改性聚乙烯醇粘结剂的研究

A Study on the Denatured Polyvinyl Alcohol Binder

作者用醛基和胺基材料对聚乙烯醇进行了复合缩聚改性.用红外光谱仪和扫描电镜等手段研究了改性聚乙烯醇粘结剂的化学结构及型砂性能机制.生产应用结果表明,该粘结剂具有存放期长、劳动环境好,成本低、节省能源、型砂强度高、溃散性好等优点.

A study was conducted to denature the PVA by aldehyde and araiao materials. The Chemical structure of the denatured PVA binder and the property mechanism of the PVA-bondcd sand are studied. Using the infrared spectrum and scanning elecronmicroscope. The technological parameters of the denatured PVA binder are determined by means of the orthogonal design method. The effects of production application show that the denatured PVA binder possesses many advantages-long storage period,fine working condition, lower production cost, less energy consum-ption,great molding-sand strength and the better collapsibility.