The effects of reactive compatibilization on morphology, mechanical properties, rheological behavior, and dynamically mechanical behavior of high-density polyethylene (HDPE>)/CaCO3, HDPE/STC (a mixture of sericit, tridymite, and cristobalite), and HDPE/illite were studied through scanning electron microscopy, DMTA, and mechanical and melt rheological properties tests. The experimental results show that the presence of a small amount of ethylene–acrylic acid copolymer (EAA) results in a large increase of yield strength of HDPE/CaCO3, HDPE/STC, and HDPE/illite and a slight increase of their viscosity, as well as enhancement of the γ relaxation peak of HDPE and corresponding temperature shifts to higher temperature. The yield strength and impact strength of HDPE/illite (80/20) increase by 18% and 160%, respectively, in the presence of 1 wt% EAA. These are due to the interface enhancement of HDPE/fillers through the reaction of the carboxylic acid group in EAA with fillers.
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Guo et al. (2000) studied this question.
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