Thermal degradation of PP/SCG composites at high temperatures
was followed by thermogravymetric analysis (TGA) in a TGA/
SDTA 851 (Mettler-Toledo Inc., Schwerzenbach, Switzerland).
Samples sizing 7e8 mg were placed in standard alumina crucibles
and subjected to a heating program from 30 C to 700 C at a
heating rate of 20 C min1 in nitrogen atmosphe