monomer precursors onto spherical mandrels. Polyimide shells with 700 to 950 μm diameters and 4 to 13 μm wall thicknesses were produced. The shell wall shrunk 20–30% due to imidization. Burst and buckle pressure tests on these shells yielded estimated mechanical strength properties: ∼ 15 GPa elastic modulus and ∼ 300 MPa tensile strength. The permeability of D2 through polyamic acid at 298 K was 7.4 × 10−17 mol · m/m2 · Pa · s and increased to 6.4 × 10−16 mol · m/m2 · Pa · s upon curing the shell to 150 °C. The permeability of D2 at 298 K through vapor-deposited polyimide flat films was 240 times greater than through polyamic acid.

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Type
Articles
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Journal of Materials Research , Volume 13 , Issue 10 , October 1998 , pp. 2988 - 3000
Copyright
Copyright © Materials Research Society 1998

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