文献类型：期刊文献

英文题名：Effects of temperature and solvent composition on the intrinsic viscosity of polyvinyl butyral in ethanol/water solutions

作者：Luan, Wenwen[1];Wang, Chunyu[1];Zeng, Zuoxiang[1];Xue, Weilan[1];Liang, Fei[1];Bai, Yu[2]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, Shanghai 200237, Peoples R China;[2]Sinopec Shanghai Res Inst Petrochem Technol, Shanghai 201208, Peoples R China

年份：2021

卷号：336

外文期刊名：JOURNAL OF MOLECULAR LIQUIDS

收录：;EI(收录号：20212810635977);WOS:【SCI-EXPANDED(收录号:WOS:000715598500011)】；

基金：We gratefully acknowledge financial support from Sinopec Shanghai Research Institute of Petrochemical Technology (420094).

语种：英文

外文关键词：Polymer solution; Polyvinyl butyral; Intrinsic viscosity; Expansion factor

摘要：In this work, the samples of polyvinyl butyral (PVB) with an average degree of acetalization of 79.56% and the average molecular weight of 68.696 kg.mol(-1) were prepared by polyvinyl alcohol (PVA) and nbutyraldehyde, catalyzed by p-Toluenesulfonic acid (PTSA). The intrinsic viscosities of PVB were measured in ethanol/water solutions in the temperature range of 293.15-313.15 K. The expansion factors of PVB molecular chains were calculated with the intrinsic viscosity data. The related thermodynamic parameters were derived from the temperature dependence of expansion factors and results indicate that the quality of mixed ethanol/water solvents for PVB solutions decreases with the increase of temperature and the volume fractions of water. (C) 2021 Elsevier B.V. All rights reserved.