POSS改性耐紫外耐高溫型涂層材料的研究
發(fā)布時(shí)間：2019-05-22 07:11
【摘要】：近地球軌道空間是一個(gè)復(fù)雜的動(dòng)態(tài)環(huán)境中,其中紫外線輻射對(duì)近空間飛行器表面材料具有很強(qiáng)的腐蝕作用,大幅度縮短了航天器的使用壽命。因此,研究制備出耐紫外輻射的防護(hù)材料具有重要的理論和現(xiàn)實(shí)意義。近年來,POSS作為一種新型的有機(jī)／無機(jī)納米復(fù)合材料,可以改性多種聚合物以得到獨(dú)特的熱穩(wěn)定性、耐紫外性和機(jī)械性能等。本文自行制備了八(氨苯基)籠型倍半硅氧烷(OAPS)。隨后我們分別利用聚醚型、聚二甲基硅氧烷型和星型聚(脲-酰亞胺)(PUI)作為基體樹脂,OAPS作為無機(jī)前驅(qū)體,采用原位聚合的方法制備出一系列紫外防護(hù)耐高溫涂層材料。我們將材料暴露在紫外輻射光源下48小時(shí)進(jìn)行紫外輻射實(shí)驗(yàn),然后對(duì)其進(jìn)行TGA,XPS,SEM,質(zhì)量損失測(cè)試,拉伸測(cè)試等測(cè)試和表征,通過改變OAPS的含量,研究不同含量籠型倍半硅氧烷POSS和PUI結(jié)構(gòu)對(duì)材料耐熱性能、力學(xué)性能和耐紫外性能的影響。結(jié)果表明,POSS改性的星型聚(脲-酰亞胺)表現(xiàn)出優(yōu)良的耐熱分解性,初始熱分解溫度最高達(dá)到340℃。耐紫外性能最好的是POSS改性聚二甲基硅氧烷型聚(脲-酰亞胺)。POSS的加入使材料受到紫外線照射時(shí),表面迅速形成Si02陶瓷鈍化層,鈍化層能夠防止底層聚合物進(jìn)一步被腐蝕,從而有效提高復(fù)合材料的耐紫外性能。
[Abstract]:Near-Earth orbit space is a complex dynamic environment, in which ultraviolet radiation has a strong corrosion effect on the surface materials of near-space vehicles, which greatly shortens the service life of spacecraft. Therefore, it is of great theoretical and practical significance to study and prepare protective materials against ultraviolet radiation. In recent years, POSS, as a new type of organic / inorganic nanocomposites, can modify a variety of polymers to obtain unique thermal stability, UV resistance and mechanical properties. Eight (aminophenyl) cage silsesquioxane (OAPS). Was prepared by ourselves. Then, a series of UV protective high temperature resistant coatings were prepared by in situ polymerization using polyether type, polydimethyl siloxane type and star type polyurea imide) (PUI) as matrix resin and OAPS as inorganic precursor, respectively. a series of UV protective high temperature resistant coatings were prepared by in situ polymerization. We exposed the material to ultraviolet radiation source for 48 hours, then tested and characterized the mass loss of TGA,XPS,SEM, tensile test and so on. By changing the content of OAPS, The effects of different content of cage silsesquioxane POSS and PUI on the heat resistance, mechanical properties and UV resistance of the materials were studied. The results show that the star Poly (urea-imide) modified by POSS shows excellent heat-resistant decomposition, and the initial thermal decomposition temperature is up to 340 鈩，
本文編號(hào)：2482770
[Abstract]:Near-Earth orbit space is a complex dynamic environment, in which ultraviolet radiation has a strong corrosion effect on the surface materials of near-space vehicles, which greatly shortens the service life of spacecraft. Therefore, it is of great theoretical and practical significance to study and prepare protective materials against ultraviolet radiation. In recent years, POSS, as a new type of organic / inorganic nanocomposites, can modify a variety of polymers to obtain unique thermal stability, UV resistance and mechanical properties. Eight (aminophenyl) cage silsesquioxane (OAPS). Was prepared by ourselves. Then, a series of UV protective high temperature resistant coatings were prepared by in situ polymerization using polyether type, polydimethyl siloxane type and star type polyurea imide) (PUI) as matrix resin and OAPS as inorganic precursor, respectively. a series of UV protective high temperature resistant coatings were prepared by in situ polymerization. We exposed the material to ultraviolet radiation source for 48 hours, then tested and characterized the mass loss of TGA,XPS,SEM, tensile test and so on. By changing the content of OAPS, The effects of different content of cage silsesquioxane POSS and PUI on the heat resistance, mechanical properties and UV resistance of the materials were studied. The results show that the star Poly (urea-imide) modified by POSS shows excellent heat-resistant decomposition, and the initial thermal decomposition temperature is up to 340 鈩，
本文編號(hào)：2482770
本文鏈接：http://sikaile.net/kejilunwen/cailiaohuaxuelunwen/2482770.html
最近更新
教材專著
