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摘要
通过耐高温抗氧化、抗密闭降解体系和催化剂体系研究,制备得到一种聚酰亚胺固化成型用有机硅密封剂,并对其密封性能进行了考核验证。研制得到的有机硅密封剂耐温等级可达380℃,在350℃×24h老化后仍具备一定弹性,具备优异的耐高温抗密闭降解性能。此外,该有机硅密封剂在高达380℃的聚酰亚胺固化温度下,3MPa的压力下,能够保证热压罐成型工艺所需的密封作用,满足聚酰亚胺复合材料的批量固化成型的需求。
Abstract
Through the study on the high-temperature resistant system,anti-sealing degradation system and catalyst system,a silicon sealant for polyimide curing and molding was prepared,and the sealing property of the silicone sealant was evaluated and verified.The prepared silicone sealant exhibited a temperature resistance of up to 380℃,and still retained a certain extent of elasticity after aging at 350℃ for 24h,demonstrating excellent high-temperature resistance and anti-sealing degradation properties.Moreover,the silicone sealant could ensure the sealing effect required by hot-press can molding process at a polyimide curing temperature of up to 380℃ and a pressure of 3MPa,which met the demands of the batch preparation of polyimide composites.
关键词
耐高温
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抗密闭降解
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有机硅密封剂
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聚酰亚胺
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密封
Key words
high-temperature resistant
/
anti-sealing degradation
/
silicone sealant
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polyimide
/
sealing
聚酰亚胺固化成型密封用有机硅密封剂的研制[J].
化工新型材料, 2025, 53(1): 100-104 DOI:10.19817/j.cnki.issn1006-3536.2025.01.040
[1] 刘仪,莫松,许晓洲,等.耐高温有机/无机杂化聚酰亚胺基体树脂[J].复合材料学报,2023,40(1):62-71.
[2] 孟祥胜,柯红军,阎敬灵,等.热固性聚酰亚胺树脂研究进展[J].高分子通报,2023,36(8):1027-1041.
[3] 谢忠麟.非轮胎橡胶制品用特色弹性体Ⅲ.特殊EPDM、POE、EVM和AEM[J].橡胶工业,2008,55(9):557-566.
[4] 雷海军,翟广阳.飞机专用橡胶密封型材的研制[J].橡胶科技,2013(11):37-40.
[5] 方沅蓉,王恒芝,成晓阳,等.耐350℃绝缘有机硅密封胶的性能研究[J].航天制造技术,2007(4):24-27.
[6] 王清正,师彤,谢泽民,等.硅氮聚合物交联剂的室温硫化硅橡胶的热稳定性[J].高分子学报,1994(5):573-577.
[7] 王恒芝,张鹏,范召东.几种抗氧剂对有机硅密封剂耐热性能的影响[J].粘接,2006,27(2):5-6.
[8] Shi Y,Huang G,Liu Y,et al.Synthesis and thermal properties of novel room temperature vulcanized (RTV) silicone rubber containing POSS units in polysioxane main chains[J].Journal of Polymer Research,2013,20:1-11.
[9] 谢择民,王金亭,施增模.空间级室温硫化硅橡胶[J].弹性体,1991,1(3):16-20.
[10] 彭文庆,谢择民.高热稳定性硅橡胶的研究[J].高分子通报,2000(1):1-8.
[11] 王磊,张玥,孙全吉,等.双硫化体系耐高温硅橡胶的性能[J].航空材料学报,2022,42(5):135-141.
