Infrared (FTIR) Spectroscop y
PP and HDPE samples were analysed separately by spectrophotometry
using the Fourier transform infrared (FTIR)
method. A spectrophotometer of the type Nicolet, model
Impact, with a measurement range of 400 to 4000 cm-1
was used. This spectrophotometer required the samples
be ground to powder and pressed to tablets of defined
dimensions in a potassium bromide (KBr) matrix. The
measurements were carried out in threefold for all samples.