Controlled ‘‘Grafting-from” of poly[styrene-co-maleic anhydride] onto polydienes using nitroxide chemistry
-
Bonilla-Cruz, José; Guerrero-Sánchez, Carlos; Schubert, Ulrich S.; Saldívar-Guerra, Enrique
- Abstract:
- High-throughput experimentation was used for the functionalization of polybutadiene and
polyisoprene with several kinds of nitroxide moieties at 135 C, as well as for kinetic investigations
of the controlled free radical grafting of styrene and maleic anhydride onto the
functionalized polydienes at 125 C. The functionalized polymers were analyzed by GPC,
1H NMR and FT-IR and the control of the grafting process was assessed by kinetic measurements
and GPC analysis. The best control in the molecular weight of the grafts was
observed for the polydienes functionalized with 4-oxo-TEMPO. TEMPO functionalization
did not render sufficient nitroxide moieties to achieve controlled grafting, while polydienes
functionalized with other 4-hydroxy TEMPO derivatives exhibited some level of grafting
control at early reaction times, which was lost in later stages of the polymerization reaction.
SG1 apparently decomposed at the tested reaction temperatures, as polydienes functionalized
with SG1 did not show any level of control during the grafting process.
- Year:
- 2010
- Type of Publication:
- Article
- Journal:
- European Polymer Journal
- Volume:
- 46
- Pages:
- 298 - 312