Electronic Resource
Hoboken, NJ
:
Wiley-Blackwell
Journal of Polymer Science
45 (1960), S. 509-518
ISSN:
0022-3832
Keywords:
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Physics
Notes:
Polymerization of 4-methyl-1-pentene was carried out at 40°C. in n-heptane with the use of catalysts prepared from TiCl4 and triethylaluminum or triisobutylaluminum. Yield of polymer at the end of a fixed time (4 hr.) was used as a measure of catalyst activity. Solubility of the polymer in boiling heptane was used as a measure of stereospecificity. Both activity and stereospecificity are strongly affected by the ratio of aluminum alkyl to titanium tetrachloride in the catalyst. Yield was greatest for catalysts in which Al/Ti was between 1.2 and 2.0. Highest percentage of heptane-insoluble polymer was obtained at Al/Ti equals; 1. Stereospecificity was little affected by the monomer/catalyst ratio in the ranges studied. Catalysts prepared from triethylaluminum gave slightly higher percentages of heptane-insoluble polymer than did triisobutylaluminum.
Additional Material:
2 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/pol.1960.1204514619
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