25. Modification of High cis-1, 4 Polybutadiene by Neodymiun Catalyst

摘要: High cis-1,4 polybutadiene was modified with tin compound. The polymerization of 1,3-butadiene carried out in the presence a catalyst comprised (a) neodymium 2-ethylhexanoate, (b) triisobutyl aluminium, (c) diiso-butyl aluminium hydride, (d) ethylaluminiumsesqui chloride and (e) acetylacetone. reactive polymer then triphenyltin chloride. prepared as described above showed high cis -1, 4 structure content broad molecular weight distribution. increased decrease polybutadiene. This means that increase numbers molecules. can be also seen by GPC measurement RI UV dual detectors: is, intensity absorbance at low region higher than region. From these results, this is thought to compound chain terminal end.