摘要
研究基膏与硫化膏的配比、促进剂二苯胍对聚硫密封胶的固化时间和力学性能的影响。结果发现,基膏与硫化膏的配比为100/12时,密封胶能完全固化;基膏与硫化膏的配比为100/8时,密封胶具有最佳的力学性能,断裂伸长率和拉伸强度分别为437%和2.65 MPa;添加二苯胍能促进密封胶的固化过程;100℃热老化7 d会降低聚硫密封胶的硬度,并提高其拉伸强度和断裂伸长率。
The effects of the ratio of main agent/curing agents and accelerator diphenyl guanidine on the curing time and mechanical properties of polysulfide have been studied. The results show that polysulfide can completely cured as the ratio of main agent/curing agents is 100/12. And polysulfide presents best mechanical properties when the ratio of main agent/curing a- gents is 100/8,and the tensile strength and elongation at break is 2.65 MPa and 437%,respectively. The addition of diphenyl guanidine can accelerate the curing process. Besides,the hardness of polysulfide is depressed, while the tensile strength and elongation at break are increasedwhen heated on 100℃ after 7 days.
出处
《新型建筑材料》
北大核心
2011年第7期69-72,共4页
New Building Materials
基金
十一五”国家科技支撑计划项目(2009BAG12A07)
关键词
聚硫密封胶
基膏
硫化膏
固化时间
力学性能
热老化
polysulfide sealant： base agent
curing agent
curing time： mechanical properties： thermal aging
