NOVA Chemicals DYLARK® 238 Impact Grade Engineering Resin

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NOVA Chemicals DYLARK® 238 Impact Grade Engineering Resin
Categories:	Polymer; Thermoplastic; Polystyrene (PS); Polystyrene, Impact Modified
Material Notes:	Features: High heat resistance Good chemical resistance High impact strength Excellent flow characteristics Applications: Automotive interior trim applications Automotive consoles Structural Housings Information provided by Nova Chemicals INEOS NOVA began October 1 2007 as an expansion of the 50:50 joint venture between NOVA Chemicals and INEOS to include North American assets.
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Physical Properties	Metric	English	Comments

Specific Gravity	1.08 g/cc	1.08 g/cc	ISO 1183
Linear Mold Shrinkage	0.0050 cm/cm	0.0050 in/in	ISO 2577
Melt Flow	1.8 g/10 min @Load 2.16 kg, Temperature 230 °C	1.8 g/10 min @Load 4.76 lb, Temperature 446 °F	ISO 1133

Mechanical Properties	Metric	English	Comments
Tensile Strength, Ultimate	43.0 MPa	6240 psi	ISO 527-2
Elongation at Break	8.0 %	8.0 %	ISO 527-2
Tensile Modulus	3.00 GPa	435 ksi	ISO 527-2
Flexural Strength	87.0 MPa	12600 psi	ISO 178
Flexural Modulus	3.20 GPa	464 ksi	ISO 178
Izod Impact, Notched (ISO)	2.00 kJ/m²	0.952 ft-lb/in²	ISO 180/1A

Thermal Properties	Metric	English	Comments
CTE, linear	72.0 µm/m-°C @Temperature 20.0 °C	40.0 µin/in-°F @Temperature 68.0 °F	NOVA Chemicals Laboratory Procedure
Deflection Temperature at 1.8 MPa (264 psi)	98.0 °C @Diameter 4.00 mm	208 °F @Diameter 0.157 in	Unannealed; bar; ISO 75-2

Processing Properties	Metric	English	Comments
Processing Temperature	177 - 260 °C	351 - 500 °F	Profile temperatures
Melt Temperature	204 - 260 °C	399 - 500 °F	air purge at equilibrium conditions
Mold Temperature	43.0 - 60.0 °C	109 - 140 °F	Core surface temp. at equilibrium
	54.0 - 71.0 °C	129 - 160 °F	Cavity surface temp. at equilibrium
Back Pressure	0.345 - 0.689 MPa	50.0 - 100 psi	Typically 50 psi
Screw Speed	40 - 80 rpm	40 - 80 rpm

Descriptive Properties
Injection Speed	medium-fast		Typically fast

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PNOV947 / 54893

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