Understanding the Effect of Water Absorption on the Microstructure, Molecular Kinematics, and Relaxation Behavior of Polyvinyl Butyral Films

IF 3.8 3区工程技术 Q2 ENGINEERING, CHEMICAL

Industrial & Engineering Chemistry Research Pub Date : 2024-11-30 DOI:10.1021/acs.iecr.4c03319

Huihui Wang, Li Sun, Zhen Liu, Zuoxiang Zeng

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Abstract

The effects of water molecules on the chemical structure, microstructure, molecular kinematics, and relaxation behavior of polyvinyl butyral (PVB) films were investigated. The 2D ATR-FTIR results demonstrated that water molecules initially interacted with free O–H and C═O, subsequently with hydrogen-bonded O–H and C═O between the hard and soft segments, and ultimately with hydrogen-bonded O–H and C═O in the hard segments. The SEM, AFM, DSC, and SAXS-WAXS results indicated that the microphase separation structure of PVB was formed by soft and hard domains, and the entry of water molecules disrupted the original structural regularity of the hard segments of the PVB films, resulting in a decrease in microphase separation degree. The BDRS results showed that water absorption had a significant effect on the molecular kinematics of the soft segments and the hard–soft interface. The results of the stress relaxation behavior showed that the relaxation properties of PVB films deteriorated after water absorption.

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来源期刊

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.