FTIR&ATR analyses on a polypropylene (pp) surface after plasma treatment in the study of chitosan surface grafting to improve PP dyeing behaviour

This study consisted in working on the treatment of a polypropylene (PP) film surface to improve its dyeing behaviour. A plasma treatment was carried out to try to create oxidizing groups on this surface, so that it could be then easier to apply a specific polysaccharide: chitosan which is reported to be much more reactive than PP and easy to dye. A study about the various parameters of the plasma instrument was necessary to find the optimal treatment. The possible formed oxidizing groups were emphasized by FTIR&ATR analyses. Chitosan was applied after the plasma treatment and the dyeing result which was then observed, was quite encouraging in certain conditions.