Preparation and Characterization of Urea-formaldehyde Resin/reactive Montmorillonite Composites

• Published in: Journal of Wuhan University of Technology. Materials science edition 2017-08, Vol.32 (4), p.783-790
• Main Author: 陈世伟 卢旭晨 PAN Feng WANG Tizhuang ZHANG Zhimin
• Format: Article
• Language: English
• Subjects: Advanced Materials; Aldehydes; Chemistry and Materials Science; Coupling (molecular); Coupling agents; Curing; Differential scanning calorimetry; Emissions control; Encapsulation; Energy consumption; Heat measurement; Ion exchange; Materials Science; Montmorillonite; Organic chemistry; Particle physics; Particulate composites; Polymer matrix composites; Polymerization; Scanning electron microscopy; Spectrometry; Stability analysis; Thermal stability; Thermogravimetric analysis; Urea formaldehyde resins; Water resistance; Wood products; X-ray diffraction; 制备机理; 复合材料; 差示扫描量热法; 扫描电子显微镜; 活性; 脲醛树脂; 蒙脱土; 表征
• ISSN: 1000-2413; 1993-0437
• DOI: 10.1007/s11595-017-1668-9

The urea-formaldehyde resin/reactive montmorillonite composites were prepared by in situ polymerization. The reactive montmorillonite was prepared firstly by being ion exchanged with organic molecules and secondly by being grafted with silane coupling agent, which could be demonstrated by X-ray diffraction（XRD） and thermogravimetric analysis（TGA）. Scanning electron microscopy（SEM） revealed that the morphology of the urea-formaldehyde resin/reactive montmorillonite composites were ellipsoid or columnar particles. Energy dispersive spectrometry（EDS） confirmed that the reactive montmorillonite was encapsulated by urea-formaldehyde resin. Differential scanning calorimetry（DSC） indicated that curing process of the ureaformaldehyde resin/reactive montmorillonite composites consumed more energy than pure urea-formaldehyde resin. Thermogravimetric analysis（TGA） showed that the thermal stability of the urea-formaldehyde resin/reactive montmorillonite composites improved compared to pure urea-formaldehyde resin. Furthermore, the reactive montmorillonites reduced the formaldehyde emission of the composites and increased the water resistance. Finally, the mechanism to prepare the urea-formaldehyde resin/reactive montmorillonite composites was proposed.