乙烯醇
材料科学
热稳定性
极限抗拉强度
化学工程
结晶度
高分子化学
聚合物
傅里叶变换红外光谱
聚合物混合物
氢键
复合材料
有机化学
化学
分子
工程类
共聚物
作者
Changfa Xiao,Hongjuan Liu,Shanjun Gao,Lina Zhang
摘要
Abstract This article deals with the characterization of blend films obtained by mixing poly(vinyl alcohol) (PVA) and konjac glucomannan (KGM) in aqueous solution. The DTA curves of PVA/KGM blend films showed overlapping of the main thermal transitions characteristic of the individual polymers. The exothermic peak at 312°C, which resulted from the thermal degradation of the KGM, shifted slightly to a higher temperature at low PVA content (≤20 wt%). The weight-retention properties of the blend films indicated that thermal stability of the blend films were better than pure KGM film at PVA content below 20 wt%. The crystallinities, tensile strength, and elongation at break of the films increased with the PVA content, and reached the maximum values at 20 wt% PVA, then decreased. Changes in the carbonyl stretching band of KGM and hydroxyl stretching regions of KGM and PVA were detected by FTIR analysis. Those are attributable to the existence of a certain degree of inteaction between KGM and PVA, and resulted from intermolecular hydrogen bonds. Phase separation phenomena were observed by examining the surface of the blend films by SEM. Keywords: Poly(vinyl alcohol)Konjac GlucomannanBlend FilmsPhysical PropertiesThermal Stability Acknowledgments
科研通智能强力驱动
Strongly Powered by AbleSci AI