Relaxation map of PETg-montmorillonite composites: Nanofiller concentration influence on α and β relaxation processes
Samples of polyethylene‐1.4‐cyclohexylenedimethylene terephthalate glycol (PETg) with different filler contents were prepared by a master batch process. The intercalated dispersion state of montmorillonite (MMT) was characterized using X‐Ray Diffraction. Two different sample series are put in eviden...
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| Veröffentlicht in: | Polymer engineering and science 2009-05, Vol.49 (5), p.836-843 |
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| creator | Couderc, H. Saiter, A. Grenet, J. Saiter, J.M. Boiteux, G. Nikaj, E. Stevenson, I. D'Souza, N. |
| description | Samples of polyethylene‐1.4‐cyclohexylenedimethylene terephthalate glycol (PETg) with different filler contents were prepared by a master batch process. The intercalated dispersion state of montmorillonite (MMT) was characterized using X‐Ray Diffraction. Two different sample series are put in evidence with different basal distances (3.31 and 3.48 nm). The influence of nanofiller on α and β relaxations was studied by Dielectric Relaxation Spectroscopy and Differential Scanning Calorimetry. The use of these two techniques allowed us to determine accurately the fragility index m at the glass transition temperature Tg. For Tg, m, the Kauzmann temperature TK, and the relaxation time at Tg τ(Tg), we showed a decrease of the values more important for 3.48 nm basal distance than for 3.31 nm. The β did not seem affected in its apparent activation energy Ea by the MMT addition. POLYM. ENG. SCI., 2009. © 2008 Society of Plastics Engineers |
| doi_str_mv | 10.1002/pen.21249 |
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The intercalated dispersion state of montmorillonite (MMT) was characterized using X‐Ray Diffraction. Two different sample series are put in evidence with different basal distances (3.31 and 3.48 nm). The influence of nanofiller on α and β relaxations was studied by Dielectric Relaxation Spectroscopy and Differential Scanning Calorimetry. The use of these two techniques allowed us to determine accurately the fragility index m at the glass transition temperature Tg. For Tg, m, the Kauzmann temperature TK, and the relaxation time at Tg τ(Tg), we showed a decrease of the values more important for 3.48 nm basal distance than for 3.31 nm. The β did not seem affected in its apparent activation energy Ea by the MMT addition. POLYM. ENG. 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The intercalated dispersion state of montmorillonite (MMT) was characterized using X‐Ray Diffraction. Two different sample series are put in evidence with different basal distances (3.31 and 3.48 nm). The influence of nanofiller on α and β relaxations was studied by Dielectric Relaxation Spectroscopy and Differential Scanning Calorimetry. The use of these two techniques allowed us to determine accurately the fragility index m at the glass transition temperature Tg. For Tg, m, the Kauzmann temperature TK, and the relaxation time at Tg τ(Tg), we showed a decrease of the values more important for 3.48 nm basal distance than for 3.31 nm. The β did not seem affected in its apparent activation energy Ea by the MMT addition. POLYM. ENG. 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The intercalated dispersion state of montmorillonite (MMT) was characterized using X‐Ray Diffraction. Two different sample series are put in evidence with different basal distances (3.31 and 3.48 nm). The influence of nanofiller on α and β relaxations was studied by Dielectric Relaxation Spectroscopy and Differential Scanning Calorimetry. The use of these two techniques allowed us to determine accurately the fragility index m at the glass transition temperature Tg. For Tg, m, the Kauzmann temperature TK, and the relaxation time at Tg τ(Tg), we showed a decrease of the values more important for 3.48 nm basal distance than for 3.31 nm. The β did not seem affected in its apparent activation energy Ea by the MMT addition. POLYM. ENG. 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| ispartof | Polymer engineering and science, 2009-05, Vol.49 (5), p.836-843 |
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| subjects | Applied sciences Chemical Sciences Composite materials Composites Diffraction Exact sciences and technology Forms of application and semi-finished materials Montmorillonite Polybutylene terephthalate Polyethylene glycol Polymer industry, paints, wood Polymers Properties Relaxation phenomena Technology of polymers X-rays |
| title | Relaxation map of PETg-montmorillonite composites: Nanofiller concentration influence on α and β relaxation processes |
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