EVALUATION BY ON-LINE FTIR OF THE KINETICS OF PP/PA6 BLEND COMPATIBILIZATION WITH PP-g-MAH DURING EXTRUSION

摘要

The on-line evaluation of the effects of process conditions variation during the extrusion process on the kinetics of compatibilization of polyamide 6 (PA6) in a matrix of polypropylene (PP) compatibilized with polypropylene grafted with maleic anhydride (PP-g-MAH) in different locations along the extruder by infrared (FTIR) spectroscopy is proposed in this work.As preliminary results and as a basis for comparing the on-line results that will be shown in the presentation the evolution of dispersion of the second phase of PA6 in the PP matrix is presented here.The area ratio of the peak of carbonyl stretching in amide present in PA6 at 1640 cm-1 standardized to the IR area of the peak at 1170 cm-1 relative to PP is applied to evaluate the evolution of dispersion along the extruder and the effect of the process condition in it.The standard deviation (s.d.) of the area ratio was used to correlate to the changes in dispersion condition when the process temperature,the feed rate and the screw speed were varied.