Chi Mei Acrystex® PM-500G Optical SMMA Resin

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Chi Mei Acrystex® PM-500G Optical SMMA Resin
Categories:	Polymer; Thermoplastic; Polystyrene (PS); Styrene/Methyl Methacrylate Copolymer (SMMA)
Material Notes:	Optical grade resin with low melt volume-flow rate. Applications: Widely used in optical extrusion applications. Raw material used to make the diffuser for LCD back-lights. ACRYSTEX® Optical MS Resin is composed of methyl methacrylate (MMA) and styrene monomer (SM). It is anti-water-absorbent to provide dimensional stability, and features good weather resistance, high heat resistance, cleanliness, transparency and gloss, as well as stable physical, chemical, optical, and electrical properties. Information provided by Chi Mei Corporation
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Physical Properties	Original Value	Comments

Specific Gravity	1.11 g/cc	ISO 1183
Water Absorption	0.30 %	ISO 62
Linear Mold Shrinkage	0.0020 - 0.0060 cm/cm	ISO 294-4
Melt Flow	1.8 g/10 min @Load 5.00 kg, Temperature 200 °C	Melt Volume Rate (ml/10 min.); ISO 1133

Mechanical Properties	Original Value	Comments
Hardness, Rockwell M	78	ISO 2039
Tensile Strength at Break	64.0 MPa	5mm/min; ISO 527
Elongation at Break	5.0 %	5mm/min; ISO 527
Flexural Strength	88.0 MPa	2mm/min; ISO 178
Izod Impact, Notched (ISO)	2.00 kJ/m²	ISO 180/1A

Thermal Properties	Original Value	Comments
Deflection Temperature at 1.8 MPa (264 psi)	80.0 °C	unannealed; ISO 75
Vicat Softening Point	104 °C @Load 1.00 kg	50°C/hr; ISO 306
Flammability, UL94	HB @Thickness 1.50 mm	Fil No E56070, UL&C-UL

Optical Properties	Original Value	Comments
Refractive Index	1.55	ISO 489
Haze	0.50 % @Thickness 3.17 mm	ISO 14782
UV Transmittance	92 % @Thickness 3.17 mm	ISO 13468

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PCHI9916 / 280802

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