文献类型：期刊文献

英文题名：Silicon-containing fluorenylacetylene resins with low curing temperature and high thermal stability

作者：Lu, Liewei[1];Guo, Kangkang[1,2];Zhu, Junli[3];Wang, Fan[1];Zhu, Yaping[1];Qi, Huimin[1]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Minist Educ, Key Lab Specially Funct Polymer Mat & Related Tec, Shanghai 200237, Peoples R China;[2]Shanghai Elect Tools Res Inst, Shanghai 200233, Peoples R China;[3]East China Univ Sci & Technol, Shanghai Key Lab Adv Polymer Mat, Shanghai 200237, Peoples R China

年份：2019

卷号：136

期号：48

外文期刊名：JOURNAL OF APPLIED POLYMER SCIENCE

收录：;EI(收录号：20193207267803);WOS:【SCI-EXPANDED(收录号:WOS:000477547200001)】；

基金：This work was supported by the National Natural Science Foundation of China (90816021 and 20874028) and the Fundamental Research Funds for the Central Universities (5032104918013).

语种：英文

外文关键词：curing; diethynylfluorene; materials genome initiative; resins; thermal properties

摘要：Silicon-containing arylacetylene resins (PSAs) are promising thermal stability polymers for many applications. However, the controllability of curing reaction limited their application because of the high curing temperature and enthalpy. In this study, Materials Genome Initiative was utilized to screen out a target monomer, 2,7-diethynyl-9H-fluorene (DEF), for design of new PSAs with low curing temperature and enthalpy. After incorporation of DEF, the obtained silicon-containing fluorenylacetylene resins (PSA-VBF) could be cured at a lower temperature of 149.2 degrees C with lower enthalpy (239.8 J g(-1)) than the reported PSA-V (190.0 degrees C, 368.3 J g(-1)). Moreover, the thermal curing behavior and mechanism were investigated by differential scanning calorimetry, Fourier transform infrared, and pyrolysis-gas chromatography-mass spectrometry. The results revealed that with the increased of DEF, the curing reaction of PSA-VBF became dominated by Diels-Alder reaction. And the formed aromatic fused rings endowed the cured PSA-VBF with excellent thermal stability, which were proved by thermogravimetric analysis results that the temperature at 5% weight loss (T-d5) of the cured copolymers ranged from 630 to 639 degrees C, and the char yield at 1000 degrees C was above 90%. (c) 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 48262.