Overview of materials for Liquid Silicone Rubber

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Overview of materials for Liquid Silicone Rubber
Categories:	Polymer; Thermoset; Silicone; Silicone Rubber; Liquid Silicone Rubber (LSR)
Material Notes:	This property data is a summary of similar materials in the MatWeb database for the category "Liquid Silicone Rubber". 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	0.850 - 1.80 g/cc	0.0307 - 0.0650 lb/in³	Average value: 1.13 g/cc Grade Count:516
Viscosity	15.0 - 1.30e+7 cP	15.0 - 1.30e+7 cP	Average value: 569000 cP Grade Count:289
Linear Mold Shrinkage	0.00100 - 0.0350 cm/cm	0.00100 - 0.0350 in/in	Average value: 0.0285 cm/cm Grade Count:177

Mechanical Properties	Metric	English	Comments
Hardness, Shore A	1.00 - 90.0	1.00 - 90.0	Average value: 44.8 Grade Count:557
Hardness, Shore OO	30.0 - 50.0	30.0 - 50.0	Average value: 43.6 Grade Count:4
Tensile Strength, Ultimate	0.512 - 11.9 MPa	74.3 - 1730 psi	Average value: 7.32 MPa Grade Count:488
Elongation at Break	33.0 - 1450 %	33.0 - 1450 %	Average value: 509 % Grade Count:522
Elongation at Yield	230 - 900 %	230 - 900 %	Average value: 552 % Grade Count:30
Resilience	30.0 - 65.0	30.0 - 65.0	Average value: 51.3 Grade Count:6
Rebound	40.0 - 71.0 %	40.0 - 71.0 %	Average value: 59.7 % Grade Count:64
Tear Strength	1.93 - 103 kN/m	11.0 - 590 pli	Average value: 26.5 kN/m Grade Count:517
Compression Set	4.00 - 77.3 %	4.00 - 77.3 %	Average value: 22.6 % Grade Count:318
Tensile Set	2.00 - 8.00 %	2.00 - 8.00 %	Average value: 7.82 % Grade Count:31

Electrical Properties	Metric	English	Comments
Electrical Resistivity	0.100 - 6.00e+16 ohm-cm	0.100 - 6.00e+16 ohm-cm	Average value: 6.09e+15 ohm-cm Grade Count:73
Dielectric Constant	2.69 - 3.50	2.69 - 3.50	Average value: 2.83 Grade Count:48
Dielectric Strength	15.7 - 31.0 kV/mm	400 - 787 kV/in	Average value: 22.6 kV/mm Grade Count:60
Dissipation Factor	0.0000140 - 0.0150	0.0000140 - 0.0150	Average value: 0.00116 Grade Count:48

Thermal Properties	Metric	English	Comments
CTE, linear	275 - 320 µm/m-°C	153 - 178 µin/in-°F	Average value: 283 µm/m-°C Grade Count:12
	265 - 270 µm/m-°C @Temperature 40.0 - 90.0 °C	147 - 150 µin/in-°F @Temperature 104 - 194 °F	Average value: 268 µm/m-°C Grade Count:2
Specific Heat Capacity	0.700 - 1.26 J/g-°C	0.167 - 0.301 BTU/lb-°F	Average value: 0.867 J/g-°C Grade Count:10
Thermal Conductivity	0.180 - 0.200 W/m-K	1.25 - 1.39 BTU-in/hr-ft²-°F	Average value: 0.181 W/m-K Grade Count:14
Maximum Service Temperature, Air	175 - 300 °C	347 - 572 °F	Average value: 209 °C Grade Count:149
Minimum Service Temperature, Air	-60.0 - -40.0 °C	-76.0 - -40.0 °F	Average value: -54.7 °C Grade Count:108
Flammability, UL94	HB - V-0	HB - V-0	Grade Count:35

Optical Properties	Metric	English	Comments
Refractive Index	1.40 - 1.41	1.40 - 1.41	Average value: 1.41 Grade Count:19
Transmission, Visible	20.0 - 98.0 %	20.0 - 98.0 %	Average value: 70.9 % Grade Count:196

Processing Properties	Metric	English	Comments
Processing Temperature	130 - 175 °C	266 - 347 °F	Average value: 166 °C Grade Count:16
Nozzle Temperature	20.0 °C	68.0 °F	Average value: 20.0 °C Grade Count:111
Mold Temperature	140 - 230 °C	284 - 446 °F	Average value: 185 °C Grade Count:113
Injection Pressure	5.00 - 15.0 MPa	725 - 2180 psi	Average value: 10.0 MPa Grade Count:111
Cure Time	0.167 - 2880 min	0.00278 - 48.0 hour	Average value: 52.0 min Grade Count:126
	1.00 - 240 min @Temperature 60.0 - 200 °C	0.0167 - 4.00 hour @Temperature 140 - 392 °F	Average value: 22.5 min Grade Count:154
Pot Life	1.50 - 10100 min	1.50 - 10100 min	Average value: 2480 min Grade Count:80

Component Elements Properties	Metric	English	Comments
Loss on Ignition(%)	24.0 - 35.0 %	24.0 - 35.0 %	Average value: 28.8 % Grade Count:6

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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O5240a / 192628

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