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Influence of diphenyl ether and water on the polymerization of isoprene with triisobutylaluminium and titanium tetrachloride
Author(s) -
Gippin Morris
Publication year - 1970
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1970.070140715
Subject(s) - isoprene , catalysis , ether , polymerization , titanium tetrachloride , diphenyl ether , chemistry , polymer chemistry , diethyl ether , organic chemistry , polymer , copolymer
In the polymerization of isoprene with the i‐Bu 3 Al/TiCl 4 catalyst at the mole ratio of 1.0 the diphenyl ether adduct of the i‐Bu 3 Al showed no effect on the catalyst efficiency. The ether did not improve the low efficiency of the catalyst at ratios slightly above 1.0, but below 1.0 it brought the catalyst activity up to optimum. The ether compensated for the deleterious effects upon the catalyst of low amounts of water present in the isoprene solution in hexane. At the Al/Ti mole ratio slightly above 1.0, water and diphenyl ether were found to act synergistically in raising catalyst efficiency. In addition, at or close to optimal operating Al/Ti mole ratios the diphenyl ether had a very marked effect in improving the polymerization rate. Polymer properties were generally unaffected by use of the ether‐coordinated catalyst.