Differential Scanning Calorimetry (DSC)
Differential Scanning Calorimetry (DSC)
Differential Scanning Calorimetry (DSC)
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M<strong>DSC</strong>: PET Heat Capacity During Glass<br />
Transition & Cold Crystallization<br />
Heat Capacity (J/g/°C)<br />
1.6<br />
1.5<br />
1.4<br />
1.3<br />
1.2<br />
1.1<br />
GLASS TRANSITION<br />
(Second-Order Transition)<br />
60 70 80 90 100 110 120 130<br />
Isothermal Epoxy Cure<br />
Nonrev. Heat Flow (mW)<br />
6<br />
4<br />
2<br />
0<br />
Isothermal 80°C<br />
helium purge<br />
±0.5°C amplltude<br />
60 second period<br />
Heat<br />
Capacity<br />
Temperature (°C)<br />
∆H of Cure<br />
COLD CRYSTALLIZATION<br />
(First-Order Transition)<br />
M<strong>DSC</strong> ±0.30°C, 40 sec. period<br />
1°C isothermal steps<br />
DMA 1Hz<br />
( ) E' (GPa)<br />
30<br />
20<br />
10<br />
0<br />
14.5<br />
14.0<br />
13.5<br />
13.0<br />
12.5<br />
12.0<br />
11.5<br />
( ) Heat Capacity (mJ/°C)
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