Röhm Plexiglas® 7H PMMA Molding Compound

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Röhm Plexiglas® 7H PMMA Molding Compound
Categories:	Polymer; Thermoplastic; Acrylic (PMMA); Acrylic, General Purpose, Molded
Material Notes:	Description: PLEXIGLAS® 7H and PLEXIGLAS® 8H are molding compounds based on polymethyl methacrylate (PMMA). The special properties of these standard PLEXIGLAS® molding compounds are: high melt strength high mechanical strength, surface hardness and abrasion resistance high light transmission excellent weather resistance free colorability due to crystal clarity The special properties of PLEXIGLAS® 7H are: very good mechanical properties high heat deflection temperature high melt strength AMECA listing. Application: Used for extruding optical and technical profiles and sheets. Information provided by manufacture. The former Evonik Methacrylates business has been sold to Röhm GmbH (Roehm).
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Physical Properties	Metric	English	Comments

Density	1.19 g/cc	0.0430 lb/in³	ISO 1183
Melt Flow	1.67 g/10 min @Load 3.80 kg, Temperature 230 °C	1.67 g/10 min @Load 8.38 lb, Temperature 446 °F	ISO 1133

Mechanical Properties	Metric	English	Comments
Tensile Strength at Break	76.0 MPa	11000 psi	5 mm/min; ISO 527
Elongation at Break	5.5 %	5.5 %	5 mm/min; ISO 527
Tensile Modulus	3.20 GPa	464 ksi	1 mm/min; ISO 527
Charpy Impact Unnotched	2.00 J/cm² @Temperature 23.0 °C	9.52 ft-lb/in² @Temperature 73.4 °F	ISO 179

Thermal Properties	Metric	English	Comments
CTE, linear	80.0 µm/m-°C @Temperature 0.000 - 50.0 °C	44.4 µin/in-°F @Temperature 32.0 - 122 °F	ASTM E831
Deflection Temperature at 0.46 MPa (66 psi)	100 °C	212 °F	ISO 75
Deflection Temperature at 1.8 MPa (264 psi)	95.0 °C	203 °F	ISO 75
Vicat Softening Point	103 °C	217 °F	B50; ISO 306
Glass Transition Temp, Tg	112 °C	234 °F	IEC 10006
Flammability, UL94	HB @Thickness 1.60 mm	HB @Thickness 0.0630 in	IEC 707

Optical Properties	Metric	English	Comments
Refractive Index	1.49	1.49	ISO 489
Haze	<= 0.50 %	<= 0.50 %	ASTM D1003
Transmission, Visible	92 %	92 %	Transmission Factor; DIN 5036

Processing Properties	Metric	English	Comments
Processing Temperature	220 - 260 °C	428 - 500 °F	Barrel Temperature
Die Temperature	220 - 260 °C	428 - 500 °F
Melt Temperature	220 - 260 °C	428 - 500 °F
Drying Temperature	<= 93.0 °C	<= 199 °F	Predrying
Dry Time	2 - 3 hour	2 - 3 hour	Desiccant-type drier

Descriptive Properties
Fire Rating	B2		DIN 4102

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