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The Use of Epoxy Silanes on Montmorillonite: An Effective Way to Improve Thermal and Rheological Properties of PLAMMT Nanocomposites Obtained via “In Situ” Polymerization
Joint Authors
Sabatini, Valentina
Farina, Hermes
Basilissi, Luca
Di Silvestro, Giuseppe
Ortenzi, Marco A.
Source
Issue
Vol. 2015, Issue 2015 (31 Dec. 2015), pp.1-16, 16 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2015-07-13
Country of Publication
Egypt
No. of Pages
16
Main Subjects
Abstract EN
Polylactic acid (PLA) nanocomposites were prepared via “in situ” ring opening polymerization (ROP) of lactide using a montmorillonite, Cloisite 15A, employed after surface treatment with 3-Glycidoxypropyltrimethoxysilane.
The dispersion of the nanoparticles was checked using Wide Angle X-Ray Scattering (WAXS) and Transmission Electron Microscopy (TEM); both the effects of different amounts of montmorillonite and silane were measured on molecular weights and on thermal and rheological properties, using Size Exclusion Chromatography (SEC), Differential Scanning Calorimetry (DSC), thermogravimetric analyses (TGA), and rheological analyses.
It was found that even very low amounts (0.1% w/w) of nanoparticles greatly affect nanocomposites properties.
Unmodified montmorillonite tends to decrease molecular weights, deactivating the catalytic system used for ROP of lactide, but when epoxy silane is present molecular weights increase.
Melt crystallization temperatures increase with modified nanoparticles, which enhance crystallization process.
TGA analyses show that when pure montmorillonite is present, nanocomposites have lower thermal stability with respect to standard PLA; when silane is used thermal stability can get much higher than standard PLA as silane content increases.
The rheological behaviour of nanocomposites shows that melt viscosity is far higher than that of standard PLA at low shear rates and also a marked shear thinning behaviour can be achieved.
American Psychological Association (APA)
Sabatini, Valentina& Farina, Hermes& Basilissi, Luca& Di Silvestro, Giuseppe& Ortenzi, Marco A.. 2015. The Use of Epoxy Silanes on Montmorillonite: An Effective Way to Improve Thermal and Rheological Properties of PLAMMT Nanocomposites Obtained via “In Situ” Polymerization. Journal of Nanomaterials،Vol. 2015, no. 2015, pp.1-16.
https://search.emarefa.net/detail/BIM-1069007
Modern Language Association (MLA)
Sabatini, Valentina…[et al.]. The Use of Epoxy Silanes on Montmorillonite: An Effective Way to Improve Thermal and Rheological Properties of PLAMMT Nanocomposites Obtained via “In Situ” Polymerization. Journal of Nanomaterials No. 2015 (2015), pp.1-16.
https://search.emarefa.net/detail/BIM-1069007
American Medical Association (AMA)
Sabatini, Valentina& Farina, Hermes& Basilissi, Luca& Di Silvestro, Giuseppe& Ortenzi, Marco A.. The Use of Epoxy Silanes on Montmorillonite: An Effective Way to Improve Thermal and Rheological Properties of PLAMMT Nanocomposites Obtained via “In Situ” Polymerization. Journal of Nanomaterials. 2015. Vol. 2015, no. 2015, pp.1-16.
https://search.emarefa.net/detail/BIM-1069007
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1069007