標題: Synthesis and characterization of novel segmented polyurethane/clay nanocomposites
作者: Chen, TK
Tien, YI
Wei, KH
材料科學與工程學系
Department of Materials Science and Engineering
關鍵字: polyurethane;silicate layers;nanocomposites
公開日期: 1-Feb-2000
摘要: A novel segmented polyurethane(Pu)/clay nanocomposite has been synthesized by polyurethane and organoclay. 12 aminolauric acid (12COOH) and benzidine (BZD) were used as swelling agents to treat Na+-montmorillonite and for forming organoclay (12COOH-mont acid BZD-mont) through ion exchange. The nanometer-scale silicate layers of organoclay were completely exfoliated in PU in the cases of 1, 3 and 5% 12COOH-mont/PU and in the cases of 1 and 3% BZD-mont/PU nanocomposites as confirmed by X-ray diffraction pattern and transmission electron microscopy studies. The segmented structures of PU were not interfered by the presence of the silicate layers in these nanocomposites as evidenced by their glass transition and degree of phase separation from differential scanning calorimetry and Fourier transform infrared measurements. A two-fold increase in the tensile strength and a three-fold increase in the elongation were found for 1% BZD-mont/PU as compared to that of pure PU. Additionally, both 1% 12COOH-mont/PU and 1% BZD-mont/PU exhibited lower water absorption properties than that of pure PU. (C) 1999 Elsevier Science Ltd. All rights reserved.
URI: http://dx.doi.org/10.1016/S0032-3861(99)00280-3
http://hdl.handle.net/11536/30755
ISSN: 0032-3861
DOI: 10.1016/S0032-3861(99)00280-3
期刊: POLYMER
Volume: 41
Issue: 4
起始頁: 1345
結束頁: 1353
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