then PP-copolymer was degraded between ca. 390 ◦C and 500 ◦C, and
finally, by changing the inert atmosphere to oxidative atmosphere,
the char of wood flour burnt residue-free. With the atmosphere
change from nitrogen to oxygen for both ingredients wood flour
and polymer, a complete thermal degradation is ensured. In the literature,
mainly inert atmosphere is used because only one of the
ingredients (wood or polymer) is to be quantified