降冰片烯基悬垂芳香(co)聚醚醚酮

IF 2.1 3区 化学 Q3 POLYMER SCIENCE
Aniket A. Talanikar, Samadhan S. Nagane, Prakash P. Wadgaonkar, Gajanan S. Rashinkar
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引用次数: 0

摘要

摘要以4,4′-(双环(2.2.1)庚-5-烯-2基亚甲基)双(2-甲氧基酚)(BPA-NB)为阶梯生长单体,采用亲核芳香取代缩聚法合成(co)聚醚醚酮(peek - nb)。以4,4′-二氟苯甲酮为原料,分别与BPA-NB、BPA-NB和双酚A的不同组分缩聚合成了1个homo和5个peek - nb。1H核磁共振谱证实了peek - nb的化学结构和组成。PEEK-NBs的固有粘度和数均分子量分别在0.64 ~ 0.78 dL g−1和62,670 ~ 84,470 g mol−1之间,表明形成了相当高的分子量聚合物。peek - nb在氯仿、二氯甲烷、四氢呋喃等常见有机溶剂中易于溶解。从氯仿溶液中可以铸出坚韧、透明、柔韧的PEEK-NBs薄膜。x射线衍射研究表明peek - nb具有无定形性质。通过DSC分析,peek - nb的玻璃化转变温度(Tg)值在163 ~ 190℃之间,Tg值随着BPA-NB摩尔百分比的增加而升高。用4-(叠氮多甲基)-7-甲氧基- 2h - chromen2 - 1和9-(叠氮多甲基)蒽两种叠氮化合物,通过无金属叠氮烯1,3-偶极环加成反应,对具有代表性的PEEK-NB进行聚合后改性,得到分别附有香豆素基和蒽基的共聚物(醚醚酮)s。关键词:(Co)聚醚醚酮鼻甲烯基后聚合改性叠氮烯烃点击反应作者感谢Dr. p.r. Rajamohanan对NMR数据的解释。披露声明作者未报告潜在的利益冲突。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Norbornenyl-pendant aromatic (co)poly(ether ether ketone)s
Abstract4, 4'-(Bicyclo (2.2.1) hept-5-en-2 yl methylene) bis (2-methoxyphenol) (BPA-NB) was utilized as a step-growth monomer for the synthesis of (co)poly(ether ether ketone)s (PEEK-NBs) via nucleophilic aromatic substitution polycondensation. A homo and five PEEK-NBs were synthesized by polycondensation of 4, 4'-difluorobenzophenone with BPA-NB and various compositions of BPA-NB and bisphenol-A, respectively. 1H NMR spectroscopy confirmed the chemical structure and composition of PEEK-NBs. Inherent viscosity and number-average molecular weight values of PEEK-NBs were in the range 0.64 to 0.78 dL g−1 and 62,670 to 84,470 g mol−1, respectively, indicating the formation of polymers of reasonably high molecular weight. It was easy to dissolve PEEK-NBs in common organic solvents such as chloroform, dichloromethane, and tetrahydrofuran. Tough, transparent, and flexible films of PEEK-NBs could be cast from chloroform solution. X-Ray diffraction studies indicated amorphous nature of PEEK-NBs. Glass transition temperature (Tg) values, determined by DSC analysis, of PEEK-NBs were in the range 163 to190 °C and Tg values increased with the increase in mol % of BPA-NB. The post-polymerization modification of a representative PEEK-NB was demonstrated using two azido compounds, namely, 4-(azidomethyl)-7-methoxy-2H-chromen-2-one and 9-(azidomethyl)anthracene, via metal-free azide-alkene 1,3-dipolar cycloaddition reaction to obtain copoly(ether ether ketone)s appended with coumarinyl and anthracenyl moieties, respectively.Keywords: (Co)poly(ether ether ketone)snorbornenyl groupspost-polymerization modificationazide-alkene click reaction AcknowledgementsAuthors are grateful to Dr. P. R. Rajamohanan for help with interpretation of NMR data.Disclosure statementNo potential conflict of interest was reported by the author(s).
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来源期刊
CiteScore
4.60
自引率
16.00%
发文量
61
审稿时长
3.1 months
期刊介绍: Journal of Macromolecular Science, Part A: Pure and Applied Chemistry (JMS-PAC) is a necessary resource for academic and industrial scientists and engineers whose interests center on both synthetic and naturally occurring polymers and their applications.
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