Melt compounding of polymeric nanocomposites

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Journal titleInternational Polymer Processing
Pages316; # of pages: 14
AbstractThe clay-containing polymeric nanocomposites (CPNC) can be visualized as binary mixtures of strongly interacting, inorganic, plate-like molecules dispersed in a polymeric matrix. To be successful, one must ascertain the thermodynamics, which controls CPNC structure on the molecular level. In this work dispersion of organoclay (Cloisite 15A, C15A) in polyamide 6 (PA 6) or in polypropylene (PP) is discussed. The PAbased CPNC’s contained two components: polymer and organoclay, whereas those based on PP in addition contained a mixture of two maleated polypropylene’s (PP-MA), as a compatibilizer. The melt compounding was carried out either in a single-screw extruder (SSE), or a twin-screw extruder (TSE). Both compounding lines were used with or without the extensional flow mixer (EFM). Furthermore, two versions of EFM were evaluated – one commercial, designed for polymer homogenization and blending, and the other designed for dispersing nano-particles. It was found that addition of EFM significantly improved clay dispersion. Better dispersion was found compounding the CPNC’s in a SSE + EFM than in TSE with or without EFM. The best results were obtained using SSE with the new EFM having a relatively small gap between the convergent-divergent plates. C15A was fully exfoliated in PA 6 matrix. The results in PP/PP-MA matrix were less spectacular, but again the highest degree of dispersion was obtained using SSE + new EFM with a small gap. Tensile, flexural and impact properties were measured and evaluated.
Publication date
AffiliationNational Research Council Canada (NRC-CNRC); NRC Industrial Materials Institute
Peer reviewedYes
NRC number48870
NPARC number15804307
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Record identifiere6b1061e-3783-4f1c-a66a-03a5ef058d9a
Record created2010-07-09
Record modified2016-05-09
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