期刊
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
卷 43, 期 12, 页码 2230-2240出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesa.2012.08.002
关键词
Nano-structures; Polymer-matrix composites (PMCs); Thermal properties; Rheological properties
资金
- National Science Council of the Republic of China (Taiwan)
Syndiotactic polystyrene (sPS)/multi-walled carbon nanotube (MWNT) nanocomposites were prepared using a melt mixing technique. SEM images demonstrated the fine dispersion of MWNTs through the sPS matrix. DSC results illustrated that the MWNTs facilitated the nucleation of sPS (up to ca. 12.2 degrees C increase), but retarded the subsequent crystals growth. Based on the Avrami analysis, the dimension of sPS crystals growth in the composites decreased because of the effects of extensive nucleation and the formation of a nanoconfined/constrained environment from the MWNTs. XRD data confirmed that the presence of MWNTs facilitated the formation of beta-form sPS crystals. The thermal stability of sPS improved to approximately 31 degrees C at 3 phr of MWNT loading. A rheological percolation threshold between an MWNT loading of 0.5 and 1 phr was determined by measuring the rheological properties of the samples. The incorporation of MWNTs reduced the electrical resistivity of sPS by 10 orders of magnitude. (c) 2012 Elsevier Ltd. All rights reserved.
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