Journal ArticleDOI
Synthesis and properties of polyimide–clay hybrid
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TLDR
A polyimide hybrid with montmorillonite clay mineral has been synthesized from a dimethylacetamide (DMAC) solution of poly(amic acid) and a DMAC dispersion of montmoroniite intercalated with an ammonium salt of dodecylamine as mentioned in this paper.Abstract:
A polyimide hybrid with montmorillonite clay mineral has been synthesized from a dimethylacetamide (DMAC) solution of poly(amic acid) and a DMAC dispersion of montmorillonite intercalated with an ammonium salt of dodecylamine. Montmorillonite consists of stacked silicate sheets about 2000 A in length, 10 A in thickness. In this hybrid, montmorillonite is dispersed homogeneously into the polyimide matrix and oriented parallel to the film surface. Thanks to this special structure, this hybrid showed excellent gas barrier properties. Only 2 wt % addition of montmorillonite brought permeability coefficients of various gases to values less than half of those of ordinary polyimide. Furthermore, this hybrid had low thermal expansion coefficient. © 1993 John Wiley & Sons, Inc.read more
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Journal ArticleDOI
Effects of compatibilizer on the layered silicate/ethylene vinyl acetate nanocomposite
TL;DR: In this paper, the dispersion behavior of monmorillonite (MMT) is investigated in EVA/MMT nanocomposite with various vinyl acetate content.
Journal ArticleDOI
Relationship between morphology and rheology of PA/PE/Clay blend nanocomposites. I. PA matrix
TL;DR: In this article, the dispersion and linear viscoelastic properties of PA/PE/Clay blend nanocomposites with and without compatibilizer (PE-g-MA) with PA as a matrix phase were studied using rheological and XRD analyses.
Journal ArticleDOI
Effect of montmorillonite content and the type of its modifier on the thermal properties and flammability of polyimideamide nanocomposite fibers
TL;DR: In this paper, the effects of montmorillonite (MMT) content (1, 3, 5%) and the type of modifiers on the thermal properties and flammability of PIA nanocomposite fibers have been assessed.
Journal ArticleDOI
Clay‐enhanced DNA separation in low‐molecular‐weight poly(N,N‐dimethylacrylamide) solution by capillary electrophoresis
TL;DR: Experimental data showed that the addition of clay increased the viscosity of the polymer solution, whereby the thin clay sheets function like a “dynamic cross‐linking plate” for the PDMA chains and effectively increase the apparent molecular mass of PDMA.
Journal ArticleDOI
Epoxy resin containing polyphenylsilsesquioxane: Preparation, morphology, and thermomechanical properties
Yong Ni,Sixun Zheng +1 more
TL;DR: In this article, nanostructured composites were obtained when a catalytic amount of aluminum triacetylacetonate was added to mediate the reaction between PPSQ and diglycidyl ether of bisphenol A (DGEBA), which significantly suppressed the phase separation on the micrometer scale.