Thermal properties and flame retardance of Al(OH)(3)/polypropylene composites modified by polypropylene crafting with acrylic acid

The effect of polypropylene grafting with acrylic acid, PP-g-AA (FPP), on c rystallization and melting behavior, thermal degradation, and limiting oxyg en index of Al(OH)(3)/PP composites were investigated. The results indicate d that crystallization temperature of PP shifted to high temperature with i ncreasing content of Al(OH)(3) because of the interfacial heterogeneous nuc leation of Al(OH)(3) and further increased by the addition of FPP and with increasing FPP content because of the improvement of the dispersion of Al(O H)(3) in PP matrix and the increase in the nucleating sites of Al(OH)(3). W ith adding Al(OH)(3) and increasing the content of Al(OH)(3), limiting oxyg en index values of composites increased and further improved by adding FPP. This is attributed to the presence of an interfacial interaction between F PP and Al(OH)(3). (C) 2001 John Wiley & Sons, Inc.