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Synthesis of iron-containing polysilazane and its antioxidation effect on silicone oil and rubber

机译:含铁聚硅氮烷的合成及其对硅油和橡胶的抗氧化作用

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A polysilazane containing iron (PSZI) was synthesized by the polycondensation of silazane lithium salts with FeCl3, and the structure of PSZI was characterized by IR, NMR, and elemental analyses. PSZI was used as an antioxidation additive for methylsilicone oil and rubber. The gelling time of silicone oil was increased from 3 to 1000 h at 300degreesC in air when 5 wt % of PSZI was added. The elongation at break of heat-vulcanized silicone rubber after ageing at 300degreesC for 312 h remained at 130% when 3 wt % of PSZI was added, whereas for the widely used antioxidative stabilizer Fe2O3, the elongation after ageing for 240 h was only 65%. (C) 2003 Wiley Periodicals, Inc. [References: 25]
机译:通过将硅氮烷锂盐与FeCl3缩聚合成含铁的聚硅氮烷(PSZI),并通过IR,NMR和元素分析对PSZI的结构进行了表征。 PSZI用作甲基硅油和橡胶的抗氧化添加剂。当添加5重量%的PSZI时,在空气中在300℃下硅油的胶凝时间从3小时增加到1000小时。加入3wt%的PSZI,在300℃老化312h后,热硫化硅橡胶的断裂伸长率保持在130%,而对于广泛使用的抗氧化稳定剂Fe2O3,老化240h后的伸长率仅为65% 。 (C)2003 Wiley Periodicals,Inc. [参考:25]

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