Overview of materials for Polystyrene, Impact Modified

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Overview of materials for Polystyrene, Impact Modified
Categories:	Polymer; Thermoplastic; Polystyrene (PS); Polystyrene, Impact Modified
Material Notes:	This property data is a summary of similar materials in the MatWeb database for the category "Polystyrene, Impact Modified". 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	0.650 - 2.12 g/cc	0.0235 - 0.0766 lb/in³	Average value: 1.05 g/cc Grade Count:469
Water Absorption	0.000 - 0.600 %	0.000 - 0.600 %	Average value: 0.0923 % Grade Count:92
Moisture Absorption at Equilibrium	0.0300 - 0.100 %	0.0300 - 0.100 %	Average value: 0.0957 % Grade Count:42
Water Absorption at Saturation	0.100 %	0.100 %	Average value: 0.100 % Grade Count:31
Particle Size	0.800 - 4000 µm	0.800 - 4000 µm	Average value: 1240 µm Grade Count:23
Maximum Moisture Content	0.0100	0.0100	Average value: 0.0100 Grade Count:8
Linear Mold Shrinkage	0.00200 - 0.0450 cm/cm	0.00200 - 0.0450 in/in	Average value: 0.00597 cm/cm Grade Count:278
Linear Mold Shrinkage, Transverse	0.00200 - 0.00600 cm/cm	0.00200 - 0.00600 in/in	Average value: 0.00467 cm/cm Grade Count:3
Melt Flow	0.900 - 99.0 g/10 min	0.900 - 99.0 g/10 min	Average value: 7.83 g/10 min Grade Count:524
Spiral Flow	44.0 - 45.0 cm @Temperature 220 - 220 °C	17.3 - 17.7 in @Temperature 428 - 428 °F	Average value: 44.5 cm Grade Count:2

Mechanical Properties	Metric	English	Comments
Hardness, Rockwell L	40.0 - 84.0	40.0 - 84.0	Average value: 58.9 Grade Count:69
Hardness, Rockwell M	32.0 - 103	32.0 - 103	Average value: 66.6 Grade Count:41
Hardness, Rockwell R	53.0 - 120	53.0 - 120	Average value: 94.2 Grade Count:86
Ball Indentation Hardness	60.0 - 110 MPa	8700 - 16000 psi	Average value: 79.5 MPa Grade Count:28
Tensile Strength, Ultimate	12.4 - 240 MPa	1800 - 34800 psi	Average value: 26.9 MPa Grade Count:278
Tensile Strength, Yield	2.35 - 200 MPa	341 - 29000 psi	Average value: 25.8 MPa Grade Count:388
Elongation at Break	1.30 - 350 %	1.30 - 350 %	Average value: 45.2 % Grade Count:451
Elongation at Yield	1.00 - 75.0 %	1.00 - 75.0 %	Average value: 15.3 % Grade Count:87
Modulus of Elasticity	0.155 - 3.47 GPa	22.5 - 503 ksi	Average value: 1.97 GPa Grade Count:300
Flexural Yield Strength	3.92 - 450 MPa	569 - 65300 psi	Average value: 45.8 MPa Grade Count:343
Flexural Modulus	0.686 - 22.5 GPa	99.6 - 3260 ksi	Average value: 2.12 GPa Grade Count:387
Izod Impact, Notched	0.0890 - 9.61 J/cm	0.167 - 18.0 ft-lb/in	Average value: 1.14 J/cm Grade Count:405
	0.42712 - 1.81526 J/cm @Temperature -50.0 - -17.8 °C	0.80017 - 3.40073 ft-lb/in @Temperature -58.0 - 0.000 °F	Average value: 0.537 J/cm Grade Count:16
	0.0640 - 0.85424 J/cm @Temperature -30.0 - -18.0 °C	0.120 - 1.6003 ft-lb/in @Temperature -22.0 - -0.400 °F	Average value: 0.537 J/cm Grade Count:10
	0.0640 - 0.85424 J/cm @Thickness 3.17 - 6.50 mm	0.120 - 1.6003 ft-lb/in @Thickness 0.125 - 0.256 in	Average value: 0.537 J/cm Grade Count:10
Izod Impact, Unnotched	0.801 - 5340 J/cm	1.50 - 10000 ft-lb/in	Average value: 4.13 J/cm Grade Count:25
Izod Impact, Notched (ISO)	2.00 - 14.0 kJ/m²	0.952 - 6.66 ft-lb/in²	Average value: 8.35 kJ/m² Grade Count:74
	5.00 - 7.00 kJ/m² @Temperature -30.0 - -30.0 °C	2.38 - 3.33 ft-lb/in² @Temperature -22.0 - -22.0 °F	Average value: 5.50 kJ/m² Grade Count:2
	3.50 - 6.50 kJ/m² @Temperature -30.0 - -30.0 °C	1.67 - 3.09 ft-lb/in² @Temperature -22.0 - -22.0 °F	Average value: 5.50 kJ/m² Grade Count:8
	3.50 - 6.50 kJ/m² @Thickness 4.00 - 4.00 mm	1.67 - 3.09 ft-lb/in² @Thickness 0.157 - 0.157 in	Average value: 5.50 kJ/m² Grade Count:8
Izod Impact, Unnotched (ISO)	3.00 kJ/m² - NB	1.43 ft-lb/in² - NB	Average value: 35.8 kJ/m² Grade Count:33
Charpy Impact Unnotched	0.500 J/cm² - NB	2.38 ft-lb/in² - NB	Average value: 7.65 J/cm² Grade Count:83
	2.50 J/cm² - NB @Temperature -40.0 - -30.0 °C	11.9 ft-lb/in² - NB @Temperature -40.0 - -22.0 °F	Average value: 8.55 J/cm² Grade Count:40
Charpy Impact, Notched	0.110 - 5.00 J/cm²	0.524 - 23.8 ft-lb/in²	Average value: 0.970 J/cm² Grade Count:88
	0.200 - 0.700 J/cm² @Temperature -40.0 - -30.0 °C	0.952 - 3.33 ft-lb/in² @Temperature -40.0 - -22.0 °F	Average value: 0.422 J/cm² Grade Count:12
Gardner Impact	1.69 - 36.2 J	1.25 - 26.7 ft-lb	Average value: 21.3 J Grade Count:20
Dart Drop, Total Energy	11.3 - 18.0 J	8.33 - 13.3 ft-lb	Average value: 14.3 J Grade Count:5
Falling Dart Impact	9.04 - 583 J	6.67 - 430 ft-lb	Average value: 55.6 J Grade Count:25
	528.77 - 528.77 J @Temperature -40.0 - -40.0 °C	390.00 - 390.00 ft-lb @Temperature -40.0 - -40.0 °F	Average value: 529 J Grade Count:1
Instrumented Impact Total Energy	9.15 - 39.6 J	6.75 - 29.2 ft-lb	Average value: 26.8 J Grade Count:4
Tensile Creep Modulus, 1 hour	1800 - 2200 MPa	261000 - 319000 psi	Average value: 2080 MPa Grade Count:5
Tensile Creep Modulus, 1000 hours	1300 - 1800 MPa	189000 - 261000 psi	Average value: 1630 MPa Grade Count:8

Electrical Properties	Metric	English	Comments
Electrical Resistivity	100 - 1.00e+18 ohm-cm	100 - 1.00e+18 ohm-cm	Average value: 1.08e+17 ohm-cm Grade Count:109
Surface Resistance	100 - 1.50e+15 ohm	100 - 1.50e+15 ohm	Average value: 3.29e+14 ohm Grade Count:91
Static Decay	0.0100 - 2.00 sec	0.0100 - 2.00 sec	Average value: 0.362 sec Grade Count:6
Dielectric Constant	2.00 - 3.00	2.00 - 3.00	Average value: 2.46 Grade Count:101
Dielectric Strength	15.7 - 155 kV/mm	400 - 3940 kV/in	Average value: 48.7 kV/mm Grade Count:121
Dissipation Factor	0.000100 - 0.00100	0.000100 - 0.00100	Average value: 0.000365 Grade Count:54
Arc Resistance	60.0 - 180 sec	60.0 - 180 sec	Average value: 119 sec Grade Count:16
Comparative Tracking Index	250 - 600 V	250 - 600 V	Average value: 454 V Grade Count:55
Hot Wire Ignition, HWI	7.00 - 60.0 sec	7.00 - 60.0 sec	Average value: 20.0 sec Grade Count:14
High Amp Arc Ignition, HAI	60.0 - 120 arcs	60.0 - 120 arcs	Average value: 112 arcs Grade Count:14
High Voltage Arc-Tracking Rate, HVTR	10.0 - 80.0 mm/min	0.394 - 3.15 in/min	Average value: 37.1 mm/min Grade Count:13

Thermal Properties	Metric	English	Comments
CTE, linear	7.20 - 100 µm/m-°C	4.00 - 55.6 µin/in-°F	Average value: 80.6 µm/m-°C Grade Count:138
Specific Heat Capacity	1.79 - 2.20 J/g-°C	0.428 - 0.526 BTU/lb-°F	Average value: 2.06 J/g-°C Grade Count:5
Thermal Conductivity	0.134 - 0.188 W/m-K	0.930 - 1.30 BTU-in/hr-ft²-°F	Average value: 0.169 W/m-K Grade Count:27
Maximum Service Temperature, Air	80.0 - 97.8 °C	176 - 208 °F	Average value: 91.6 °C Grade Count:15
Hot Ball Pressure Test	75.0 - 80.0 °C	167 - 176 °F	Average value: 78.3 °C Grade Count:3
Deflection Temperature at 0.46 MPa (66 psi)	60.0 - 104 °C	140 - 220 °F	Average value: 87.4 °C Grade Count:129
Deflection Temperature at 1.8 MPa (264 psi)	31.1 - 137 °C	88.0 - 279 °F	Average value: 81.9 °C Grade Count:383
Vicat Softening Point	35.0 - 113 °C	95.0 - 235 °F	Average value: 95.6 °C Grade Count:439
Heat Distortion Temperature	77.2 - 93.9 °C	171 - 201 °F	Average value: 87.0 °C Grade Count:11
UL RTI, Electrical	50.0 °C	122 °F	Average value: 50.0 °C Grade Count:8
UL RTI, Mechanical with Impact	50.0 °C	122 °F	Average value: 50.0 °C Grade Count:8
UL RTI, Mechanical without Impact	50.0 °C	122 °F	Average value: 50.0 °C Grade Count:8
Flammability, UL94	HB - 5VA	HB - 5VA	Grade Count:311
Flame Spread	28.0 - 34.0 mm/min	1.10 - 1.34 in/min	Average value: 29.3 mm/min Grade Count:6
Oxygen Index	18.0 %	18.0 %	Average value: 18.0 % Grade Count:19
Glow Wire Test	650 - 960 °C	1200 - 1760 °F	Average value: 707 °C Grade Count:19

Optical Properties	Metric	English	Comments
Haze	1.00 - 30.0 %	1.00 - 30.0 %	Average value: 5.47 % Grade Count:12
Gloss	9.00 - 98.0 %	9.00 - 98.0 %	Average value: 67.4 % Grade Count:103
Transmission, Visible	82.0 - 89.0 %	82.0 - 89.0 %	Average value: 86.6 % Grade Count:11

Processing Properties	Metric	English	Comments
Processing Temperature	95.6 - 280 °C	204 - 536 °F	Average value: 210 °C Grade Count:38
Nozzle Temperature	188 - 260 °C	370 - 500 °F	Average value: 221 °C Grade Count:26
Die Temperature	199 - 232 °C	390 - 450 °F	Average value: 216 °C Grade Count:8
Melt Temperature	80.0 - 300 °C	176 - 572 °F	Average value: 217 °C Grade Count:182
Mold Temperature	4.00 - 100 °C	39.2 - 212 °F	Average value: 49.2 °C Grade Count:150
Injection Velocity	200 mm/sec	7.87 in/sec	Average value: 200 mm/sec Grade Count:10
Drying Temperature	60.0 - 160 °C	140 - 320 °F	Average value: 79.4 °C Grade Count:54
Moisture Content	0.100 - 0.250 %	0.100 - 0.250 %	Average value: 0.194 % Grade Count:8
Injection Pressure	2.76 - 137 MPa	400 - 19900 psi	Average value: 77.7 MPa Grade Count:11

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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