ISSN:
0025-116X
Keywords:
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Physics
Notes:
Lithium diisopropylamide in the presence of diisopropylamine initiates the polymerization of isoprene to form oligomers with one diisopropylamino end group. The molecular weight of the oligomers formed is strongly dependent on the mole ratio diisopropylamine/lithium diisopropylamide. For instance, more than 70% of the oligomers obtained have an average molecular weight of 1 000, provided the reaction is run with an initial mole ratio 1:2 of amine to amide. Reactivities of several allylamine derivatives including the oligomers with amino end groups were studied in regard to their ability as chain transfer agents in the anionic polymerization of isoprene. According to the 1H NMR analysis, these oligomers contain 90% 1,4- and 10% 3,4-enchainments.
Additional Material:
4 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/macp.1983.021840408