發(fā)布時間：2018-06-21 15:37

  本文選題：真空析氣 + 綜合輻照　； 參考：《哈爾濱工業(yè)大學(xué)》2015年碩士論文

【摘要】：本文利用真空析氣、真空熱循環(huán)設(shè)備和空間輻照模擬試驗(yàn)裝置,并采取多種材料測試分析手段,考察了TR、HY、TPUY、TPU四種氣密材料的真空析氣規(guī)律和TR、TPUY、TPU三種氣密材料真空熱循環(huán)及輻照效應(yīng)。研究結(jié)果表明:HY硅橡膠的總質(zhì)量損失最大,TPUY熱塑性聚氨酯最小;TR硅橡膠的可凝揮發(fā)物含量最大,TPUY熱塑性聚氨酯最小。在真空熱循環(huán)初期,TR、TPUY、TPU三種氣密材料隨著真空熱循環(huán)次數(shù)的增加質(zhì)損率逐漸上升,質(zhì)損率上升的比較快,后期隨著循環(huán)次數(shù)的增加,質(zhì)損率上升變的平緩。三種氣密材料經(jīng)歷80次的真空熱循環(huán)后拉伸性能變化較小,拉伸強(qiáng)度變化均不超過2.0%,斷裂伸長率變化均不超過8.9%。TPUY和TPU熱塑性聚氨酯受電子和紫外綜合輻照后表面由半透明和透明狀態(tài)轉(zhuǎn)變顏色發(fā)黃,而TR硅橡膠表面顏色變化不大。高注量電子輻照后,TPUY和TPU熱塑性聚氨酯表面明顯變黃,TR硅橡膠由淡黃色變?yōu)樯铧S色。綜合輻照后三種氣密材料的拉伸性能與未輻照試樣相比,TR硅橡膠的拉伸強(qiáng)度下降了34.8%,TPUY熱塑性聚氨酯的拉伸強(qiáng)度下降了9.4%,TPU熱塑性聚氨酯的拉伸強(qiáng)度下降了33.0%。高注量電子輻照后三種氣密材料的拉伸性能與未輻照試樣相比,TPUY熱塑性聚氨酯的拉伸強(qiáng)度下降了45.9%,TPU熱塑性聚氨酯的拉伸強(qiáng)度下降了42.5%,TR硅橡膠的拉伸強(qiáng)度升高了6.9%。兩種輻照條件對三種氣密材料的斷裂伸長率影響不大。電子順磁共振分析和接觸角測試結(jié)果顯示,三種氣密材料在受到輻照影響后有新的自由基產(chǎn)生和表面接觸角變小。
[Abstract]:In this paper, vacuum gas evolution, vacuum thermal circulation equipment and space irradiation simulation test equipment are used, and various means of material testing and analysis are adopted. The vacuum gas evolution of four kinds of gas tight materials, the vacuum thermal cycling and the irradiation effect of three kinds of air tight materials are investigated. The results show that the total mass loss of the THR / TR silicone rubber is the largest and the content of the condensable volatiles of the TPUY thermoplastic polyurethane is the least than that of the TPUY thermoplastic polyurethanes. In the early stage of vacuum thermal cycle, the mass loss rate of three kinds of air tight materials increases gradually with the increase of the number of vacuum thermal cycles, and the mass loss rate increases more quickly. In the later period, the increase of mass loss rate becomes more and more gentle with the increase of cycle times. The tensile properties of the three kinds of gastight materials changed little after 80 times of vacuum thermal cycling. The tensile strength of TPUY and TPU were not more than 2.0, and the elongation at break was not more than 8.9%. TPU and TPU were changed from translucent and transparent to yellowish after electron and UV irradiation, but the color of tr silicone rubber had little change. The surface of TPUY and TPU thermoplastic polyurethane obviously changed from yellowish yellow to dark yellow after high flux electron irradiation. Compared with the unirradiated samples, the tensile strength of the three kinds of air-tight materials decreased by 34.8and 9.4. the tensile strength of TPUY thermoplastic polyurethane decreased by 33.0. The tensile strength of TPUY thermoplastic polyurethane decreased by 45.9%, and the tensile strength of TPU decreased by 42.5% after electron irradiation. The tensile strength of TPUY thermoplastic polyurethane increased by 6.9%. The two irradiation conditions have little effect on the elongation at break of three kinds of gastight materials. The results of electron paramagnetic resonance analysis and contact angle measurements show that the three kinds of gastight materials have new free radical production and surface contact angle becoming smaller after irradiation.
【學(xué)位授予單位】：哈爾濱工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TB302;TQ317.3

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本文編號：2049288