Improvement of Properties of Polyetherimide/Liquid Crystalline Polymer Blends in the Presence of Functionalized Carbon Nanotubes

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Abstract:

This article reports the effect of functionalized multiwall carbon nanotubes (MWNT-COOH) on the morphological, dynamic mechanical, mechanical and thermal properties of polyetherimide (PEI)/liquid crystalline polymer (LCP) (Vectra A950) blends. The chemical modification of carbon nanotube enhanced the compatibility and the miscibility between PEI and LCP in the composites. Addition of functionalized MWNTs into the blend improved the thermal, mechanical and dynamic mechanical properties of the composite due to the presence of strong interfacial interaction between the polymer matrixes and the nanotubes in polymer composites. The glass transition temperature (from tan ) increased from 208 °C to 245 °C with the addition of 1.8 wt% functionalized MWNTs in the blend of PEI/LCP. The tensile strength of the composite with 1.8 wt% MWNT-COOH was enhanced by 61% and 44% as compared to PEI/LCP blend and pure PEI. The functional groups on the MWNTs surface played an important role in accelerating both the dispersion of MWNTs and the interfacial adhesion in the composites compared to raw MWNTs.

Keywords: CARBON NANOTUBE; INTERFACIAL ADHESION; LIQUID CRYSTALLINE POLYMER; MECHANICAL PROPERTY; MISCIBILITY

Document Type: Research Article

DOI: http://dx.doi.org/10.1166/jnn.2009.403

Publication date: March 1, 2009

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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