Nonisothermal crystallization and melting behavior of β-nucleated isotactic polypropylene and polyamide 66 blends

Z. Yang, K. Mai

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)

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 cp) of PP shifts to high temperature in the non-nucleated PP/PA66 blends because of the α-nucleating effect of PA66. T cp of 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.
Original languageEnglish
Pages (from-to)3566-3573
Number of pages8
JournalJournal of Applied Polymer Science
Volume119
Issue number6
DOIs
Publication statusPublished - 15 Mar 2011

Keywords

  • β-crystal
  • compatibilizer
  • crystallization and melting behavior
  • polyamide 66
  • polypropylene

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