Accession Number:

AD0676424

Title:

THE POLYMERIZATION OF ISOPRENE WITH SEC-BUTYLLITHIUM IN HEXANE,

Descriptive Note:

Corporate Author:

NATIONAL RESEARCH COUNCIL OF CANADA OTTAWA (ONTARIO) DIV OF APPLIED CHEMISTRY

Personal Author(s):

Report Date:

1968-04-01

Pagination or Media Count:

4.0

Abstract:

The polymerization of isoprene in n-hexane, initiated by sec-butyllithium, has been investigated with particular emphasis on the initiation step. The mechanism of chain initiation appears to be quite different from that previously observed in benzene and involves direct attack of sec-butyllithium tetramers on isoprene. The effect of lithium t-butoxide has been investigated and found to accelerate the initiation rate but to depress the propagation rate. Some experiments were carried out to determine the rate of intermolecular exchange between sec-butyllithium and polyisoprenyllithium. Author

Subject Categories:

  • Organic Chemistry
  • Elastomers and Rubber

Distribution Statement:

APPROVED FOR PUBLIC RELEASE