摘要
以硅烷改性聚醚(MS)预聚物为基料制备了一种高强度MS密封胶。分别研究了不同分子结构的预聚物、炭黑及除水剂的添加量和低温环境对MS密封胶的拉伸强度、剪切强度、断裂伸长率及贮存稳定性的影响。结果发现,不同分子结构的预聚物对MS密封胶的柔韧性、模量和强度有较大的影响;表面改性纳米碳酸钙配合质量分数为6%的炭黑作为补强填料可以得到性能优异的MS密封胶,其拉伸强度在4 MPa以上,剪切强度可达3 MPa,低温剪切强度稍有衰减;同时,加入1%的除水剂可以有效地提高MS密封胶的贮存稳定性。
A silane modified polyether sealant with high strength was successfully synthesized by using the silane modified polyether（MS） prepolymer as the matrix polymer. The effects of prepolymers with different molecular structure contents of carbon black and water absorbent and low temperature environment on the tensile strength, shear strength, elongation at break and storage stability of the MS sealant were investigated, respectively. It was found that the different molecular structure of prepolymers has a greater effect on the flexibility, modulus and strength of the MS sealant. Surface modified nano calcium carbonate combined with 6 wt% of carbon black as a reinforcing filler can get excellent performance of MS sealants, its tensile strength is over 4 MPa, shear strength can reach 3 MPa, but its shear strength at low temperature decreases slightly. Meanwhile, adding 1% of the water absorbent can effectively improve the storage stability of MS sealants.
出处
《粘接》
CAS
2016年第8期43-45,38,共4页
Adhesion
关键词
高强度
硅烷改性聚醚密封胶
环保
high strength
silane modified polyether sealant
environmentally friendly
