Improvement of the oxidation resistance of silicon-containing arylacetylene resins upon the introduction of carbazoles

Wan Ling; Guo Kangkang; Zhu Junli; Wang Fan; Zhu Yaping; Deng Shifeng; Qi Huimin

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Improvement of the oxidation resistance of silicon-containing arylacetylene resins upon the introduction of carbazoles

机译：含有硅芳基乙炔树脂氧化抗性在引入咔唑上的抗氧化性

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Silicon-containing arylacetylene resins (PSAs) can be used in high temperature environment due to their excellent thermal stability. However, their high temperature oxidation is still bottle-neck for further application. Herein, Materials Genome Initiative (MGI) was utilized to identify a target monomer, 3,6-diethynylcarbazole (DEC), to design new PSAs with enhanced antioxidant properties and heat resistance. After incorporation of DEC, the thermal curing behavior observed using differential scanning calorimetry (DSC), fourier transform infrared (FTIR) and thermogravimetric analysis (TGA) revealed that obtained silicon-containing carbazolylacetylene resins (PSA-VBC) can exhibit hydroamination reaction to decrease the initial curing temperature. And the temperature at 5% weight loss (T-d5) occurred in cured copolymers ranged from 665 degrees C to 691 degrees C, which showed excellent heat resistance. Moreover, the oxidation behavior of cured resins was investigated by thermogravimetric/derivative thermogravimetry (TG/DTG), X-ray photoelectron spectroscopy (XPS) and scanning electron microscope (SEM). Upon the incorporation of DEC, the thermal oxidation decomposition temperature of PSA-VBC were 100 degrees C higher than those observed for PSAs, which also proved by XPS analysis results that the oxygen content of PSA-VBC solidified oxide was lower than that of PSAs. In addition, the surface morphology of cured PSA-VBC resins still maintained integrity after oxidation at 400 degrees C for 2 hr, which showed excellent oxidation resistance.

机译：含硅芳基乙炔树脂（PSA）具有优异的热稳定性，可用于高温环境。然而，它们的高温氧化仍然是进一步应用的瓶颈。在此，材料基因组计划（MGI）被用于确定目标单体3,6-二甲酰基咔唑（DEC），以设计具有增强抗氧化性能和耐热性的新PSA。加入DEC后，通过差示扫描量热法（DSC）、傅立叶变换红外光谱（FTIR）和热重分析（TGA）观察到的热固化行为表明，所获得的含硅咔唑基乙炔树脂（PSA-VBC）可以表现出氢胺化反应，从而降低初始固化温度。固化共聚物的5%失重温度（T-d5）在665℃到691℃之间，表现出优异的耐热性。此外，通过热重/导数热重（TG/DTG）、X射线光电子能谱（XPS）和扫描电子显微镜（SEM）研究了固化树脂的氧化行为。加入DEC后，PSA-VBC的热氧化分解温度比观察到的PSA高100℃，XPS分析结果也证明PSA-VBC固化氧化物的氧含量低于PSA。此外，在400℃下氧化2小时后，固化的PSA-VBC树脂的表面形态仍保持完整，表现出优异的抗氧化性。

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来源
《Journal of Applied Polymer Science》 |2021年第2期|共14页
作者
Wan Ling; Guo Kangkang; Zhu Junli; Wang Fan; Zhu Yaping; Deng Shifeng; Qi Huimin;
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作者单位

East China Univ Sci &

Technol Sch Mat Sci &

Engn Minist Educ Key Lab Specially Funct Polymer Mat &

Related Tec Shanghai 200237 Peoples R China;

East China Univ Sci &

Technol Sch Mat Sci &

Engn Minist Educ Key Lab Specially Funct Polymer Mat &

Related Tec Shanghai 200237 Peoples R China;

East China Univ Sci &

Technol Shanghai Key Lab Adv Polymer Mat Shanghai Peoples R China;

East China Univ Sci &

Technol Sch Mat Sci &

Engn Minist Educ Key Lab Specially Funct Polymer Mat &

Related Tec Shanghai 200237 Peoples R China;

East China Univ Sci &

Technol Sch Mat Sci &

Engn Minist Educ Key Lab Specially Funct Polymer Mat &

Related Tec Shanghai 200237 Peoples R China;

East China Univ Sci &

Technol Sch Mat Sci &

Engn Minist Educ Key Lab Specially Funct Polymer Mat &

Related Tec Shanghai 200237 Peoples R China;

East China Univ Sci &

Technol Sch Mat Sci &

Engn Minist Educ Key Lab Specially Funct Polymer Mat &

Related Tec Shanghai 200237 Peoples R China;

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原文格式 PDF
正文语种 eng
中图分类高分子化合物工业（高聚物工业）;
关键词
differential scanning calorimetry (DSC); thermal properties; thermogravimetric analysis (TGA); crosslinking; copolymers;

机译：差分扫描量热法（DSC）;热性质;热重分析（TGA）;交联;共聚物;

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Improvement of the oxidation resistance of silicon-containing arylacetylene resins upon the introduction of carbazoles

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