Effect of Residual Maleic Anhydride in PP-g-MAH on the Thermo-Oxidative Aging Properties of RGF-PP

Abstract

The mechanical, morphological and thermo-oxidative aging properties of the glass fiber reinforced polypropylene (RGF-PP) were studied based on four different maleic anhydride grafted polypropylene (PP-g-MAH) compatibilizers with different content of residual maleic anhydride (MAH). It was shown that PP-g-MAH compatibilizer could significantly improve the mechanical properties of RGF-PP, while from thermal and morphological analysis results, the content of residual MAH had negative influence on long term thermooxidative aging properties of RGF-PP with adding PP-g-MAH compatibilizer; the lower the residual content of MAH is, the better the thermo stability of the PP-g-MAH is, and also the better the thermo-oxidative aging properties was obtained.

Influence of thermo-oxidative aging on flame retardancy, thermal stability, and mechanical properties of long glass fiber–reinforced polypropylene composites filled with organic montmorillonite and intumescent flame retardant

“…40 The aging destroys the PP molecular chain structure at high temperature for a long time to promote the PP chain decomposition. 41 The corresponding elemental content obtained from SEM-EDS for the surfaces of OMMT/IFR/LGFPP composites is listed in Table 4. The selected areas of SEM-EDS on the surface of composites are exhibited in Figure 7.…”