between 300 ◦C and 500 ◦C. Wood degradation in the
temperature range from 200 ◦C until 350 ◦C is assigned to hemicellulose
and cellulose degradation and from 250 ◦C until 500 ◦C to
lignin degradation [14]. Wood and PP-copolymer degradation in
method no. 1 overlap between 200 ◦C and 350 ◦C which means that
step separation for wood and PP-copolymer could not be achieved
using method no. 1. However, when method no. 2 was used, first
wood flour was degraded between 200 ◦C and ca. 390 ◦C, then