期刊
MACROMOLECULAR RESEARCH
卷 19, 期 8, 页码 809-814出版社
POLYMER SOC KOREA
DOI: 10.1007/s13233-011-0801-4
关键词
graphene; nanocomposite; polyurethane; conductivity
资金
- Ministry of Education, Science and Technology (MEST) of the Korean government [2009-0093818]
- Ministry of Knowledge Economy of the Korean Government (MKE) [10033739]
- Korea Evaluation Institute of Industrial Technology (KEIT) [10033739] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [핵06B3011] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Nanocomposites of thermoplastic polyurethane (TPU), which were prepared using two types of functionalized graphene sheets (FGS) of similar thickness but different sizes were examined. The percolation threshold of the nanocomposite was reduced, evidently by increasing the particle size of the FGS. This means that the FGS with a mean particle size of 8.3 mu m had a percolation threshold at 0.39 wt% in the nanocomposite of TPU, whereas it was 1.41 wt% when the FGS size was 2.4 mu m. The FGS enhanced the modulus of TPU through a reinforcing effect but both the tensile strength and elongation at break were reduced as the FGS content was increased. These effects of FGS on the tensile properties were more evident with a larger particle size of FGS. The morphology and thermal properties of the nanocomposites were also examined.
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