Overview of materials for Polystyrene, Heat Resistant Grade

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Overview of materials for Polystyrene, Heat Resistant Grade
Categories:	Polymer; Thermoplastic; Polystyrene (PS); Polystyrene, Heat Resistant Grade
Material Notes:	This property data is a summary of similar materials in the MatWeb database for the category "Polystyrene, Heat Resistant 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	1.04 - 1.19 g/cc	0.0376 - 0.0430 lb/in³	Average value: 1.05 g/cc Grade Count:109
Water Absorption	0.000 - 0.100 %	0.000 - 0.100 %	Average value: 0.0433 % Grade Count:21
Moisture Absorption at Equilibrium	0.100 %	0.100 %	Average value: 0.100 % Grade Count:6
Water Absorption at Saturation	0.100 %	0.100 %	Average value: 0.100 % Grade Count:5
Maximum Moisture Content	0.0100	0.0100	Average value: 0.0100 Grade Count:4
Linear Mold Shrinkage	0.00200 - 0.0114 cm/cm	0.00200 - 0.0114 in/in	Average value: 0.00561 cm/cm Grade Count:90
Melt Flow	1.00 - 120 g/10 min	1.00 - 120 g/10 min	Average value: 7.49 g/10 min Grade Count:113
Spiral Flow	43.0 - 62.0 cm @Temperature 220 - 220 °C	16.9 - 24.4 in @Temperature 428 - 428 °F	Average value: 51.9 cm Grade Count:7

Mechanical Properties	Metric	English	Comments
Hardness, Rockwell L	40.0 - 110	40.0 - 110	Average value: 101 Grade Count:34
Hardness, Rockwell M	45.0 - 78.0	45.0 - 78.0	Average value: 74.3 Grade Count:22
Hardness, Rockwell R	91.0 - 121	91.0 - 121	Average value: 105 Grade Count:11
Ball Indentation Hardness	81.0 - 150 MPa	11700 - 21800 psi	Average value: 144 MPa Grade Count:12
Tensile Strength, Ultimate	22.0 - 62.0 MPa	3190 - 8990 psi	Average value: 47.1 MPa Grade Count:84
	18.0 - 18.0 MPa @Temperature 60.0 - 60.0 °C	2610 - 2610 psi @Temperature 140 - 140 °F	Average value: 18.0 MPa Grade Count:1
Tensile Strength, Yield	20.0 - 59.0 MPa	2900 - 8560 psi	Average value: 45.9 MPa Grade Count:51
Elongation at Break	1.80 - 60.0 %	1.80 - 60.0 %	Average value: 9.16 % Grade Count:102
Elongation at Yield	1.50 - 3.00 %	1.50 - 3.00 %	Average value: 2.15 % Grade Count:4
Modulus of Elasticity	1.79 - 3.38 GPa	260 - 490 ksi	Average value: 2.97 GPa Grade Count:89
Flexural Yield Strength	39.0 - 106 MPa	5660 - 15400 psi	Average value: 80.6 MPa Grade Count:73
Flexural Modulus	1.50 - 3.45 GPa	218 - 500 ksi	Average value: 3.02 GPa Grade Count:90
	1.90 - 1.90 GPa @Temperature 60.0 - 60.0 °C	276 - 276 ksi @Temperature 140 - 140 °F	Average value: 1.90 GPa Grade Count:1
Izod Impact, Notched	0.0981 - 1.30 J/cm	0.184 - 2.44 ft-lb/in	Average value: 0.280 J/cm Grade Count:71
	0.400 - 0.500 J/cm @Temperature -40.0 - -20.0 °C	0.749 - 0.937 ft-lb/in @Temperature -40.0 - -4.00 °F	Average value: 0.168 J/cm Grade Count:1
	0.0980665 - 0.0980665 J/cm @Temperature -30.0 - -30.0 °C	0.183719 - 0.183719 ft-lb/in @Temperature -22.0 - -22.0 °F	Average value: 0.168 J/cm Grade Count:4
	0.0980665 - 0.0980665 J/cm @Thickness 6.40 - 6.40 mm	0.183719 - 0.183719 ft-lb/in @Thickness 0.252 - 0.252 in	Average value: 0.168 J/cm Grade Count:4
Izod Impact, Notched (ISO)	1.50 - 10.0 kJ/m²	0.714 - 4.76 ft-lb/in²	Average value: 6.33 kJ/m² Grade Count:12
Izod Impact, Unnotched (ISO)	7.00 kJ/m² - NB	3.33 ft-lb/in² - NB	Average value: 10.2 kJ/m² Grade Count:6
Charpy Impact Unnotched	0.800 J/cm² - NB	3.81 ft-lb/in² - NB	Average value: 1.69 J/cm² Grade Count:22
	3.50 - 3.50 J/cm² @Temperature -40.0 - -20.0 °C	16.7 - 16.7 ft-lb/in² @Temperature -40.0 - -4.00 °F	Average value: 3.50 J/cm² Grade Count:1
Charpy Impact, Notched	0.100 - 0.900 J/cm²	0.476 - 4.28 ft-lb/in²	Average value: 0.325 J/cm² Grade Count:6
Tensile Creep Modulus, 1 hour	3300 MPa	479000 psi	Average value: 3300 MPa Grade Count:3
Tensile Creep Modulus, 1000 hours	2600 MPa	377000 psi	Average value: 2600 MPa Grade Count:3

Electrical Properties	Metric	English	Comments
Electrical Resistivity	1.00e+14 - 1.00e+18 ohm-cm	1.00e+14 - 1.00e+18 ohm-cm	Average value: 2.12e+17 ohm-cm Grade Count:24
Surface Resistance	1.00e+13 - 1.00e+15 ohm	1.00e+13 - 1.00e+15 ohm	Average value: 1.84e+14 ohm Grade Count:31
Dielectric Constant	2.00 - 2.70	2.00 - 2.70	Average value: 2.40 Grade Count:35
Dielectric Strength	19.7 - 160 kV/mm	500 - 4060 kV/in	Average value: 67.3 kV/mm Grade Count:47
Dissipation Factor	0.0000500 - 0.00200	0.0000500 - 0.00200	Average value: 0.000460 Grade Count:17
Arc Resistance	120 - 180 sec	120 - 180 sec	Average value: 150 sec Grade Count:4
Comparative Tracking Index	250 - 350 V	250 - 350 V	Average value: 308 V Grade Count:12
Hot Wire Ignition, HWI	7.00 - 30.0 sec	7.00 - 30.0 sec	Average value: 16.8 sec Grade Count:4
High Amp Arc Ignition, HAI	60.0 - 120 arcs	60.0 - 120 arcs	Average value: 105 arcs Grade Count:4
High Voltage Arc-Tracking Rate, HVTR	10.0 - 50.0 mm/min	0.394 - 1.97 in/min	Average value: 32.7 mm/min Grade Count:4

Thermal Properties	Metric	English	Comments
CTE, linear	50.0 - 91.0 µm/m-°C	27.8 - 50.6 µin/in-°F	Average value: 82.5 µm/m-°C Grade Count:55
Thermal Conductivity	0.123 - 0.170 W/m-K	0.854 - 1.18 BTU-in/hr-ft²-°F	Average value: 0.159 W/m-K Grade Count:6
Hot Ball Pressure Test	90.0 °C	194 °F	Average value: 90.0 °C Grade Count:4
Deflection Temperature at 0.46 MPa (66 psi)	82.8 - 187 °C	181 - 369 °F	Average value: 96.1 °C Grade Count:49
Deflection Temperature at 1.8 MPa (264 psi)	75.0 - 175 °C	167 - 347 °F	Average value: 89.4 °C Grade Count:101
Vicat Softening Point	85.0 - 210 °C	185 - 410 °F	Average value: 104 °C Grade Count:112
Heat Distortion Temperature	78.9 - 98.9 °C	174 - 210 °F	Average value: 84.8 °C Grade Count:10
Glass Transition Temp, Tg	89.0 - 104 °C	192 - 219 °F	Average value: 98.0 °C Grade Count:7
UL RTI, Electrical	50.0 °C	122 °F	Average value: 50.0 °C Grade Count:4
UL RTI, Mechanical with Impact	50.0 °C	122 °F	Average value: 50.0 °C Grade Count:4
UL RTI, Mechanical without Impact	50.0 °C	122 °F	Average value: 50.0 °C Grade Count:4
Flammability, UL94	HB - V-0	HB - V-0	Grade Count:52
Oxygen Index	18.0 %	18.0 %	Average value: 18.0 % Grade Count:7
Glow Wire Test	650 - 960 °C	1200 - 1760 °F	Average value: 783 °C Grade Count:6

Optical Properties	Metric	English	Comments
Refractive Index	1.59	1.59	Average value: 1.59 Grade Count:14
Optical Density	0.0460	0.0460	Average value: 0.0460 Grade Count:14
Haze	1.00 %	1.00 %	Average value: 1.00 % Grade Count:3
Transmission, Visible	88.0 - 90.0 %	88.0 - 90.0 %	Average value: 89.2 % Grade Count:18

Processing Properties	Metric	English	Comments
Processing Temperature	66.0 - 280 °C	151 - 536 °F	Average value: 180 °C Grade Count:4
Nozzle Temperature	190 - 245 °C	374 - 473 °F	Average value: 226 °C Grade Count:16
Die Temperature	199 - 232 °C	390 - 450 °F	Average value: 216 °C Grade Count:12
Melt Temperature	138 - 280 °C	280 - 536 °F	Average value: 212 °C Grade Count:53
Mold Temperature	10.0 - 82.0 °C	50.0 - 180 °F	Average value: 52.9 °C Grade Count:29
Injection Velocity	200 mm/sec	7.87 in/sec	Average value: 200 mm/sec Grade Count:3
Drying Temperature	60.0 - 80.0 °C	140 - 176 °F	Average value: 76.2 °C Grade Count:9

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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