4th State - Gas Plasma Treatment of Kevlar and Spectra Fabrics for Advanced Composites

Gas Plasma Treatment of Kevlar® and Spectra® Fabrics for Advanced Composites - Page 3

Table I
Kevlar 49 Composites
Style 120
normalized to 60% fiber volume

Lot	Fabric Treatment	Flexural Strength MPa	Flexural Modulus GPa	Interlaminar Shear Strength MPa
1	none	131.6	17.5
2	none	88.5	19.8
3	none	130.8	36.1
4	none	167.3	25.4
Mean		129.6	24.7
Std. Dev.		32.2	8.3



Lot	Fabric Treatment	Flexural Strength MPa	Flexural Modulus GPa	Interlaminar Shear Strength MPa
5	plasma treated	389.6	32.4	47.6
6	plasma treated	393.7	34.5	28.3
7	plasma treated	356.5	33.1	31.7
8	plasma treated	366.1	33.8	31.7
Mean		389.6	32.4	34.8
Std. Dev.		18.1	0.9	2.7

Table II
Properties of Spectra 900 / Epoxy Composites1
Fabric: 8 Harness Satin

Property	Plasma	Untreated

Fiber Volume (%)	70	67
Flexural Strength (MPa)	153	47
Flexural Modulus (GPa)	21	3
Interlaminar Shear Strength (MPa)	13	4

kevlar.gif (40612 bytes)

Plasma Fabric Treater
60" width capacity

Acknowledgements

The authors wish to thank Mr. Sean Johnson of YLA, Inc. for generating and providing the data on the Kevlar composites.

References

1. Kaplan, S.L., Rose, P.W., Nguyen, H.X. and Chang, H.W., Gas Plasma Treatment of Spectra Fiber, SAMPE Quarterly, Vol. 19, No. 4, July 1988

Kaplan, S.L., Rose, P.W., Nguyen, H.X. and Chang, H.W., Gas Plasma Treatment of Spectra Fiber, SAMPE Quarterly, Vol. 19, No. 4, July 1988