高校化学工程学报2017，Vol.31Issue(3)：641-649,9.DOI:10.3969/j.issn.1003-9015.2017.03.019
水量对水性聚氨酯聚集形态及粘接性能的影响
Effect of Water Content on the Aggregation and Adhesion Properties of Waterborne Polyurethane
罗珍 1陶灿 1韩曦曦 1鲍俊杰 1程芹 1黄毅萍 1许戈文1
作者信息
- 1. 安徽大学化学化工学院,安徽省绿色高分子重点实验室,安徽合肥 230601
- 折叠
摘要
Abstract
Waterborne polyurethane (WPUs) was prepared with poly (1,4-butanediol adipate)diol (PBA) as soft segments, and isophorone diisocyanate (IPDI), 2,2-dimethylol propionic acid (DMPA), diethylene glycol (DEG) and water as hard segments. Effects of water contents on WPUs performance were investigated. The structure and properties of WPUs were characterized by Fourier transform infrared spectroscopy (FT-IR), particle size analysis, gel permeation chromatography (GPC), differential scanning calorimetry (DSC), X-ray diffraction (XRD), thermal gravimetric analysis (TGA) and tensile tests. The results show that when water content increases, the intensity of hydrogen bonded N-H stretching vibration peaks increases and the crystallinity of WPUs decreases. Moreover, the average particle size and particle size distribution of emulsion increase, and the molecular weight and polydispersity of WPUs also increase. Meanwhile, the tensile strength, elongation at break and T-peel strength of the films increase first and then decrease. The results indicate that the tensile strength of the film reaches to a maximum value of 36.7 MPa and the maximum elongation at break is 1026.5% when the water content is 0.94%(wt). The T-peel strength of the waterborne polyurethane reaches to a maximum value of 1.9 N·cm-1 when the water content is 0.74%(wt).关键词
水性聚氨酯/脲基甲酸酯/氢键/聚集态/粘接Key words
waterborne polyurethane/allophanate/hydrogen bond/state of aggregation/adhesion分类
化学化工引用本文复制引用
罗珍,陶灿,韩曦曦,鲍俊杰,程芹,黄毅萍,许戈文..水量对水性聚氨酯聚集形态及粘接性能的影响[J].高校化学工程学报,2017,31(3):641-649,9.
