Thermal and Mechanical Properties of Mylar (Polyethylene Terephthalate)

Density= 1.4 g/cc

T (K)

Thermal Expansion

Heat Capacity

Thermal Conductivity

Tensile Strength

Yield Strength

Young's Modulus

(%)

(J/gK)

(W/cmK)

(Psi)

373

1.360

1.24E+00

2.17E-03

360

1.140

1.24E+00

1.69E-03

340

0.800

1.24E+00

1.23E-03

320

0.460

1.24E+00

9.60E-04

2.00E+04

1.00E+06

300

0.120

1.19E+00

8.05E-04

2.10E+04

1.01E+06

293

0.000

1.17E+00

7.69E-04

2.15E+04

1.02E+06

273

-0.160

1.12E+00

7.06E-04

2.22E+04

1.03E+06

260

-0.300

1.07E+00

6.89E-04

2.30E+04

1.04E+06

240

-0.450

1.00E+00

6.96E-04

2.40E+04

1.06E+06

220

-0.550

9.30E-01

7.39E-04

2.51E+04

1.10E+06

200

-0.650

8.60E-01

8.16E-04

2.65E+04

1.16E+06

180

-0.720

9.29E-04

2.82E+04

1.25E+06

160

-0.780

1.07E-03

2.95E+04

1.35E+06

140

-0.850

1.24E-03

3.10E+04

1.45E+06

120

-0.900

1.41E-03

3.30E+04

1.57E+06

100

-0.950

1.54E-03

3.48E+04

1.70E+06

-1.000

1.57E-03

3.65E+04

1.85E+06

-1.050

1.44E-03

3.85E+04

2.01E+06

-1.070

1.16E-03

4.05E+04

-1.120

7.35E-04

4.30E+04

-1.140

4.79E-04

4.40E+04

4.2

-1.150

3.78E-04

4.50E+04

T(K) = Temperature in Kelvin, T(C) = Temperature in Celsius

T (C) = T (K) - 273

Thermal Expansion (%) = 100 x [L(T) - L(293)] / L(293)

Heat Capacity [=] 1 J/gK = 0.23864 BTU/lbm/F

Thermal Conductivity [=] 1 W/cmK = 57.77 BTU/hr/ft/F

Tensile and Yield Strengths- lower bound values given

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