In contrast to results under exposure of PP-copolymer to oxygen atmosphere, the main thermal degradation of PP-copolymer (99.3 wt.%) under nitrogen atmosphere occurs in a narrow temperature region between 300 ◦C and 500 ◦C (Fig. 1; black curve).
In contrast to results under exposure of PP-copolymer to oxygenatmosphere, the main thermal degradation of PP-copolymer(99.3 wt.%) under nitrogen atmosphere occurs in a narrow temperatureregion between 300 ◦C and 500 ◦C (Fig. 1; black curve).