| 乙酸乙酯在D3F阴离子开环聚合中的促进作用 |
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| 引用本文： | 杨鹏,高亚娟,管涌,郑安呐. 乙酸乙酯在D3F阴离子开环聚合中的促进作用[J]. 高等学校化学学报, 2011, 32(6): 1431-1435 |
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| 作者姓名： | 杨鹏 高亚娟 管涌 郑安呐 |
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| 作者单位： | 华东理工大学材料科学与工程学院,上海先进聚合物材料重点实验室,超细材料制备与应用教育部重点实验室,上海,200237 |
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| 基金项目： | 国家自然科学基金，上海市重点学科建设项目 |
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| 摘 要： | 以硅醇钠为引发剂,乙酸乙酯(EA)为极性调节剂,在HAAKE转矩流变仪中合成了聚三氟丙基甲基硅氧烷(PMTFPS),探讨了三氟丙基甲基环三硅氧烷(D3F)聚合过程中EA的促进作用.结果表明,在120℃下,引发剂质量分数为2.74%,EA极性凋节剂浓度为0.30 mol/L,反应4 min时,PMTFPS的数均分子量((...
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| 关 键 词： | 氟硅聚合物 乙酸乙酯 阴离子开环聚合 转矩流变仪 |
| 收稿时间： | 2010-06-17 |
Promoting Effect of Ethyl Acetate on Anionic Ring-opening Polymerization of 1, 3,5-Trimethyl-1, 3,5-tris(3,3,3-trifluoropropyl) cyclotrisiloxane(D3 F) |
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| YANG Peng,GAO Ya-Juan,GUAN Yong,ZHENG An-Na. Promoting Effect of Ethyl Acetate on Anionic Ring-opening Polymerization of 1, 3,5-Trimethyl-1, 3,5-tris(3,3,3-trifluoropropyl) cyclotrisiloxane(D3 F)[J]. Chemical Research In Chinese Universities, 2011, 32(6): 1431-1435 |
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| Authors: | YANG Peng GAO Ya-Juan GUAN Yong ZHENG An-Na |
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| Affiliation: | Shanghai Key Laboratory of Advanced Polymeric Materials, Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China |
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| Abstract: | Poly[methyl(trifluoropropyl)siloxane](PMTFPS) was prepared in the mixing chamber of a HAAKE torque rheometer using sodium silanolate as the initiator, and ethyl acetate(EA) as the promoter. The promoting effect of EA in the anionic bulk polymerization of D3F was investigated. The results show that the maximum of number average molecular weight(Mn=2.45×105) of PMTFPS was obtained with high yield(89.2%) when the polymerization was carried out in the presence of 2.74%initiator and 0.30 mol/L EA at 120 ℃ for 4.0 min. The backbiting reactions were almost suppressed and 0.74% cyclic by-products were obtained by matrix-assisted laser desorption ionization time-of-flight mass spectrometry(MALDI-TOF-MS) for EA promoter system. Investigations of differential scanning calorimetry(DSC) and thermogravimetic analysis(TGA) show that PMTFPS can be used in a wide range of operational temperatures. |
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| Keywords: | Poly[methyl(trifluoropropyl)siloxane] Ethyl acetate Anionic ring-opening polymerization Torque rheometer |
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