Evonik Cyrolon® AR Polycarbonate Sheet

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Evonik Cyrolon® AR Polycarbonate Sheet (discontinued **)
Categories:	Polymer; Thermoplastic; Polycarbonate (PC); Polycarbonate, Optical Grade
Material Notes:	Continuously manufactured sheet with better impact and heat resistance than typical acrylic sheet. Offers protection against weathering. Used for windows, skylights, signs, displays, vending machine panels, machine guards, safety glazing, and bus shelters. Information Provided by Evonik CYRO. The former Evonik Methacrylates business has been sold to Röhm GmbH, although this trade name was disontinued prior to the sale.
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Physical Properties	Original Value	Comments

Water Absorption	0.15 %	24 hrs, 23°C; ASTM D570

Mechanical Properties	Original Value	Comments
Hardness, Rockwell R	118	ASTM D785
Tensile Strength, Ultimate	65.0 MPa	ASTM D638
Elongation at Break	110 %	ASTM D638
Tensile Modulus	2.34 GPa	ASTM D638
Flexural Yield Strength	122 MPa	ASTM D790
Flexural Modulus	2.34 GPa	ASTM D790
Compressive Yield Strength	76.0 MPa	ASTM D695
Izod Impact, Notched	9.70 J/cm	ASTM D256
Impact Test	68.0 J @Thickness 3.00 mm	Instrumented dart; ASTM D3763

Electrical Properties	Original Value	Comments
Electrical Resistivity	1.00e+16 ohm-cm	ASTM D257
Dielectric Constant	3.0 @Frequency 60 Hz	ASTM D150
Dielectric Strength	15.0 kV/mm @Thickness 3.20 mm	Short Time; ASTM D149
Dissipation Factor	0.00090 @Frequency 60 Hz	ASTM D150

Thermal Properties	Original Value	Comments
CTE, linear	68.0 µm/m-°C @Temperature 20.0 °C	ASTM D696
Thermal Conductivity	0.190 W/m-K	ASTM C177
Deflection Temperature at 1.8 MPa (264 psi)	132 °C	ASTM D648
Vicat Softening Point	157 °C	ASTM D1525
Flammability, UL94	>= V-2	UL 94 V-2, or better, depending on thickness
Oxygen Index	26 %	ASTM D2863

Optical Properties	Original Value	Comments
Refractive Index	1.59	ASTM D542
Transmission, Visible	87 %	ASTM D1003

Processing Properties	Original Value	Comments
Processing Temperature	180 - 210 °C	forming temperature

**
Materials flagged as discontinued () are no longer part of the manufacturer’s standard product line according to our latest information. These materials may be available by special order, in distribution inventory, or reinstated as an active product. Data sheets from materials that are no longer available remain in MatWeb to assist users in finding replacement materials.

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