Stereoregularity of Poly (lactic acid) and their Model Compounds as studied by NMR and Quantum Chemical Calculations

K Suganuma, K Horiuchi, H Matsuda, HN Cheng…

文献索引：Suganuma, Koto; Horiuchi, Ken; Matsuda, Hironori; Cheng; Aoki, Akihiro; Asakura, Tetsuo Macromolecules, 2011 , vol. 44, # 23 p. 9247 - 9253

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被引用次数: 6

摘要

In order to understand the origin of the tacticity splitting in the NMR spectra of poly (lactic acid), monomer and dimer model compounds were synthesized and their 1H and 13C NMR chemical shifts were observed. Two stable conformations were obtained from Ramachandran map calculated as a function of the internal rotation angles for the monomer model using Gaussian 09 calculations. Four preferred conformations were selected and ...