Ionomer based blend as water vapor barrier material for organic device encapsulation

Seethamraju, Sindhu and Ramamurthy, Praveen C and Madras, Giridhar (2013) Ionomer based blend as water vapor barrier material for organic device encapsulation. In: ACS Applied Materials and Interfaces, 5 (10). pp. 4409-4416.

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Abstract

Blends of poly (ethylene-co-methacrylic acid) (PEMA) and poly (vinyl alcohol-co-ethylene) (EVOH) were studied for encapsulating Schottky structured organic devices. A calcium degradation test was used to determine water vapor transmission rates and to determine the moisture barrier performance of neat and blend films. Moisture barrier analysis for the neat and blend compositions was discussed concerning the interactions in the blend, diffusivity of water molecules through the unit cell systems, and the occupiable free volumes available in the unit cells using molecular dynamics simulations. The experimental results of water vapor permeation were correlated with diffusion behavior predicted from molecular dynamics simulations results. The effectiveness of the blend as a suitable barrier material in increasing the lifetime of an encapsulated Schottky structured organic device was determined.

Item Type:	Journal Article
Publication:	ACS Applied Materials and Interfaces
Publisher:	American Chemical Society
Additional Information:	Copyright of this article belongs to American Chemical Society.
Keywords:	Encapsulant; Polymer Blends; Calcium Degradation Test; Water Vapor Diffusivity; Molecular Simulation
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy) Division of Interdisciplinary Sciences > Centre for Nano Science and Engineering
Date Deposited:	11 Jul 2013 06:23
Last Modified:	11 Jul 2013 06:23
URI:	http://eprints.iisc.ac.in/id/eprint/46817

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