| Preparation and Characterization of Polyborosiloxanesand Their Blends with Phenolic Resin as ShapeableCeramic Precursors简 |
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| 引用本文： | 赵京波.Preparation and Characterization of Polyborosiloxanesand Their Blends with Phenolic Resin as ShapeableCeramic Precursors简[J].高分子科学,2014,32(2):187-196. |
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| 作者姓名： | 赵京波 |
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| 摘 要： | Two polyborosiloxanes(PBSis) with char yield up to 74.13% at 800 °C were synthesized by the direct polycondensation of boric acid with phenyltrimethoxysilane in diglyme. The PBSis were characterized by gel permeation chromatography, IR spectroscopy as well as1H-,29Si- and11B-NMR. PBSi modified phenol-formaldehyde resins(PBSi/PFs) were prepared at different PBSi/PF mass ratios and were cured at 150 °C. The PBSi/PFs were characterized by IR spectroscopy, scanning electron microscopy, thermogravimetric analysis and tensile test. The results revealed that the cured PBSi/PFs had sea-island morphology and higher char yield than the common PF. PBSi/PF blend with PBSi/PF mass ratio of 0.4:1 had char yield up to 70.83% at 800 °C. The PBSi/PFs had tensile strength similar to PF. The ceramization of PBSi/PFs was also studied. The silicon boron oxycarbide(SiBOC) ceramics formed were characterized by IR spectroscopy and elemental analysis. This method provided a valuable way to prepare easily shapeable polymer blends as ceramic precursors.
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| 关 键 词： | 改性酚醛树脂 聚合物共混物 陶瓷化 前驱体 成形 表征 三甲氧基硅烷 扫描电子显微镜 |
Preparation and characterization of polyborosiloxanes and their blends with phenolic resin as shapeable ceramic precursors |
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| Hong-ying Zhao,Jing-bo Zhao,Hao Li,Tong Zhao.Preparation and characterization of polyborosiloxanes and their blends with phenolic resin as shapeable ceramic precursors[J].Chinese Journal of Polymer Science,2014,32(2):187-196. |
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| Authors: | Hong-ying Zhao Jing-bo Zhao Hao Li Tong Zhao |
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| Institution: | 1. Key Laboratory of Carbon Fiber and Functional Polymers, Ministry of Education, College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029, China
2. Laboratory of Advanced Polymer Materials, Institute of Chemistry, Chinese Academy Science, Beijing, 100190, China
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| Abstract: | Two polyborosiloxanes (PBSis) with char yield up to 74.13% at 800 °C were synthesized by the direct polycondensation of boric acid with phenyltrimethoxysilane in diglyme. The PBSis were characterized by gel permeation chromatography, IR spectroscopy as well as 1H-, 29Si- and 11B-NMR. PBSi modified phenol-formaldehyde resins (PBSi/PFs) were prepared at different PBSi/PF mass ratios and were cured at 150 °C. The PBSi/PFs were characterized by IR spectroscopy, scanning electron microscopy, thermogravimetric analysis and tensile test. The results revealed that the cured PBSi/PFs had sea-island morphology and higher char yield than the common PF. PBSi/PF blend with PBSi/PF mass ratio of 0.4:1 had char yield up to 70.83% at 800 °C. The PBSi/PFs had tensile strength similar to PF. The ceramization of PBSi/PFs was also studied. The silicon boron oxycarbide (SiBOC) ceramics formed were characterized by IR spectroscopy and elemental analysis. This method provided a valuable way to prepare easily shapeable polymer blends as ceramic precursors. |
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| Keywords: | Polyborosiloxane Phenolic resin Preparation Ceramic precursors SiBOC ceramics |
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