Synthesis of Ultra-High Molecular Weight Polyolefins of Regular Structure in Octafluorobutane Medium

摘要

The suspension polymerization in octafluorobutane, initiated by Ziegler-Natta catalyst system, has been used to synthesize ultra-high molecular weight poly(1-hexene), poly(1-octene), and poly(1-decene) of regular structure with high yields. This technique makes it possible to successfully carry out reactions at close to room temperature, followed by easy isolation of polymer products. The regularity of the structure of the synthesized polymers was proved based on the data of H-1 and C-13 NMR spectroscopy. Using gel permeation chromatography, data on the molecular weight distribution of polymer molecules were obtained. They indicated that the weighted average mass of the synthesized polymers is many times higher than the mass of polyolefins produced by the classical technique of homogeneous polymerization.