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聚氧化丙烯多胺的合成、表征及对环氧树脂的增韧效应 被引量:27
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作者 华峰君 胡春圃 《高分子材料科学与工程》 EI CAS CSCD 北大核心 1999年第2期21-23,27,共4页
合成了一系列新型的聚氧化丙烯多胺(PPA),并对其结构进行了表征,同时研究PPA添加到双酚A环氧树脂(DGEBA)-二乙烯三胺体系中对环氧树脂固化过程的影响以及对固化环氧树脂的增韧效果。实验结果表明,随着PPA的加入... 合成了一系列新型的聚氧化丙烯多胺(PPA),并对其结构进行了表征,同时研究PPA添加到双酚A环氧树脂(DGEBA)-二乙烯三胺体系中对环氧树脂固化过程的影响以及对固化环氧树脂的增韧效果。实验结果表明,随着PPA的加入,材料的冲击强度有较大的提高,当含有10phrPPA204(聚醚分子量为400时),环氧树脂网络的冲击强度比纯环氧网络增大了2.6倍。文中同时对含有PPA的环氧树脂的固化反应进行了初步探讨。 展开更多
关键词 聚氧化丙烯多胺 环氧树脂 力学性能 增韧
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Synthesis and Characterization of EO/PO Random Copolyethers
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作者 郭建国 苑仁旭 +3 位作者 何素芹 朱诚身 焦宇 江建明 《Journal of Donghua University(English Edition)》 EI CAS 2004年第5期60-64,共5页
Ethylene oxide(EO) and propylene oxide(PO) random copolyethers were synthesized by the sequential addition of the mixture of ethylene oxide and propylene oxide to propylene glycol (initiator) in the presence of potass... Ethylene oxide(EO) and propylene oxide(PO) random copolyethers were synthesized by the sequential addition of the mixture of ethylene oxide and propylene oxide to propylene glycol (initiator) in the presence of potassium hydroxide(KOH), and characterized with infrared spectrum(FTIR) and nuclear magnetism resonance(NMR). The effects of catalyst concentration, reaction temperature, charging rate and EO/PO mixture ratio on the polymerization reaction were investigated. It was revealed that the optimal reaction condition is the ratio of 2.5∶1 000(KOH mass vs. product mass), at 114.6℃ and pressure below 0.4 MPa. The residual KOH was neutralized by phosphoric acid(H 3PO 4). Then the crude copolyether was refined with adsorbents, and the refined copolyether, which contains less than 0.7 μg/ml K+, was obtained as colorless, viscous liquid. 展开更多
关键词 ethylene oxide propylene oxide POLYETHER propylene glycol
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