| 硅氮聚合物交联剂交联的室温硫化硅橡胶的热稳定性 |
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| 引用本文： | 王清正,师彤,谢择民,孙羡,王金亭,李光亮.硅氮聚合物交联剂交联的室温硫化硅橡胶的热稳定性[J].高分子学报,1994,0(5):573-577. |
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| 作者姓名： | 王清正 师彤 谢择民 孙羡 王金亭 李光亮 |
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| 作者单位： | 中国科学院化学研究所 |
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| 摘 要： | 利用硅氮聚合物作交联剂使双组分缩合型室温硫化硅橡胶在不需要催化剂存在下硫化，通过对硫化胶老化后的热失重、交联密度和力学性能的测定，表明这种硫化胶的耐温性能由２００℃提高到３５０℃．对硫化胶的降解动力学研究表明：降解反应活化能由７０ＫＪ／ｍｏｌ提高到３３０ＫＪ／ｍｏｌ，这是由于消除了端基引发的主链降解．
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| 关 键 词： | 硅氮聚合物交联剂，室温硫化硅橡胶，热稳定性，主链降解，KH—CL交联剂 |
| 收稿时间： | 1992-04-08 |
STUDY ON THERMAL STABILITY OF THE CONDENSATION-TYPE RTV SILICONE RUBBER VULCANIZED BY POLYSILAZANE |
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| WANG Qing-zheng,SHI Tong,XIE Ze-min,SUN Xian,WANG Jin-ting,LI Guang-liang.STUDY ON THERMAL STABILITY OF THE CONDENSATION-TYPE RTV SILICONE RUBBER VULCANIZED BY POLYSILAZANE[J].Acta Polymerica Sinica,1994,0(5):573-577. |
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| Authors: | WANG Qing-zheng SHI Tong XIE Ze-min SUN Xian WANG Jin-ting LI Guang-liang |
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| Institution: | Institute of Chemistry; Academia Sinica; Beijing 100080 |
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| Abstract: | he conventional two-component condensation -type RTV silicone rubbervulcanized by novel crosslinking agent of polysilazane was studied. The experimental results showed that RTV silicone rubber samples vulcanics by theKH--CL crosslinking agent had the resistant temperature up to 350 ℃and theactivation energy of thermal degradation reaction of the vulcanizates increased to330KJ/mol. This Aught be attributed the elimination of the degradation ofsilo-cane chain initiated by the residual catalyst and the silanol groups in thevulcanizates. |
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| Keywords: | Crosslinking agent of polysilazane Silicone rubber Thermal stability Degradation of siloxane chain KH- CL Crosslinking agent |
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