Isothermal crystallization of poly(ethylene-co-glycidyl methacrylate)/clay nanocomposites

Poly(ethylene‐co‐glycidyl methacrylate) (PEGMA)/clay nanocomposites with clay concentrations of 1, 3, or 5 wt % were prepared via y melt blending in a twin‐screw extruder. Wide‐angle X‐ray diffraction showed that the clay layers were intercalated by PEGMA. Differential scanning calorimetry was used...

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Bibliographic Details
Published in:Journal of applied polymer science 2005-08, Vol.97 (3), p.1051-1064
Main Authors: Huang, Jiann-Wen, Kang, Chiun-Chia, Chen, Tse-Hsin
Format: Article
Language:English
Subjects:
Applied sciences
clay
Composites
crystallization
Exact sciences and technology
Forms of application and semi-finished materials
kinetics (polym.)
nanocomposites
Polymer industry, paints, wood
Technology of polymers
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Summary:Poly(ethylene‐co‐glycidyl methacrylate) (PEGMA)/clay nanocomposites with clay concentrations of 1, 3, or 5 wt % were prepared via y melt blending in a twin‐screw extruder. Wide‐angle X‐ray diffraction showed that the clay layers were intercalated by PEGMA. Differential scanning calorimetry was used to analyze the isothermal crystallization, and the equilibrium melting temperature was determined with the Hoffman–Weeks method. The Avrami, Tobin, Malkin, and Urbanovici–Segal models were applied to describe the kinetics of crystallization from the melt state under isothermal conditions. The crystallization kinetics showed that the addition of clay facilitated the crystallization of PEGMA, with the clay functioning as a heterophase nucleating agent; at higher concentrations, however, the physical hindrance of the clay layers to the motion of PEGMA chains retarded the crystallization process. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 97: 1051–1064, 2005
ISSN:0021-8995
1097-4628
1097-4682
DOI:10.1002/app.21120