PEEK变温红外光谱研究
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摘要
采用红外光谱研究了PEEK(聚醚醚酮)的分子结构。实验发现:PEEK的红外吸收模式包括C=O伸缩振动(ν_(C=O))、Ar-O-Ar平面振动(ν_(Φ-O-Φ))、Ar-CO-Ar平面振动(ν_(Φ-CO-Φ))、Ar-O-Ar不对称伸缩振动(ν_(asΦ-O-Φ))、C-H面内弯曲振动(γ_(C-H))、Ar-CO-Ar对称伸缩振动(ν_(sΦ-CO-Φ))、C-H面外弯曲振动(ω_(C-H))等。采用变温红外光谱技术进一步开展了PEEK的热稳定性的研究。实验发现:在293 K～393 K的温度范围内,PEEK的热稳定性降低。本项研究拓展了变温红外光谱技术在重要高分子纤维材料(PEEK)结构及热稳定性方面的研究范围。
The PEEK(polyetheretherketone) organic molecular structure was characterized by the infrared spectroscopy. The results showed that the infrared absorption modes of PEEK included C=O stretch vibration(ν_(C=O)), Ar-O-Ar plane vibration band(ν_(Φ-O-Φ)), Ar-CO-Ar plane vibration band(ν_(Φ-CO-Φ)), Ar-O-Ar asymmetrical stretch vibration(ν_(as)_(Φ-O-Φ)), C-H in-plane bending vibration(γ_(C-H)), Ar-CO-Ar symmetrical stretch vibration(ν_s_(Φ-CO-Φ)), C-H out-of-plane bending vibration(ω_(C-H)). The thermal stability of PEEK was studied by adopting variable temperature infrared spectroscopy. It was found that in the 293 K ～ 393 K, the thermal stability of PEEK reduced. The research field of variable temperature infrared spectroscopy in the analysis of structure and thermal stability of the important polymerfiber materials( PEEK) was expanded.
The PEEK(polyetheretherketone) organic molecular structure was characterized by the infrared spectroscopy. The results showed that the infrared absorption modes of PEEK included C=O stretch vibration(ν_(C=O)), Ar-O-Ar plane vibration band(ν_(Φ-O-Φ)), Ar-CO-Ar plane vibration band(ν_(Φ-CO-Φ)), Ar-O-Ar asymmetrical stretch vibration(ν_(as)_(Φ-O-Φ)), C-H in-plane bending vibration(γ_(C-H)), Ar-CO-Ar symmetrical stretch vibration(ν_s_(Φ-CO-Φ)), C-H out-of-plane bending vibration(ω_(C-H)). The thermal stability of PEEK was studied by adopting variable temperature infrared spectroscopy. It was found that in the 293 K ～ 393 K, the thermal stability of PEEK reduced. The research field of variable temperature infrared spectroscopy in the analysis of structure and thermal stability of the important polymerfiber materials( PEEK) was expanded.
引文
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[2] 陈乐.石墨纤维增强 PEEK[J].化工新型材料,1989(6):19-22.
[3] 张照,曹硕,朱姝,等.纺织结构碳纤维增强聚醚醚酮基复合材料的制备及界面改性[J].高分子材料科学与工程,2017,33(10):141-148.
[4] 张铄,周二鹏,甄欢,等.东北亚麻纤维变温红外光谱研究[J].纺织科学与工程学报,2018,35(3):94-98.
[5] 甄欢,周二鹏,王小萌,等.山羊绒及绵羊毛变温红外光谱研究[J].纺织科学与工程学报,2018(3):103-109.
[6] 刘子玮,姜顺子,甄欢,等.鸭绒变温红外光谱研究[J].纺织科学与工程学报,2018(2):101-104.
[7] 何静,张保国,周昌守,等.程序控温动态分析对聚醚醚酮结构特征的研究-(Ⅰ)探针分子苯对聚醚醚酮结构的研究[J].北京化工大学学报(自然科学版),1995(3):65-70.
[8] 何静,段雪,王作新.程序控温动态分析法对聚醚醚酮热稳定性的研究[J].北京化工大学学报(自然科学版),1996(4):45-48.