Journal
MACROMOLECULAR MATERIALS AND ENGINEERING
Volume 296, Issue 2, Pages 159-167Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/mame.201000295
Keywords
exfoliated graphite; nanocomposites; mechanical properties; poly(trimethylene terephthalate); thermal properties
Funding
- Ministry of Education, Science and Technology [2010-0011176]
- National Research Foundation of Korea [2010-0011176] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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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.-%.
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