Revisit aqueous solution properties of poly(vinyl alcohol) to obtain a deeper understanding of aqueous polymer solutions

2019 Fiscal Year Final Research Report

• Project/Area Number: 17K05881
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Polymer chemistry
• Research Institution: Kyoto University
• Principal Investigator: Daichi Ida 京都大学, 工学研究科, 准教授 (80610518)
• Co-Investigator(Kenkyū-buntansha): 吉崎 武尚 京都大学, 工学研究科, 教授 (90230705) ; 中村 洋 京都大学, 工学研究科, 教授 (90243162)
• Project Period (FY): 2017-04-01 – 2020-03-31
• Keywords: ポリビニルアルコール / 高分子水溶液 / 静的光散乱 / 分子動力学シミュレーション / 量子化学計算

Outline of Final Research Achievements

An experimental and computational study is made of dilute aqueous solution properties of poly(vinyl alcohol) (PVA). Static light scattering measurements were carried out for aqueous solutions of PVA with degree of saponification 100 and 84%. It was found that PVA with degree of saponification 100% in water behaves as a flexible polymer with large molecular weight in a good solvent in contrast to the case of PVA with degree of saponification 84% in water, which becomes somewhat stiffer than the former PVA and behaves a polymer in a poor solvent. Further, the relation between (experimental) NMR spectrum and the distribution of the rotational isometric state and hydrogen bonding is revealed by molecular dynamics simulations with a full-atom model and quantum chemical calculations,.

Free Research Field

高分子溶液学

Academic Significance and Societal Importance of the Research Achievements

本研究では，ポリビニルアルコール（PVA）の稀薄水溶液物性に対するけん化度の影響，および，水中PVAの局所形態や水素結合状態を明らかにした．得られた成果は，広範な実用的・工業的用途を持つPVAの性能向上に向けた指針を与えるのみならず，広く非イオン性高分子水溶液物性に関する基礎的知見を与えるものである．