Journal
POLYMER
Volume 53, Issue 2, Pages 471-480Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.polymer.2011.12.040
Keywords
Interface; Epoxy composites; Boron nitride
Categories
Funding
- National Science Foundation of China [51107081]
- Research Fund for the Doctoral Program of Higher Education [20100073120038]
- National Undergraduate Innovative Test Program (ITP) [PP2067, PP3070]
- Shanghai Leading Academic Discipline Project [B202]
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Interface is a critical factor in determining the properties of polymer composites. Generally, the physicochemical properties of the interface are closely associated with the surface chemistry of fillers. In this study, we report a simple method to fabricate boron nitride (BN) nanoplatelets using a sonication-centrifugation technique and investigate the effects of functionalization BN nanoplatelets on thermal properties of epoxy composites. Two methods have been used for functionalizing BN nanoplatelets: non-covalent functionalization by octadecylamine (ODA) and covalent functionalization by hyperbranched aromatic polyamide (HBP). The functionalized BN nanoplatelets were characterized by Fourier-transform infrared (FT-IR), nuclear magnetic resonance (H-1 NMR), thermogravimetric analyzer (TGA), and transmission electron microscopy (TEM). Epoxy composites were fabricated by incorporating three kinds of fillers: BN nanoplatelets, BN nanoplatelets functionalized by ODA (BN-ODA), and BN nanoplatelets functionalized by HBP (BN-HBP). Our results show that the BN-HBP results in a strong interface and thus the composites exhibit significantly increased glass transition temperature, thermal decomposition temperature, thermal conductivity and dynamic thermal mechanical modulus. BN-ODA produced intermediate interface interaction, resulting in a moderate improvement of thermal properties. The composites with BN nanoplatelets show the least improvements of thermal properties. (C) 2011 Elsevier Ltd. All rights reserved.
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