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Investigation of microstructure in poly(methyl methacrylate) prepared via ambient temperature ARGET-ATRP: a combined approach of 1D and 2D NMR spectroscopy
Journal of Polymer Research ( IF 2.6 ) Pub Date : 2020-06-30 , DOI: 10.1007/s10965-020-02153-x
Anjana Dhar , Upendra Singh , Bishnu P. Koiry , Bikash Baishya , Dhruba J. Haloi

This investigation reports the analysis of different microstructures present in poly(methyl methacrylate) (PMMA) using1D and 2D NMR spectroscopy. The PMMA used in this study has been prepared via activators regenerated by electron transfer atom transfer radical polymerization (ARGET-ATRP) in DMF at ambient temperature using methyl 2-chloro propionate (MCP) as initiator, CuBr2 as catalyst in combination with N, N, N´, N´´, N´´- pentamethyldiethylenetriamine (PMDETA) as ligand and ascorbic acid as reducing agent.13C NMR, which provides good information about tacticity of a polymer, has been used extensively along with 1H NMR spectroscopy to extract the information about the different microstructures present in PMMA. Heteronuclear multiple-bond correlation (HMBC), heteronuclear single-quantum coherence (HSQC), and total correlation spectroscopy (TOCSY) were also used to study the position of protons, couplings with carbon etc. in the PMMA.



中文翻译:

通过环境温度ARGET-ATRP制备的聚(甲基丙烯酸甲酯)的微观结构的研究:1D和2D NMR光谱的组合方法

此调查报告存在于聚不同微观结构的分析甲基丙烯酸甲酯)(PMMA)using1D和2D NMR光谱。本研究中使用的PMMA是通过活化剂制备的,该活化剂是在环境温度下,使用2-氯丙酸甲酯(MCP)作为引发剂,CuBr 2与N结合作为催化剂,在DMF中通过电子转移原子转移自由基聚合(ARGET-ATRP)再生的活化剂制备的。 N,N´,N´´,N´´-五甲基二亚乙基三胺(PMDETA)作为配体,抗坏血酸作为还原剂。13 C NMR可提供有关聚合物立构规整度的良好信息,已与1一起广泛使用。1 H NMR光谱提取有关PMMA中存在的不同微观结构的信息。还使用异核多键相关(HMBC),异核单量子相干(HSQC)和全相关光谱(TOCSY)来研究PMMA中质子的位置,与碳的偶联等。

更新日期:2020-06-30
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