MDI改性硅丙复合Si-P-C-N涂层的制备及性能研究
Preparation and Properties of MDI Modified Silicon-propylene Composite Si-P-C-N Coating
呼伟 1王亚超 2马玉红 1宁占玉1
作者信息
- 1. 中复神鹰碳纤维西宁有限公司,西宁 811600
- 2. 西安建筑科技大学资源工程学院,西安 710055
- 折叠
摘要
为提高硅丙乳液(SAE)的阻燃性,以SAE为基料,三聚氰胺聚磷酸盐(MPP)和亚磷酸二乙酯(DEP)为酸源、β-环糊精(β-CD)为碳源、尿素(Urea)为气源、二苯基甲烷二异氰酸酯(MDI-100L)为协效剂,构筑MDI改性硅丙复合Si-P-C-N 涂层.利用锥形量热仪(CONE)等研究MDI-100L对复合涂层阻燃和抑烟性能的影响;使用红外光谱仪(FT-IR)等分析复合涂层的微观结构;通过热解动力学计算分析复合涂层的热性能;使用紫外线老化试验机测试复合涂层的抗老化性能.结果表明:合适质量掺量的MDI-100L(1.0％)促进在燃烧中形成阻隔热源和火源的不可燃残留物,并在燃烧中释放难燃气体,使热释放速率峰值和产烟量分别降低36.05％和23.01％.通过热解动力学分析得出,1.0％的样品使Eα在370～455 ℃从386.76 kJ/mol升高到412.39 kJ/mol,对应热稳定性增强.
Abstract
To enhance the flame retardancy of silicone-acrylic emulsion(SAE),MDI-modified silicon-acrylic composite Si-P-C-N coating.is constructed by using SAE as the base material,melamine polyphosphate(MPP)and diethyl phosphite(DEP)as acid sources,β-cyclodextrin(β-CD)as carbon source,urea as gas source,and 4,4'-diphenylmethane diisocyanate(MDI-100L)as synergist.The effect of MDI-100L on flame retardancy and smoke suppression of the composite coating is studied by cone calorimeter(CONE)and thermogravimetric infrared analyzer(TG-IR).The microstructure was analyzed by infrared spectrometer(FT-IR)and scanning electron microscope(SEM).The thermal stability was analyzed by pyrol-ysis kinetic calculation.The anti-aging performance was tested using an ultraviolet aging tester.The results show that the appropriate dosage of MDI-100L(1.0％)promotes the formation of non-combustible residues that block heat sources and firesources during combustion,and releases refractory gases during combustion,so that the peak heat release rate and smoke produc-tion are reduced by 36.05％and 23.01％,respectively.According to the pyrolysis kinetic analysis,1.0％of the sample increased the Eα from 386.76 kJ/mol to 412.39 kJ/mol at 370～455 ℃,indicating enhanced thermal stability.
关键词
硅丙乳液/三聚氰胺聚磷酸盐/β-环糊精/MDI/改性/热解动力学Key words
silicone acrylic emulsion/melamine polyphosphate/β-cyclodextrin/MDI/modification/pyrolysis kinetics引用本文复制引用
出版年
2024
NETL
NSTL
万方数据