紫外辐照影响硅橡胶出气污染模型及效应研究
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摘要
基于有机材料出气污染过程分析,并结合辐射化学有关理论,建立材料在紫外辐照后的分子污染模型;在ASTM E1559标准测试方法的基础上,以硅橡胶材料为污染源开展试验,测试其经过不同紫外辐照时间后的出气污染沉积量,并对辐照后材料表面的微观特性进行测试分析。根据沉积量测试结果对模型待定参数进行拟合,并结合微观测试结果,分析得到紫外辐照导致硅橡胶分子链中Si-O键以及Si-C键断裂,且部分小分子物质提前挥发,从而使得出气成分中小分子污染物含量下降,大分子污染物含量上升,并最终导致总污染量在前期有所下降,在后期显著增加。
The model of the mass loss and contamination of materials after UV radiation is established through the analysis of the outgassing and radiation chemical theory. The ground experiment is implemented based on the ASTM E1559 standard, using silicone rubber material as the contamination source material. The deposited contamination mass led by the outgassing and the surface characters of the material after UV radiation are measured. The mechanism of the UV radiation influence on the silicone rubber is analyzed based on the measured results, it is obtained that the Si-O and Si-C bond of the macromolecular chain is fractured and part of the small molecular substances are escaped, which leads to the increase of the big molecular substances and the reduction of the small molecular substances, resulting in the decline in the earlier stage and the rising in the later stage of the total contamination mass.
The model of the mass loss and contamination of materials after UV radiation is established through the analysis of the outgassing and radiation chemical theory. The ground experiment is implemented based on the ASTM E1559 standard, using silicone rubber material as the contamination source material. The deposited contamination mass led by the outgassing and the surface characters of the material after UV radiation are measured. The mechanism of the UV radiation influence on the silicone rubber is analyzed based on the measured results, it is obtained that the Si-O and Si-C bond of the macromolecular chain is fractured and part of the small molecular substances are escaped, which leads to the increase of the big molecular substances and the reduction of the small molecular substances, resulting in the decline in the earlier stage and the rising in the later stage of the total contamination mass.
引文
[1] 沈自才.空间辐射环境工程[M].北京:中国宇航出版社,2013.
[2] 徐坚,杨斌,杨猛,等.空间紫外辐照对高分子材料破坏机理研究综述[J].航天器环境工程,2011:28(1):25-30.[Xu Jian,Yang Bin,Yang Meng,et al.Mechanism of polymer property degradation in space UV radiation environment[J].Space Environment Engineering,2011:28(1):25-30.]
[3] Hanks C L,Hamman D J.Radiation effects design handbook:Section 3 electrical insulating materials and capacitors [R].NASA CR-l 787.Radiation Effects Information Center,Battelle Memorial Institute,July 1971.
[4] Grossman E,Noter Y,Lifshitz Y.Oxygen and VUV irradiation of polymers-atomic force microscopy(AFM) and complementary studies[C].The 7th International Symposium on Materials in Space Environment,Toulouse,France,Jun 16-20,1997.
[5] Edwards D L,Hubbs W,Stanaland T,et al.Characterization of space environmental effects on candidate solar sail material[C].International Symposium on Optical Science and Technology,Seattle,USA,Nov 11-14,2002.
[6] Dever J A,Banks B A,Yan L.Effects of vacuum ultraviolet radiation on DC93-500 silicone[J].Journal of Spacecraft and Rockets,2006,43(2):386-392.
[7] Boeder P,Mikatarian R,Lorenz M J,et al.Simulated effects of space environment exposure on the blocking force of silicone adhesive[C].The 43rd AIAA Aerospace Sciences Meeting and Exhibit,Reno,USA,Jan 10-13,2006.
[8] 姜利祥,刘振琦,陈平,等.真空紫外辐射的模拟及其对聚合物材料的影响[J].应用激光,2002,22(1):23-26.[Jiang Li-xiang,Liu Zhen-qi,Chen Ping,et.al.Effect of vacuum ultraviolet on polymer materials properties and its simulator[J].Applied Laser,2002,22(1):23-26.]
[9] 张蕾,严川伟,陈荣敏,等.真空紫外辐射对空间有机防护涂层的降解研究[J].中国空间科学技术,2007,27(1):33-40.[Zhang Lei,Yan Chuan-wei,Chen Rong-min,et al.Ground-based investigations of vacuum ultraviolet radiation behaviors of organic protective coatings[J].Chinese Space Science and Technology,2007,27(1):33-40.]
[10] 王毅,王先荣,郭兴,等.真空紫外辐照对聚酰亚胺结构与性能的影响[J].航天器环境工程,2015,32(6):634-637.[Wang Yi,Wang Xian-rong,Guo Xing,et al.Influence of vacuum ultraviolet irradiation on structure and properties of polymide materials[J].Space Environment Engineering,2015,32(6):634-637.]
[11] 沈自才,牟永强,白羽,等.紫外辐射环境下均苯型聚酰亚胺薄膜力学性能研究[J].真空与低温,2015,21(5):260-264.[Shen Zi-cai,Mu Yong-qiang,Bai Yu,et al.Study on the mechanical property of poly-romellitimide film by UV radiation[J].Vacuum and Cryogenics,2015,21(5):260-264.]
[12] Khassanchine R H,Grigorevskiy A V,Galygin A N.Simulation of outgassing processes in spacecraft coatings induced by the vacuum influence[J].Journal of Spacecraft and Rockets,2004,41(3):384-388.
[13] Khassanchine R H,Timofeev A N,Grigorevskiy A V,et al.Influence of UV radiation on outgassing of polymeric composites[J].Journal of Spacecraft and Rockets,2006,43(2):410-413.
[14] 王毅,郭兴,王先荣,等.真空紫外辐照引起的聚合物材料质量损失模型及实验验证[J].宇航学报,2016,37(2):229-234.[Wang Yi,Guo Xing,Wang Xian-rong,et al.Simulation and experimental validation of model of mass loss of polymer material induced by vacuum ultraviolet radiation[J].Journal of Astronautics,2016,37(2):229-234.]
[15] 王先荣.空间材料质损过程的数学分析与理论的实验验证[J].中国空间科学技术,1989,9(3):8-20.[Wang Xian-rong.Mathematical analyses and experimental verification on spacecraft materials mass loss process[J].Chinese Space Science and Technology,1989,9(3):8-20.]
[2] 徐坚,杨斌,杨猛,等.空间紫外辐照对高分子材料破坏机理研究综述[J].航天器环境工程,2011:28(1):25-30.[Xu Jian,Yang Bin,Yang Meng,et al.Mechanism of polymer property degradation in space UV radiation environment[J].Space Environment Engineering,2011:28(1):25-30.]
[3] Hanks C L,Hamman D J.Radiation effects design handbook:Section 3 electrical insulating materials and capacitors [R].NASA CR-l 787.Radiation Effects Information Center,Battelle Memorial Institute,July 1971.
[4] Grossman E,Noter Y,Lifshitz Y.Oxygen and VUV irradiation of polymers-atomic force microscopy(AFM) and complementary studies[C].The 7th International Symposium on Materials in Space Environment,Toulouse,France,Jun 16-20,1997.
[5] Edwards D L,Hubbs W,Stanaland T,et al.Characterization of space environmental effects on candidate solar sail material[C].International Symposium on Optical Science and Technology,Seattle,USA,Nov 11-14,2002.
[6] Dever J A,Banks B A,Yan L.Effects of vacuum ultraviolet radiation on DC93-500 silicone[J].Journal of Spacecraft and Rockets,2006,43(2):386-392.
[7] Boeder P,Mikatarian R,Lorenz M J,et al.Simulated effects of space environment exposure on the blocking force of silicone adhesive[C].The 43rd AIAA Aerospace Sciences Meeting and Exhibit,Reno,USA,Jan 10-13,2006.
[8] 姜利祥,刘振琦,陈平,等.真空紫外辐射的模拟及其对聚合物材料的影响[J].应用激光,2002,22(1):23-26.[Jiang Li-xiang,Liu Zhen-qi,Chen Ping,et.al.Effect of vacuum ultraviolet on polymer materials properties and its simulator[J].Applied Laser,2002,22(1):23-26.]
[9] 张蕾,严川伟,陈荣敏,等.真空紫外辐射对空间有机防护涂层的降解研究[J].中国空间科学技术,2007,27(1):33-40.[Zhang Lei,Yan Chuan-wei,Chen Rong-min,et al.Ground-based investigations of vacuum ultraviolet radiation behaviors of organic protective coatings[J].Chinese Space Science and Technology,2007,27(1):33-40.]
[10] 王毅,王先荣,郭兴,等.真空紫外辐照对聚酰亚胺结构与性能的影响[J].航天器环境工程,2015,32(6):634-637.[Wang Yi,Wang Xian-rong,Guo Xing,et al.Influence of vacuum ultraviolet irradiation on structure and properties of polymide materials[J].Space Environment Engineering,2015,32(6):634-637.]
[11] 沈自才,牟永强,白羽,等.紫外辐射环境下均苯型聚酰亚胺薄膜力学性能研究[J].真空与低温,2015,21(5):260-264.[Shen Zi-cai,Mu Yong-qiang,Bai Yu,et al.Study on the mechanical property of poly-romellitimide film by UV radiation[J].Vacuum and Cryogenics,2015,21(5):260-264.]
[12] Khassanchine R H,Grigorevskiy A V,Galygin A N.Simulation of outgassing processes in spacecraft coatings induced by the vacuum influence[J].Journal of Spacecraft and Rockets,2004,41(3):384-388.
[13] Khassanchine R H,Timofeev A N,Grigorevskiy A V,et al.Influence of UV radiation on outgassing of polymeric composites[J].Journal of Spacecraft and Rockets,2006,43(2):410-413.
[14] 王毅,郭兴,王先荣,等.真空紫外辐照引起的聚合物材料质量损失模型及实验验证[J].宇航学报,2016,37(2):229-234.[Wang Yi,Guo Xing,Wang Xian-rong,et al.Simulation and experimental validation of model of mass loss of polymer material induced by vacuum ultraviolet radiation[J].Journal of Astronautics,2016,37(2):229-234.]
[15] 王先荣.空间材料质损过程的数学分析与理论的实验验证[J].中国空间科学技术,1989,9(3):8-20.[Wang Xian-rong.Mathematical analyses and experimental verification on spacecraft materials mass loss process[J].Chinese Space Science and Technology,1989,9(3):8-20.]