CJCU

Chem. J. Chinese Universities ›› 1987, Vol. 8 ›› Issue (9): 856.

• Articles • Previous Articles     Next Articles

Polymerization of Polypropylene Oxide in the Presence of a Triethylaluminium-Monoalkyl-Phosphate Catalytic System and Study of 13C-NMR Spectra of Polymer

Ye Hongwei1, Wang Xinling2, Hu Gengyuan2, Yang Shilin2   

  1. 1. Central Laboratory, Zhejiang University, Hangzhou;
    2. Department of Chemistry, Zhejiang University, Hangzhou
  • Received:1986-03-11 Online:1987-09-24 Published:1987-09-24

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Abstract: A catalytic system, (C2H5)3A1/ROPO(OH)2, exhibits higher activity in the polymerization of propylene oxide(PO), The polypropylene oxide and its crystalline acetone-insoluble fraction were determined by the 13C-NMR.In the 13C-NMR spectra of the PPO, we discovered the most direct way of identifying the two kinds of lines. As an illustration, the two kinds of lines in 13C-NMR were due to results of methine and methylene carbons of a high molecular weight PPO, respectively. Chemical-shift and split of four configuration of isotactic, heterotactic and syndiotactic have already been compared for the PPOwith different catalytic systems, (C2H5)3A1/ROPO(OH)2, (C2H5)3A1/H3PO4,and(C2H5)3Al/AcAc/H2O.

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