Title: CRYSTALLIZABLE POLYISOPRENE UNDER STRAIN OBTAINED BY ND-BASED CATALYST
Page Range: p.69-72
Author(s): Guilian Li; Weidong Yin
File size: 265K
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Journal: Polymers and Polymer Composites
Issue Year: ppc
Volume: 20
Issue No: No.1-2
Abstract
The conventional Ziegler-Natta catalyst composed of neodymium versatate (Nd(vers)3), alkylaluminium (Al(iBu)2H or Al(i-Bu)3) and diisobutylaluminium chloride (Al(i-Bu)2Cl) was examined in isoprene polymerisation. The polymer with narrow molecular weight distribution (Mw/Mn < 3) can be obtained by controlling Al(i-Bu)2H amounts and component addition order. While, polyisoprene with high cis-1,4 content (> 96%), high molecular weight (> 100×104) and narrow molecular weight distribution (Mw/Mn < 2.2) is synthesised by using Al(i-Bu)3 as cocatalyst. In the meantime, the obtained polymer has crystallisation behaviour under strain. 12 Refs.
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