Overview of materials for Polystyrene, Extrusion Grade

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Overview of materials for Polystyrene, Extrusion Grade
Categories:	Polymer; Thermoplastic; Polystyrene (PS); Polystyrene, Extrusion Grade
Material Notes:	This property data is a summary of similar materials in the MatWeb database for the category "Polystyrene, Extrusion Grade". Each property range of values reported is minimum and maximum values of appropriate MatWeb entries. The comments report the average value, and number of data points used to calculate the average. The values are not necessarily typical of any specific grade, especially less common values and those that can be most affected by additives or processing methods.
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Physical Properties	Metric	English	Comments

Density	0.0300 - 1.20 g/cc	0.00108 - 0.0434 lb/in³	Average value: 0.814 g/cc Grade Count:56
Water Absorption	0.0300 - 1.50 %	0.0300 - 1.50 %	Average value: 0.522 % Grade Count:11
Moisture Absorption at Equilibrium	0.100 %	0.100 %	Average value: 0.100 % Grade Count:4
Particle Size	90.0 - 1600 µm	90.0 - 1600 µm	Average value: 1070 µm Grade Count:8
pH	6.50 - 7.50	6.50 - 7.50	Average value: 7.00 Grade Count:6
Linear Mold Shrinkage	0.00300 - 0.00800 cm/cm	0.00300 - 0.00800 in/in	Average value: 0.00530 cm/cm Grade Count:25
Melt Flow	0.300 - 23.0 g/10 min	0.300 - 23.0 g/10 min	Average value: 5.01 g/10 min Grade Count:45

Mechanical Properties	Metric	English	Comments
Hardness, Rockwell L	63.0 - 107	63.0 - 107	Average value: 92.3 Grade Count:3
Hardness, Rockwell M	40.0 - 78.0	40.0 - 78.0	Average value: 69.8 Grade Count:12
Ball Indentation Hardness	76.0 - 150 MPa	11000 - 21800 psi	Average value: 125 MPa Grade Count:3
Tensile Strength, Ultimate	0.100 - 53.0 MPa	14.5 - 7690 psi	Average value: 22.9 MPa Grade Count:41
Tensile Strength, Yield	5.20 - 52.4 MPa	754 - 7600 psi	Average value: 34.9 MPa Grade Count:27
Elongation at Break	1.00 - 70.0 %	1.00 - 70.0 %	Average value: 21.0 % Grade Count:40
Modulus of Elasticity	0.00300 - 3.40 GPa	0.435 - 493 ksi	Average value: 1.52 GPa Grade Count:29
Flexural Yield Strength	0.100 - 107 MPa	14.5 - 15500 psi	Average value: 46.1 MPa Grade Count:45
Flexural Modulus	0.976 - 3.45 GPa	142 - 500 ksi	Average value: 2.53 GPa Grade Count:46
Compressive Yield Strength	0.100 - 0.750 MPa	14.5 - 109 psi	Average value: 0.327 MPa Grade Count:16
Poissons Ratio	0.390 - 0.410	0.390 - 0.410	Average value: 0.395 Grade Count:4
Shear Strength	0.0350 - 0.390 MPa	5.08 - 56.6 psi	Average value: 0.171 MPa Grade Count:4
Izod Impact, Notched	0.160 - 2.14 J/cm	0.300 - 4.00 ft-lb/in	Average value: 0.753 J/cm Grade Count:32
	0.42712 - 0.800 J/cm @Temperature -17.8 - 0.000 °C	0.80017 - 1.50 ft-lb/in @Temperature 0.000 - 32.0 °F	Average value: 0.614 J/cm Grade Count:2
Charpy Impact Unnotched	0.600 J/cm² - NB	2.86 ft-lb/in² - NB	Average value: 1.55 J/cm² Grade Count:3
Tensile Impact Strength	2.09 - 4.80 kJ/m²	0.996 - 2.28 ft-lb/in²	Average value: 3.25 kJ/m² Grade Count:3

Electrical Properties	Metric	English	Comments
Electrical Resistivity	1000 - 1.00e+18 ohm-cm	1000 - 1.00e+18 ohm-cm	Average value: 1.18e+17 ohm-cm Grade Count:9
Surface Resistance	1000 - 1.00e+14 ohm	1000 - 1.00e+14 ohm	Average value: 1.75e+13 ohm Grade Count:10
Dielectric Constant	2.50	2.50	Average value: 2.50 Grade Count:9
Dielectric Strength	17.7 - 60.0 kV/mm	450 - 1520 kV/in	Average value: 22.6 kV/mm Grade Count:13

Thermal Properties	Metric	English	Comments
CTE, linear	50.0 - 90.0 µm/m-°C	27.8 - 50.0 µin/in-°F	Average value: 71.9 µm/m-°C Grade Count:15
CTE, linear, Transverse to Flow	60.0 µm/m-°C	33.3 µin/in-°F	Average value: 60.0 µm/m-°C Grade Count:3
Thermal Conductivity	0.0340 - 0.180 W/m-K	0.236 - 1.25 BTU-in/hr-ft²-°F	Average value: 0.0530 W/m-K Grade Count:10
	0.0250 - 0.0490 W/m-K @Temperature -60.0 - 70.0 °C	0.174 - 0.340 BTU-in/hr-ft²-°F @Temperature -76.0 - 158 °F	Average value: 0.0341 W/m-K Grade Count:13
	0.0230 - 0.0390 W/m-K @Temperature -60.0 - 70.0 °C	0.160 - 0.271 BTU-in/hr-ft²-°F @Temperature -76.0 - 158 °F	Average value: 0.0341 W/m-K Grade Count:1
	0.0230 - 0.0390 W/m-K @Thickness 50.0 - 100 mm	0.160 - 0.271 BTU-in/hr-ft²-°F @Thickness 1.97 - 3.94 in	Average value: 0.0341 W/m-K Grade Count:1
Maximum Service Temperature, Air	70.0 - 80.0 °C	158 - 176 °F	Average value: 71.7 °C Grade Count:11
Deflection Temperature at 0.46 MPa (66 psi)	84.0 - 97.8 °C	183 - 208 °F	Average value: 92.0 °C Grade Count:4
Deflection Temperature at 1.8 MPa (264 psi)	67.8 - 95.0 °C	154 - 203 °F	Average value: 83.7 °C Grade Count:29
Vicat Softening Point	76.0 - 146 °C	169 - 295 °F	Average value: 101 °C Grade Count:42
Heat Distortion Temperature	-1.11 - 95.6 °C	30.0 - 204 °F	Average value: 51.1 °C Grade Count:7
Minimum Service Temperature, Air	-60.0 °C	-76.0 °F	Average value: -60.0 °C Grade Count:9
Flammability, UL94	HB	HB	Grade Count:27
Flash Point	400 °C	752 °F	Average value: 400 °C Grade Count:9

Optical Properties	Metric	English	Comments
Refractive Index	1.59 - 1.59	1.59 - 1.59	Average value: 1.59 Grade Count:10
Transmission, Visible	85.0 - 90.0 %	85.0 - 90.0 %	Average value: 88.4 % Grade Count:11

Processing Properties	Metric	English	Comments
Melt Temperature	177 - 280 °C	351 - 536 °F	Average value: 217 °C Grade Count:6
Mold Temperature	10.0 - 65.6 °C	50.0 - 150 °F	Average value: 37.1 °C Grade Count:5
Moisture Content	0.100 %	0.100 %	Average value: 0.100 % Grade Count:3

Some of the values displayed above may have been converted from their original units and/or rounded in order to display the information in a consistent format. Users requiring more precise data for scientific or engineering calculations can click on the property value to see the original value as well as raw conversions to equivalent units. We advise that you only use the original value or one of its raw conversions in your calculations to minimize rounding error. We also ask that you refer to MatWeb's terms of use regarding this information. Click here to view all the property values for this datasheet as they were originally entered into MatWeb.

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