DSC AND TGA ANALYSIS
   
 
EXAMPLE RESIN GLASS TRANSITION
 
   
 
CIBA
BAKELITE
Onset: 52,04 °C
Onset: 47,61 °C
Midpoint: 55,66 °C
Midpoint: 50,13 °C
Inflect. Pt. 56,56 °C
Inflect. Pt. 51,35 °C
Endpoint: 59,71 °C
Endpoint: 52,38 °C
Inflect. Slp. -11,59e-03mWmin^-1
Inflect. Slp. -16,45-03mWmin^-1
   
 
EXAMPLE OF COMPOSITIONAL ANALYSIS BY TG
 
 

 

 
CIBA
BAKELITE
Step -41,202%
  -16,013 mg
Step -36,102%
  -12,553 mg
Residue 58,821%
  22,860 mg
Residue 63,924%
  22,226 mg
Inflect. Pt. 404,33 °C
Inflect. Pt. 391,00 °C
   
 

Polymers reinforced with fibers (e. g. glass or carbon fibers) are known as composites and have significantly improved properties in the direction of the fibers.
The sample (glass fiber reinforced epoxy resin) is pyrolyzed in nitrogen (first step).
The automatic gas change to air allows the combustion of carbon black formed.
The resin content is the sum of two steps (34,5%). The final residue is the glass fiber fraction and amounts to 64,8%.

N2 air: 200 mL/min

Heating rate: 20 K/min up to 600°C, 10 min isotherm.