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固相缩聚对聚(2,5-呋喃二甲酸乙二酯)性能的影响 被引量:1
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作者 张伟 刘绍英 +3 位作者 张淑青 李旭东 王公应 王庆印 《塑料工业》 CAS CSCD 北大核心 2022年第9期38-43,共6页
采用固相缩聚法提高聚2,5-呋喃二甲酸乙二酯(PEF)的分子量,研究了固相缩聚温度和时间对PEF的分子结构、热性能、热稳定性和力学性能的影响。通过核磁共振氢谱(~1H NMR)和红外光谱(FTIR)确认了聚合物的结构,在220℃固相缩聚制备的PEF特... 采用固相缩聚法提高聚2,5-呋喃二甲酸乙二酯(PEF)的分子量,研究了固相缩聚温度和时间对PEF的分子结构、热性能、热稳定性和力学性能的影响。通过核磁共振氢谱(~1H NMR)和红外光谱(FTIR)确认了聚合物的结构,在220℃固相缩聚制备的PEF特性黏度最高,随着固相缩聚时间的延长,可以有效提高PEF的分子量,但不改变分子结构;热性能和力学性能研究表明,延长固相缩聚时间,PEF的熔点上升,力学性能有效提高,但热稳定性未明显改善。在220℃下固相缩聚15 h的PEF-220-15的熔点、拉伸强度和断裂伸长率分别提高为239.1℃、75.64 MPa和16.4%。 展开更多
关键词 固相缩聚 聚2 5-呋喃甲酸 热性能 力学性能
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Oxidation of 2,5‐bis(hydroxymethyl)furan to 2,5‐furandicarboxylic acid catalyzed by carbon nanotube‐supported Pd catalysts 被引量:2
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作者 Zhenyu Li Liyuan Huai +5 位作者 Panpan Hao Xi Zhao Yongzhao Wang Bingsen Zhang Chunlin Chen Jian Zhang 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 2022年第3期793-801,共9页
The selective oxidation of 2,5‐bis(hydroxymethyl)furan(BHMF)in this work was proven as a promising route to produce 2,5‐furandicarboxylic acid(FDCA),an emerging bio‐based building‐block with wide application.Under... The selective oxidation of 2,5‐bis(hydroxymethyl)furan(BHMF)in this work was proven as a promising route to produce 2,5‐furandicarboxylic acid(FDCA),an emerging bio‐based building‐block with wide application.Under ambient pressure,the modified carbon nanotube‐supported Pd‐based catalysts demonstrate the maximum FDCA yield of 93.0%with a full conversion of BHMF after 60 min at 60°C,much superior to that of the traditional route using 5‐hydroxymethylfurfural(HMF)as substrates(only a yield of 35.7%).The participation of PdH_(x) active species with metallic Pd can be responsible for the encouraging performance.Meanwhile,a possible reaction pathway proceeding through 2,5‐diformylfuran(DFF)and 5‐formyl‐2‐furancarboxylic acid(FFCA)as process intermediates is suggested for BHMF route.The present work may provide new opportunities to synthesize other high value‐added oxygenates by using BHMF as an alternative feedstock. 展开更多
关键词 2 5‐Bis(hydroxymethyl)furan 2 5‐Furandicarboxylic acid Palladium hydride 5‐Hydroxymethylfurfural Catalytic oxidation
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