Premium
Preparation and Characterization of High‐Performance Poly(trimethylene terephthalate) Nanocomposites Reinforced with Exfoliated Graphite
Author(s) -
Li Meilu,
Jeong Young Gyu
Publication year - 2011
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.201000295
Subject(s) - materials science , nanocomposite , compounding , thermal stability , percolation threshold , composite material , graphite , electrical resistivity and conductivity , graphene , percolation (cognitive psychology) , chemical engineering , nanotechnology , electrical engineering , neuroscience , engineering , biology
To improve the physical properties of poly(trimethylene terephthalate) (PTT), a series of nanocomposites based on PTT and exfoliated graphite (EG) are prepared via melt compounding and their structures, thermal stabilities, mechanical, and electrical properties are studied. XRD and SEM show that graphene nanosheets are well dispersed in the PTT matrix without forming crystalline aggregates even at high EG content. Thermal stability and dynamic mechanical moduli of the nanocomposites are substantially improved by EG addition, and a pronounced increase in electrical volume resistivity from an insulator to almost a semiconductor is observed with increasing EG content. The electrical percolation threshold of the nanocomposites is found to be formed at the EG concentration between 3.0 and 5.0 wt.‐%.