Hexcel® HexPly® M91 Epoxy Matrix

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Hexcel® HexPly® M91 Epoxy Matrix
Categories:	Polymer; Thermoset; Epoxy
Material Notes:	Description: HexPly® M91 is a high performance, very tough epoxy matrix for use in aerospace primary structures and engines. HexPly® M91 is a toughened, controlled flow, epoxy resin system supplied with unidirectional fibers. Benefits and Features Excellent toughness with very high residual compression strength after impact. Good translation of HexTow® fiber properties, both for intermediate modulus and high strength carbon fiber. Designed for automation and particularly suited for both automated tape laying (ATL) and advanced fiber placement (AFP) Good tack life and out-life, providing flexibility on the shop floor. Low exotherm behavior allowing simple cures of thick monolithic structures up to 70mm (2.76”) Dry Tg (DMA extrapolated onset E’) of 185°C-190°C (365°F-374°F) Good hot-wet performance up to 120°C (250°F) Information provided by Hexcel Corporation.
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Physical Properties	Original Value	Comments

Viscosity	10000 cP @Temperature 40.0 °C, Time 2700 sec	Monolithic Part < 15mm (0.6inch) thick
	10000 cP @Temperature 40.0 °C, Time 4500 sec	Monolithic Part 15mm-70mm (2.7inch) thick
	1.00e+6 cP @Temperature 120 °C, Time 0.000 sec	Monolithic Part < 15mm (0.6inch) thick
	1.00e+6 cP @Temperature 100 °C, Time 0.000 sec	Monolithic Part 15mm-70mm (2.7inch) thick
	1.00e+7 cP @Temperature 160 °C, Time 4860 sec	Monolithic Part < 15mm (0.6inch) thick
	1.00e+8 cP @Temperature 160 °C, Time 15000 sec	Monolithic Part 15mm-70mm (2.7inch) thick

Processing Properties	Original Value	Comments
Gel Time	20.0 min @Temperature 183 °C
	80.0 min @Temperature 149 °C
	180 min @Temperature 131 °C
Shelf Life	12.0 Month @Temperature -18.0 °C

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PHEXCB9170 / 322326

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