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HexPly® 954-3A is a 350ºF (177ºC) curing cyanate resin with a 400ºF (204ºC) glass transition temperature. Standard cure is two hours at 350ºF (177ºC). Glass transition temperatures can be maximized by a free-standing post cure at 450ºF (232ºC). HexPly® 954-3A is a controlled flow cyanate resin designed for autoclave and vacuum bag curing. HexPly® 954-3A can be impregnated on all available fibers and fabrics. The recommended lay-up procedure for HexPly® 954-3A is HSP-L3. The recommended cure procedure is HSP-C1. Typical applications for HexPly® 954-3A are primary and secondary space structures where dimensional stability and low moisture absorption are required.

Polymer Name: Cyanate Ester Resin

Functions: Prepreg

Processing Methods: Prepreg Processing

Technical Data Sheet
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Knowde Enhanced TDS

Identification & Functionality

Composite Materials Functions

Features & Benefits

Materials Features
Product Highlights
  • Low moisture absorption
  • Controlled flow
  • Good dimensional stability
  • 350ºF (177ºC) cure
  • Available in a broad range of reinforcements for both tapes and fabrics
  • Good microcracking resistance
  • Low outgassing

Applications & Uses

Composites Processing Methods

Properties

Physical Form
Neat Resin Properties
ValueUnitsTest Method / Conditions
Density1.19g/cc
Tensile Strength8.0 (56)ksi (Mpa)
Tensile Modulus0.47 (3.3)Msi (Gpa)
Tensile Ult. Strain1.9%
Flexural Strength12.6 (88)ksi (Mpa)
Flexural Modulus0.46 (3.2)Msi (Gpa)
Tg (DTMA)197°C
Tensile Strength10 (69)ksi (Mpa)
Tensile Modulus0.44 (3.0)Msi (Gpa)
Tensile Ult. Strain2.59%
Tensile Poisson Ratio0.38
Flexural Strength16.9 (117)ksi (Mpa)
Flexural Modulus0.44 (3.0)Msi (Gpa)
Tg (DMA- G’)191( 376)°C (°F)
Density1.24g/cc
CTE28.2μin/in-°F