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Dynamic Mechanical and Thermal Properties of Phenylethynyl‐Terminated Polyimide Composites Reinforced With Expanded Graphite Nanoplatelets
Author(s) -
Cho Donghwan,
Lee Sangyeob,
Yang Gyeongmo,
Fukushima Hiroyuki,
Drzal Lawrence T.
Publication year - 2005
Publication title -
macromolecular materials and engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.913
H-Index - 96
eISSN - 1439-2054
pISSN - 1438-7492
DOI - 10.1002/mame.200400281
Subject(s) - materials science , composite material , polyimide , thermosetting polymer , exfoliation joint , graphite , glass transition , dynamic mechanical analysis , intercalation (chemistry) , thermal expansion , particle size , thermal , particle (ecology) , modulus , exfoliated graphite nano platelets , graphene , polymer , chemical engineering , nanotechnology , inorganic chemistry , chemistry , physics , oceanography , layer (electronics) , geology , meteorology , engineering
Abstract Summary: This article reports on the dynamic mechanical and thermal properties of thermosetting phenylethynyl‐terminated polyimide (PETI‐5) composites reinforced with expanded graphite (EG) nanoplatelets having various average particle sizes and content. The EG nanoplatelets with varying particle sizes were prepared by different pulverization techniques through intercalation and exfoliation of natural graphite flakes. The effect of the EG particle size and concentration of the thermal behavior of PETI‐5/EG composites was investigated with several thermal analysis methods (DMA, TMA, and DSC). The storage modulus dynamic mechanical properties and glass transition temperature significantly increased with increasing concentration of EG nanoreinforcements regardless of size. The coefficient of thermal expansion significantly decreased, especially in the glass transition region.