山梨醇改性聚乙烯醇体系的氢键作用及对水状态的影响

摘要

Two-dimensional correlation ATR-FTIR spectroscopy was used to study the hydrogen bonding and the water states during the diffusing process of water into poly( vinylalcohol) ( PVA) matrix. The effect of sor-bitol on water states was also studied by DSC analysis. The results show that the addition of sorbitol into PVA changes the hydrogen bonds in system and apparently influences the water states and water evaporation behavior by forming strong hydrogen bonding with water. Consequently, the free water in system gradually reduces and the water evaporation temperature shifts to higher values, which is beneficial to the stable thermal processing of modified PVA.%采用二维相关红外光谱研究了水渗透进入聚乙烯醇(PVA)及其改性基体过程中,体系的氢键作用及对水状态的影响；通过差示扫描量热分析( DSC)研究了改性剂山梨醇(S)对改性PVA中水状态的影响.实验结果表明,S能通过其羟基与水形成较强氢键,从而显著改变体系中水的状态及其蒸发行为,使体系自由水含量逐渐减少,水的蒸发峰温度升高.