Abstract
AbstractTo study the interaction between β‐nucleation agent and nano‐CaCO3 in iPP matrix, the dynamic rheology properties, crystallization and melting behaviors, impact fracture surface of β‐nucleation agent (β‐NA) nucleated and nano‐CaCO3 filled iPP were investigated in details in this study. Under suitable conditions, the β‐NA has a “promoting dispersion effect” on the dispersion of nano‐CaCO3 in PP matrix. However, 0.2 wt % β‐NA nucleated sample has a worse “promoting dispersion effect” than 0.05 wt % β‐NA nucleated sample at relatively high nano‐CaCO3 content (7.5 wt %). The reason is that 0.2 wt % β‐NA aggregates on the surface of nano‐CaCO3 agglomerations. The α crystals induced from β‐crystals grow more regular and perfect than conventional α crystals. For the relative fraction of β crystals (Kβ), the nano‐CaCO3 content has little influence on 0.05 wt % β‐NA nucleated samples, but obvious effect on 0.2 wt % β‐NA nucleated samples. Based on the investigated results, a mechanism model about the interaction between β‐nucleation agent and nano‐CaCO3 in iPP matrix is proposed. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013
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