| 光谱学与光谱分析 |
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| Implication of Structure for Nano Clays Used in Thermalsetting PU/PLS Composite |
| LI Zai-feng1, MA Tong1, MA Xi-liu1, Luba Kotlyar2, XU Chun-ming3 |
1. College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
2. ICPET, National Research Council, Montreal Road, Ottawa, Ontario, Canada K1A 0R6
3. The State Key Lab of Heavy Oil, University of Petroleum, Beijing 102249, China |
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Abstract Clays such as kaolinite and montmorillonite, are commonly used as an additive to modify the thermal properties of polymer. In the present work, the morphology, composition, shape and structure of montmorillonite and kaolinite were characterized and compared by various advanced techniques. The TEM/ EDX data showed that the kaolinite has a larger particle size and a lower Si/Al ratio than montmorillonite. These clays were stacked by platelets. The TGA results revealed that montmorillonite loses significant weight (around 7%) from 60 to 90 ℃ due to the dehydration of absorbed water, however, kaolinite almost doesn’t lose weight in this temperature range. Kaolinites loses its weight because of the loss of its structural OH groups at a lower temperature (around 510 ℃) than montmorillonite (670 ℃). The PAS-FTIR spectra showed that montmorillonite has a strong absorbance of hydroxyl group in hydrogen bond region at room temperature, which presents a strong ability to adsorb water on its surface. The results of varied infrared temperature and TGA showed that their structural OH group is very stable from 100 to 500 ℃, and it is possible to form thermosetting PU/PLS composite by reaction with the isocynate group of polyurethane prepolymer.
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Received: 2004-03-16
Accepted: 2004-06-26
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Corresponding Authors:
LI Zai-feng
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| Cite this article: |
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LI Zai-feng,MA Tong,MA Xi-liu, et al. Implication of Structure for Nano Clays Used in Thermalsetting PU/PLS Composite[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2005, 25(10): 1606-1609.
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| URL: |
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https://www.gpxygpfx.com/EN/Y2005/V25/I10/1606 |
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