Abstract
The anionic polymerization of isoprene with 2-ethylhexylsodium soluble in hydrocarbons in the absence of electron donor additives has been studied. The kinetics of the propagation reaction is shown to strongly depend on the solvent used. In toluene, the reaction order in initiator appears to be fractional, its value being dependent on the initiator concentration, while in heptane the first order is known to be followed. For polymerization in toluene, a scheme is suggested where monomeric and tetrameric active species are supposed to take part in propagation. With a non-linear regression fit, apparent constants in the equation describing this scheme were evaluated. The kinetics of isoprene polymerization with the mixed 2-ethylhexyl-sodium/2-ethylhexyllithium initiator, as well as UV spectra of the living polymers obtained, were also studied. Formation of complex active species is suggested.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
