Citation:
HU Zhenya, LI Shuquan, LIN Yunqing. PREPARATION AND CHARACTERIZATION OF cis-,4-POLYBUTADIENE CONTAINING A FRACTION OF trans-1,4-POLYBUTADIENE*[J]. Chinese Journal of Polymer Science,
1984, 2(1): 12-18.
PREPARATION AND CHARACTERIZATION OF cis-,4-POLYBUTADIENE CONTAINING A FRACTION OF trans-1,4-POLYBUTADIENE*
摘要:
Polymerization of butadiene catalysed first with V(acac)3-Al(i-Bu)2Cl, then with Co(acac)3-H2O-Al(i-Bu)2Cl has been studied. The polymer obtained was identified to be a new variety of cis-1,4-polybutadiene which contained a fraction of trans-1,4-polybutadiene chemically bonded to the cis-1,4-polybutadiene chains. Its molecular weight and trans-1,4 content can be regulated by varying the catalyst composition and concentration as well as other polymerization conditions. The trans-1,4 fraction, although it presents only in 9—16% forms a crystalline phase in the matrix at room temperature and facilitates the crystallization of the polymer.
English
PREPARATION AND CHARACTERIZATION OF cis-,4-POLYBUTADIENE CONTAINING A FRACTION OF trans-1,4-POLYBUTADIENE*
Abstract:
Polymerization of butadiene catalysed first with V(acac)3-Al(i-Bu)2Cl, then with Co(acac)3-H2O-Al(i-Bu)2Cl has been studied. The polymer obtained was identified to be a new variety of cis-1,4-polybutadiene which contained a fraction of trans-1,4-polybutadiene chemically bonded to the cis-1,4-polybutadiene chains. Its molecular weight and trans-1,4 content can be regulated by varying the catalyst composition and concentration as well as other polymerization conditions. The trans-1,4 fraction, although it presents only in 9—16% forms a crystalline phase in the matrix at room temperature and facilitates the crystallization of the polymer.
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