Institute of Chemistry, University of Potsdam, Karl-Liebknecht Str. 24-25, 14476, Potsdam, Germany.
Federal Institute for Materials Research and Testing - BAM 1.3, Richard-Willstätter-Straße 11, 12489, Berlin, Germany.
Macromol Rapid Commun. 2020 Jan;41(1):e1900404. doi: 10.1002/marc.201900404. Epub 2019 Oct 3.
A series of phenolic-acid-based 2-oxazoline monomers with methoxy-substituted phenyl and cinnamyl side chains is synthesized and polymerized in a microwave reactor at 140 °C using methyl tosylate as the initiator. The obtained poly(2-oxazoline)s are characterized by NMR spectroscopy, MALDI-TOF mass spectrometry, and size-exclusion chromatography (SEC). Kinetic studies reveal that the microwave-assisted polymerization is fast and completed within less than ≈10 min for low monomer-to-initiator ratios of ≤25. Polymers with number-average molar masses of up to 6500 g mol and low dispersity (1.2-1.3) are produced. The aryl methyl ethers are successfully cleaved with aluminum triiodide/N,N'-diisopropylcarbodiimide to give a poly(2-oxazoline) with pendent catechol groups.
合成了一系列具有甲氧基取代苯基和肉桂基侧链的酚酸基 2-恶唑啉单体，并在微波反应器中于 140°C 下使用对甲苯磺酸甲酯作为引发剂聚合。通过 NMR 光谱、MALDI-TOF 质谱和尺寸排阻色谱（SEC）对得到的聚（2-恶唑啉）进行了表征。动力学研究表明，微波辅助聚合反应速度快，在低单体与引发剂比例≤25 的情况下，在不到≈10 分钟内完成。合成了数均摩尔质量高达 6500g/mol 且分散度低（1.2-1.3）的聚合物。用三碘化铝/N,N'-二异丙基碳二亚胺成功地将芳基甲基醚裂解，得到了带有邻苯二酚基团的聚（2-恶唑啉）。
