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Polyhedral oligomeric silsesquioxane (POSS)-modified phenolic resin: Synthesis and anti-oxidation properties
e-Polymers ( IF 3.2 ) Pub Date : 2021-01-01 , DOI: 10.1515/epoly-2021-0031
Bing Wang 1 , Minxian Shi 1 , Jie Ding 1 , Zhixiong Huang 1
Affiliation  

In this work, octamercapto polyhedral oligomeric silsesquioxane (POSS-8SH) and octaphenol polyhedral oligomeric silsesquioxane (POSS-8Phenol) were successfully synthetized. POSS-8Phenol was added into the synthesis process of liquid thermoset phenolic resin (PR) to obtain POSS-modified phenolic resin (POSS-PR). Chemical structures of POSS-8SH, POSS-8Phenol, and POSS-PR were confirmed by FTIR and 1 H-NMR. TG and DTG analysis under different atmosphere showed that char yield of POSS-PR at 1,000°C increased from 58.6% to 65.2% in N 2 , which in air increased from 2.3% to 26.9% at 700°C. The maximum pyrolysis temperature in air increased from 543°C to 680°C, which meant better anti-oxidation properties. XRD results confirmed both POSS-8Phenol and POSS-PR-generated crystalline SiO 2 in air, which could explain the improvement of anti-oxidation properties. SEM showed that the POSS-PR had phase separation during curing process. Finally, carbon fiber fabric-reinforced POSS-PR (C-POSS-PR) was prepared to verify the anti-oxidation properties of POSS-PR.

中文翻译:

多面体低聚倍半硅氧烷(POSS)改性的酚醛树脂:合成和抗氧化性能

在这项工作中,成功地合成了八巯基多面体低聚倍半硅氧烷(POSS-8SH)和八酚多面体低聚倍半硅氧烷(POSS-8Phenol)。将POSS-8苯酚加入到液体热固性酚醛树脂(PR)的合成过程中,以获得POSS改性的酚醛树脂(POSS-PR)。通过FTIR和1 H-NMR确认了POSS-8SH,POSS-8苯酚和POSS-PR的化学结构。TG和DTG在不同气氛下的分析表明,在1000℃下,POSS-PR在N 2中的焦炭产率从58.6%增加到65.2%,而在700℃下,空气中的焦炭产率从2.3%增加到26.9%。空气中的最高热解温度从543°C增加到680°C,这意味着更好的抗氧化性能。XRD结果证实了POSS-8Phenol和POSS-PR在空气中生成的结晶SiO 2,这可以解释抗氧化性能的改善。SEM显示,POSS-PR在固化过程中具有相分离。最后,制备了碳纤维增强的POSS-PR(C-POSS-PR),以验证POSS-PR的抗氧化性能。
更新日期:2021-01-01
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