Total Lacqrene® 2551 Medium Impact Polystyrene

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Total Lacqrene® 2551 Medium Impact Polystyrene (discontinued **)
Categories:	Polymer; Thermoplastic; Polystyrene (PS)
Material Notes:	LACQRENE® 2551 is a high heat resistance, medium impact polystyrene for injection molding. The very high Vicat Softening Point of this grade gives moldings of high rigidity and a good dimensional stability at high operating temperatures. The fast set-up of this grade allows for the production of thick molding with reduced sink marks. Application CD boxes, Disposable razors, Audio cassettes, Cosmetics packaging, Disposable cutlery Information provided provided by Total Petrochemicals. Total Petrochemicals includes former Fina and Atofina plastics product lines.
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Physical Properties	Original Value	Comments

Density	1.04 g/cc	ISO 1183
Water Absorption	<= 0.10 %	ISO 62
Linear Mold Shrinkage	0.0040 - 0.0070 cm/cm
Melt Flow	7.5 g/10 min @Load 5.00 kg, Temperature 200 °C	ISO 1133H

Mechanical Properties	Original Value	Comments
Hardness, Rockwell L	70	ISO 2039-2
Tensile Strength at Break	36.0 MPa	ISO 527-2
Tensile Strength, Yield	38.0 MPa	ISO 527-2
Elongation at Break	15 %	ISO 527-2
Tensile Modulus	2.40 GPa	ISO 527-2
Flexural Modulus	2.50 GPa	ISO 178
Izod Impact, Notched (ISO)	4.00 kJ/m²	ISO 180/1A
Charpy Impact, Notched	0.400 J/cm²	ISO 179/1eU

Electrical Properties	Original Value	Comments
Surface Resistivity per Square	>= 1.00e+13 ohm	ISO IEC93
Dielectric Strength	150 kV/mm

Thermal Properties	Original Value	Comments
CTE, linear	91.0 µm/m-°C @Temperature 20.0 °C
Deflection Temperature at 0.46 MPa (66 psi)	94.0 °C	Annealed; ISO 75-2B
Deflection Temperature at 1.8 MPa (264 psi)	77.0 °C	Unannealed; ISO 75-2A
Vicat Softening Point	95.0 °C	50N (T° increase = 5°C/h); ISO 306B50
	102 °C	10N (T° increase = 50°C/h); ISO 306A50

**
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