Citation: NI Shaoru, TANG Xuerning. THE MOLECULAR WEIGHT AND ITS DISTRIBUTION OF 1, 2-POLYBUTADIENES PREPARED WITH MOLYBDENUM CATALYST SYSTEMS*[J]. Chinese Journal of Polymer Science, ;1984, 2(1): 77-81. shu

THE MOLECULAR WEIGHT AND ITS DISTRIBUTION OF 1, 2-POLYBUTADIENES PREPARED WITH MOLYBDENUM CATALYST SYSTEMS*

NI Shaoru ,
TANG Xuerning

Received Date: 30 June 1983

The study on the molecular weight and its distribution of 1, 2-polybutadienes prepared with MoCl4OR-i-Bu2AlOR' catalyst systems has been carded out by viscosity and GPC methods. 1, 2-Polybutadienes with Mw/Mn=1.2-2.0can be obtained with these catalyst systems at 30—70℃. There is a linear relation between theMw/Mn and the polymerization temperature. It was found by extrapolation that these catalyst systems may possibly initiate a living polymerization at the temperature near 18℃. The molecular weight of the polymers can be regulated either by polymerization temperature or by adding polar compounds such as allyl halides.
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