Polycast® POLY 76
Polycast® POLY 76
Military Specification Sheet. MIL-PRF-8184.
General Description
POLY 76 is a crosslinked, preshrunk acrylic with excellent resistance to crazing, solvent attacks and dimensional change. As one of the few materials approved by the U.S. Military for use as stretched panels (MIL-PRF-25690), Poly 76 has numerous sophisticated applications for both military and commercial aircraft. It is also available in transparent colors. Poly 76 meets or exceeds all requirements of MIL-PRF-8184, Type I and II and Class 1.
Mechanical
| Properties | Test Method | Value | UOM |
|---|---|---|---|
| Barcol Hardness | ASTM D2583 | 50* | n/a |
| Compressive Deformation / (under load) 4000 psi, 122F, 24hr | ASTM D621 | 0.75 | % |
| Compressive Strength Modulus of Elasticity | ASTM D695 | 440,000 | psi |
| Compressive Strength Yield | ASTM D695 | 18,000 | psi |
| Craze Resistance / DRY IPA | MIL-P-8184 | 3,100 | psi |
| Craze Resistance / DRY Laquer Thinner | MIL-P-8184 | 3,150 | psi |
| Craze Resistance / DRY Sulfuric Acid | MIL-P-8184 | 1,285 | psi |
| Craze Resistance / WET IPA | MIL-P-8184 | 2,440 | psi |
| Craze Resistance / WET Laquer Thinner | MIL-P-8184 | 2,450 | psi |
| Craze Resistance / WET Sulfuric Acid | MIL-P-8184 | 500 | psi |
| Flexural Strength Modulus of Elasticity | ASTM D790 | 450,000 | psi |
| Flexural Strength Rupture | ASTM D790 | 15,250 | psi |
| Hardness (Rockwell) | ASTM D785 | M98* | n/a |
| Residual Shrinkage (Internal Strain) | ASTM D4802 | <1 | % |
| Shear Strength | ASTM D732 | 9,000 | psi |
| Specific Gravity | ASTM D792 | 1.19 | na |
| Tensile Strength Elongation, Rupture | ASTM D638 | 5 | % |
| Tensile Strength Modulus of Elasticity | ASTM D638 | 450,000 | psi |
| Tensile Strength Yield | ASTM D638 | 11,250 | psi |
| Water Absorption 26 Day Immersion | 26 Day Immersion | 0.8* | % |
Optical
| Properties | Test Method | Value | UOM |
|---|---|---|---|
| After 1,000 hr Accelerated Weathering Luminous Transmittance (total) | ASTM G26 | 91 | % |
| After 1,000 hr Accelerated Weathering Luminous Transmittance Haze | ASTM G26 | <0.75 | % |
| Luminous Transmittance (total) | ASTM D1003 | 92 | % |
| Luminous Transmittance Haze | ASTM D1003 | <0.5 | % |
| Refractive Index | ASTM D542 | 1.49 | n/a |
| Ultraviolet Transmission at 320nm | n/a | 0 | % |
Thermal
| Properties | Test Method | Value | UOM |
|---|---|---|---|
| Coefficient of Linear Thermal Expansion | ASTM D696 | 0.000042 | in/in/°F |
| Deflection Temperature Under Load | ASTM D648 | 235* | °F |
| Hot Forming Temp | n/a | 320* | °F |
| Max Recommended Continuous Service Temp | n/a | 180 | °F |
| SelfIgnition Temp | ASTM D1929 | 0.35 | °F |
| Thermal Relaxation 230 °F | MIL-P-25690 | 2.6 | % |
| Thermal Relaxation 293 °F | MIL-P-25690 | 0.2* | % |
Product Information
| Item | Description |
|---|---|
| Product Line | Polycast® |
| Item Code | Polycast® POLY 76 |
| Material Description | Cell Cast Acrylic |
| Product Description | Crosslinked, Preshrunk Acrylic Sheet |
| Characteristics | Increased weatherability, high solvent and craze resistance, and lower water absorption. |
Polymers
| Polymer Tag | Polymer Name |
|---|---|
| Acrylic | Methyl Methacrylate Monomers |
Related Documents
| Title | Open |
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| Polycast® Acryshield® Bullet Resistant Sheet | Open |
| Polycast® SAR® Super Abrasion-Resistant Acrylic | Open |
The above data are average values for Polycast® cell cast acrylic sheet and should not be used for any specific purpose. Spartech will furnish any additional information you may require.
Customers are responsible for determining whether products and information are appropriate for their use, including the evaluation of all applicable laws. Spartech LLC assumes no liability for the accuracy or completeness of information contained herein, and such information is subject to change without notice. All products supplied are subject to the standard terms and conditions of sale of Spartech LLC. NO WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED, IS MADE BY THIS TECHNICAL DATA SHEET. ALL IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE ARE EXPRESSLY EXCLUDED.