# Material Properties: Polystyrene

### Data Available:

• Thermal Conductivity
• Specific Heat
• Linear Expansion
 Thermal Conductivity density: 31.88 kg/m3 (=1.99 lb/ft3 Freon filled ) Thermal Conductivity density: 32.04 kg/m3 (=2.0 lb/ft3) Thermal Conductivity density: 49.98 kg/m3 (=3.12 lb/ft3) Thermal Conductivity density: 99.96 kg/m3 (=6.24 lb/ft3) UNITS W/(m-K) W/(m-K) W/(m-K) W/(m-K) a -1557.5 -1145.45 -1.5194 7.39582 b 3984.7 4086.02 -4.6449 -59.6737 c -3940.245 -6234.293 11.643 160.58 d 1649.668 5260.106 -15.969 -240.33 e 12.80097 -2649.914 12.722 218.817 f -294.2616 797.0372 -5.821 -124.155 g 119.5898 -132.5244 1.4174 42.9088 h -20.6301 9.3968 -0.14128 -8.26683 i 1.36067 0 0 0.68082 data range 90-300 33-300 7-300 4-300 equation range 90-300 25-300 4-300 4-300 curve fit % error relative to data 2 2 2 3
 Curve fit equation of the form: log10 y = a+b(log10T) + c(log10T) 2 + d(log10T) 3 + e(log10T) 4 + f(log10T) 5 + g(log10T) 6 + h(log10T) 7 + i(log10T) 8 Solves as: y = 10 a+b(log10T) + c(log10T) 2 + d(log10T) 3 + e(log10T) 4 + f(log10T) 5 + g(log10T) 6 + h(log10T) 7 + i(log10T) 8 Where: Coefficients a - i are summarized in the appropriate table and T is the temperature in K (x-axis), and y is the property to solve for.

See References

 Specific Heat density: 99.96 kg/m3 (=6.24 lb/ft3) Specific Heat density: 9.93 kg/m3 (=.062 lb/ft3) Specific Heat density: 60.07 kg/m3 (=3.75 lb/ft3) UNITS J/(kg-K) J/(kg-K) J/(kg-K) a -5911.474 -734.172 2139.33 b 14991.16 1163.613 -6518.015 c -15513.753 -135.157 9650.919 d 8232.5666 -878.514 -9229.889 e -2237.3586 791.787 6104.0571 f 225.423 -308.6236 -2739.14 g 20.33505 58.6764 784.878 h -4.6169 -4.4494 -128.40103 i 0 0 9.08405 data range 100-300 100-300 100-300 equation range 90-300 90-300 80-300 curve fit % error relative to data 1 1.5 1
 Curve fit equation of the form: log10 y = a+b(log10T) + c(log10T) 2 + d(log10T) 3 + e(log10T) 4 + f(log10T) 5 + g(log10T) 6 + h(log10T) 7 + i(log10T) 8 Solves as: y = 10 a+b(log10T) + c(log10T) 2 + d(log10T) 3 + e(log10T) 4 + f(log10T) 5 + g(log10T) 6 + h(log10T) 7 + i(log10T) 8 Where: Coefficients a - i are summarized in the appropriate table and T is the temperature in K (x-axis), and y is the property to solve for.

 Linear expansion density: 51.42 kg/m3 (=3.21 lb/ft3) Linear expansion density: 51.42 kg/m3 (=3.21 lb/ft3) Linear expansion density: 102.2 kg/m3 (=6.38 lb/ft3) Linear expansion density: 102.2 kg/m3 (=6.38 lb/ft3) .Units [(L-L293)/L293] x 105 unitless, eg. m/m [(L-L293)/L293] x 105 unitless, eg. m/m [(L-L293)/L293] x 105 unitless, eg. m/m [(L-L293)/L293] x 105 unitless, eg. m/m a -1.6948E3 -2.1168E3 -1.7494E3 -1.9374E3 b -9.6845E-1 1.0963E1 2.0607E0 3.6139E0 c 7.8268E-2 -3.5335E-2 -4.7467E-2 3.5974E-2 d -2.4831E-4 1.3552E-4 1.2156E-3 -1.5164E-4 e 0 -1.9890E-7 -5.4405E-6 2.1764E-7 Tlow (K) 6.4 NA NA NA f> -1697.9 NA NA NA data range (K) 4-300 4-300 4-300 4-300 equation range (K) 4-105 105-278 4-102 102-286 curve fit % error relative to data 1 1 1 2
 equation of the form: y = a + bT + cT 2 + dT 3 + eT 4 >T > Tlow y = f T < Tlow solves as expected: Where: Coefficients a-e are summarized in the appropriate table and T is the temperature in K (x-axis), and y is the property to solve for.

See References