聚乙二醇对硅酸盐胶黏剂适用期与性能的影响
Effect of Polyethylene Glycol on Pot Life and Performances of Silicate Adhesives
沈镇强 1王玉丹 2曹先启 3宋来明 3薛金龙 3王超3
作者信息
- 1. 哈尔滨工程大学材料科学与化学工程学院,哈尔滨 150000;黑龙江省科学院石油化学研究院,哈尔滨 150000
- 2. 哈尔滨工程大学材料科学与化学工程学院,哈尔滨 150000
- 3. 黑龙江省科学院石油化学研究院,哈尔滨 150000
- 折叠
摘要
为解决硅酸盐胶黏剂在空气中裸露时表面固化成膜导致的适用期过短问题,向硅酸盐胶黏剂中加入聚乙二醇(PEG)进行改性,使用流变仪、扫描电子显微镜、红外光谱仪、热重红外质谱联用仪和万能拉力机系统研究了胶黏剂的适用期、流变性能、微观形貌、分子结构、热稳定性及粘接性能.结果表明:当硅酸盐胶黏剂中PEG掺量为6％(质量分数)时,适用期延长至50 min;PEG在胶黏剂内部分布均匀,显著改变了胶黏剂的致密性与触变性;由Arrhenius方程计算出的预固化活化能由8.47 kJ/mol提高至12.61 kJ/mol;PEG不影响体系粘接性能,对同类型硅酸盐胶黏剂适用期也具有良好的延长效果.
Abstract
In order to solve the problem of short pot life to surface curing of silicate adhesives into film when exposed in air,the adhesives were modified by adding polyethylene glycol(PEG)to silicate adhesives,and the pot life,rheological performance,microscopic morphology,molecular structure,thermal stability and adhesive performance were systematically studied by using rheometer,scanning electron microscope,infrared spectrometer,thermogravimetric infrared mass spectrometer and universal tensile machine.The results show that when the PEG dosage in silicate adhesives is 6％(mass fraction),the pot life is extended to 50 min.The PEG is uniformly distributed inside adhesive,which significantly enhances the densification and thixotropy.The pre-curing activation energy calculated by Arrhenius equation increases from 8.47 kJ/mol to 12.61 kJ/mol.PEG does not affect the bonding performance of system and has a good extension effect on the pot life of same types of silicate adhesives.
关键词
硅酸盐胶黏剂/聚乙二醇/适用期/流变性能/粘接性能Key words
silicate adhesive/polyethylene glycol/pot life/rheological performance/bonding performance引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
维普
万方数据