Characterization of PET nanocomposites produced by different melt-based production methods

Poly(ethylene terephthalate) (PET) based nanocomposites containing 3 wt % of different nanoparticles (MontMorilloniTe-MMT; titanium dioxide-TiO₂; and silica dioxide-SiO₂) were prepared via two independent procedures: mechanical mixing with subsequent direct injection molding (DIM) and mechanical mix...

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Bibliographic Details
Published in:	Journal of applied polymer science Vol. 106; no. 3; pp. 1659 - 1669
Main Authors:	Todorov, L.V, Viana, J.C
Format:	Journal Article
Language:	English
Published:	Hoboken Wiley Subscription Services, Inc., A Wiley Company 05-11-2007 Wiley
Subjects:	Applied sciences Composites Exact sciences and technology Forms of application and semi-finished materials nanocomposites physical properties poly(ethylene terephthalate) Polymer industry, paints, wood processing Technology of polymers Ethylene terephthalate polymer Titanium IV Oxides physical properties Transparency Dispersion degree Intrinsic viscosity Dispersion reinforced material Property processing relationship Silica nanocomposites Composite material Optical properties Nanocomposite poly(ethylene terephthalate) Clay Elastic modulus Montmorillonite Ester polymer Mechanical properties Tensile property Experimental study Structure processing relationship Gloss Morphology Injection molding Extrusion processing Esthetic properties Rheological properties
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Summary:	Poly(ethylene terephthalate) (PET) based nanocomposites containing 3 wt % of different nanoparticles (MontMorilloniTe-MMT; titanium dioxide-TiO₂; and silica dioxide-SiO₂) were prepared via two independent procedures: mechanical mixing with subsequent direct injection molding (DIM) and mechanical mixing, followed by extrusion blending and injection molding (EIM). The contributions of nanofillers with respect to pure PET were evaluated. The incorporation of nanofillers reduces the intrinsic viscosity of the polymer matrix when processed by DIM and EIM. SAXS results showed that: MMT layers were intercalated for both processing procedures, but slightly higher for EIM; a better dispersion with smaller agglomerates size is achieved for TiO₂ and SiO₂ nanoparticles for EIM than for DIM. According to the results of DSC analysis, all fillers behave as nucleating agents for PET except SiO₂ that acts as inhibitor in case of DIM procedure. The mechanical behavior was assessed in tensile testing. The mechanical test revealed that the addition of nanoparticles have a slight influence on the elastic modulus and yield stress, but a drastic negative influence on the deformation capabilities of the moldings. The measured optical properties of the moldings gloss and haze are also strongly affected by the presence of nanoparticles. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci, 2007
Bibliography:	http://dx.doi.org/10.1002/app.26716 DESY and European Commission - No. DESY-d-II-05-101 EC ark:/67375/WNG-8PHH2MH5-B POCTI DESY FEDER istex:6B4870735518E6917582EACC32CAA2FA6784DBB6 HASYLAB project ArticleID:APP26716 ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23
ISSN:	0021-8995 1097-4628
DOI:	10.1002/app.26716