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The Research on the Interfacial Adhesion of Polypropylene-Magesium Hydroxide Composite Modified by Different Compatibilizers

In order to investigate the effect of interfacial adhesion on phase morphology, crystallization behavior and tensile property of magnesium hydroxide filled polypropylene (PP/MH) composites, PP blends with compatibilizers, compatibilised and uncompatibilised PP/MH composites were prepared in this work. Three different types of compatibilizers namely, polypropylene grafted-maleic anhydride (PP-g-MA), ethylene-octene copolymer grafted with maleic anhydride (POE-g-MA) and ethylene-vinyl acetate copolymer grafted with maleic anhydride (EVA-g-MA) were used to control the interfacial adhesion among the components. SEM analysis revealed the formation of an encapsulation structure in PP/compatibilizer/MH composites. The interfacial tension (γAB) and wetting coefficient (ωα) results also confirmed the formation of encapsulation structure in these ternary composites. Addition of compatibilizers improved the interfacial adhesion between PP matrix and MH particles and resulted in improvement in tensile strength.