Effect of clay on properties of polyimide-clay nanocomposites

Autor:	Ching-Lin Liu, Hong-Wen Wang, Hsin-Yu Chang, Rui-Xuan Dong
Rok vydání:	2007
Předmět:	chemistry.chemical_classification Materials science Nanocomposite Polymers and Plastics Ionic bonding General Chemistry Polymer Dynamic mechanical analysis Dielectric Surfaces Coatings and Films chemistry Materials Chemistry Thermal stability Composite material Clay minerals Polyimide
Zdroj:	Journal of Applied Polymer Science. 104:318-324
ISSN:	1097-4628 0021-8995
Popis:	Effect of clay on mechanical, thermal, moisture absorption, and dielectric properties of polyimide-clay nanocomposites was investigated. Nanocomposites of polyimide (ODA-BSAA) hybridized with two modified clay (PK-802 and PK-805) were synthesized for comparison. The silicate layers in the polymer matrix were intercalated/exfoliated as confirmed by wide-angle X-ray diffraction and transmission electron microscopy. Thermal stability, moisture absorption, and storage modulus for these nanocomposites are improved as hybridized clay increases. Reduced dielectric constants due to the hybridization of layered silicates are observed at frequencies of 1 kHz–1 MHz and temperatures of 35–150°C. The tetrahedrally substituted smectite (PK-805) resulted in higher mechanical strength and dielectric constants than those of octahedrally substituted smectite (PK-802), which could be attributed to their stronger ionic bonding between clay layer and polymer matrix. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci 104: 318–324, 2007
Databáze:	OpenAIRE
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