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Nonisothermal crystallization and melting behavior of β‐nucleated isotactic polypropylene and polyamide 66 blends
Author(s) -
Yang Zhugen,
Mai Kancheng
Publication year - 2010
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.33040
Subject(s) - materials science , maleic anhydride , tacticity , crystallization , polyamide , polypropylene , differential scanning calorimetry , polyethylene , polymer chemistry , composite material , polymer blend , nucleation , chemical engineering , polymer , copolymer , polymerization , organic chemistry , chemistry , physics , engineering , thermodynamics
Abstract A highly novel nano‐CaCO 3 supported β‐nucleating agent was employed to prepare β‐nucleated isotactic polypropylene (iPP) blend with polyamide (PA) 66, β‐nucleated iPP/PA66 blend, as well as its compatibilized version with maleic anhydride grafted PP (PP‐ g ‐MA), maleic anhydride grafted polyethylene‐octene (POE ‐g‐ MA), and polyethylene‐vinyl acetate (EVA ‐g‐ MA), respectively. Nonisothermal crystallization behavior and melting characteristics of β‐nucleated iPP and its blends were investigated by differential scanning calorimeter and wide angle X‐ray diffraction. Experimental results indicated that the crystallization temperature ( T c p ) of PP shifts to high temperature in the non‐nucleated PP/PA66 blends because of the α‐nucleating effect of PA66. T c pof PP and the β‐crystal content ( K β ) in β‐nucleated iPP/PA66 blends not only depended on the PA66 content, but also on the compatibilizer type. Addition of PP‐ g ‐MA and POE ‐g‐ MA into β‐nucleated iPP/PA66 blends increased the β‐crystal content; however, EVA ‐g‐ MA is not benefit for the formation of β‐crystal in the compatibilized β‐nucleated iPP/PA66 blend. It can be relative to the different interfacial interactions between PP and compatibilizers. The nonisothermal crystallization kinetics of PP in the blends was evaluated by Mo's method. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2011