标题: Syntheses and properties of PI/clay hybrids
作者: Gu, AJ
Kuo, SW
Chang, FC
应用化学系
Department of Applied Chemistry
关键字: nanocomposite;polyimide/clay hybrid;coefficient of thermal expansion;dielectric property
公开日期: 7-三月-2001
摘要: A new organomontmorillonite (CM) for PI hybrids has been developed by ion-exchange reaction of cetyl pyridum chloride with Na+ montmorillonite (MMT). Polyimide/clay hybrids have been synthesized by employing two methods. Method I is by first blending a dimethylacetamide (DMAC) solution of 4,4'-oxydianiline diamine (ODA) with a DMAC dispersion of CM before adding pyromellitic dianhydride (PMDA). Method II is by blending a DMAC solution of poly(amic acid) with a DMAC dispersion of CM. Tensile, thermal, dielectric, and water-absorption properties of hybrids prepared by these two methods have been studied in detail. Results show that these properties depend on the clay type (organophilic or not), clay concentration, and the method to synthesis hybrids. The CM concentration of 3 wt% in the hybrid by Method II results in optimum properties in tensile strength, modulus, elongation, coefficient of thermal expansion (CTE), and water absorption. (C) 2001 John Wiley & Sons, Inc.
URI: http://hdl.handle.net/11536/29772
http://dx.doi.org/10.1002/1097-4628(20010307)79:10<1902
ISSN: 0021-8995
DOI: 10.1002/1097-4628(20010307)79:10<1902
期刊: JOURNAL OF APPLIED POLYMER SCIENCE
Volume: 79
Issue: 10
起始页: 1902
结束页: 1910
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