Analysis Tool for Gas and Vapor Solubility in Glassy Polymers: The Dual Nonequilibrium Lattice Fluid (d-NELF)

IF 3.8 3区 工程技术 Q2 ENGINEERING, CHEMICAL
Matteo Minelli, Ferruccio Doghieri
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引用次数: 0

Abstract

In view of the physically sounding ideas it is founded on, as well of its simplicity and stand-alone character, the dual-mode sorption model (DMS) has been almost universally used in past decades to analyze and compare gas sorption data in polymeric matrixes below the glass transition temperature. The elements the DMS analysis is based on are here revised with the help of results developed within the nonequilibrium lattice fluid (NELF) model to derive meaningful relations between DMS model parameters and equilibrium and nonequilibrium structure property characteristics of the NELF approach. The result is a stand-alone and simple-to-use new tool for the analysis of solubility data in glassy polymers which allows for the use of a limited amount of data to retrieve the nonequilibrium structure property characteristic of the polymer matrix. The model can then be used to compare the solubility of different gases in the same glassy polymer, based just on equilibrium binary interaction parameters, or to distinguish the gas or vapor solubility properties of different nonequilibrium structures in the same polymer species, based on pertinent values of excess-free volume and compressibility.

Abstract Image

玻璃聚合物中气体和蒸汽溶解度的分析工具:双非平衡晶格流体(d-NELF)
双模吸附模型(DMS)在过去几十年中几乎被普遍用于分析和比较低于玻璃化转变温度的聚合物基质中的气体吸附数据,因为它建立在物理上听起来很合理的基础上,而且它的简单性和独立特性。本文利用非平衡晶格流体(NELF)模型的结果对DMS分析所基于的元素进行了修正,以得出DMS模型参数与NELF方法的平衡和非平衡结构特性之间有意义的关系。结果是一个独立且易于使用的新工具,用于分析玻璃状聚合物中的溶解度数据,允许使用有限数量的数据来检索聚合物基体的非平衡结构特性特征。该模型可用于比较同一玻璃聚合物中不同气体的溶解度,仅基于平衡二元相互作用参数,或区分同一聚合物中不同非平衡结构的气体或蒸汽溶解度,基于相关的过量自由体积和压缩率值。
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来源期刊
Industrial & Engineering Chemistry Research
Industrial & Engineering Chemistry Research 工程技术-工程:化工
CiteScore
7.40
自引率
7.10%
发文量
1467
审稿时长
2.8 months
期刊介绍: ndustrial & Engineering Chemistry, with variations in title and format, has been published since 1909 by the American Chemical Society. Industrial & Engineering Chemistry Research is a weekly publication that reports industrial and academic research in the broad fields of applied chemistry and chemical engineering with special focus on fundamentals, processes, and products.
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