The activity of the unfunctional poly(butadiene) coagents correlates strongly with the vinyl content.
The hybrid structure of the poly(butadiene) diacrylate incorporates Type I and Type II reactive groups in one molecule.
Drawing definite conclusions regarding the relative reactivity of acrylate ester functionality when attached terminally to a reactive poly(butadiene) or whether present as an individual component in a blend at equimolar concentration may not be possible with this limited data set.
In the fully saturated compound (CM), PBDDA lengthened scorch safety compared to the scorch-inhibited acrylate monomer, and increased modulus while reducing permanent set relative to the high vinyl poly(butadiene).
High vinyl poly(butadiene) resins are Type II coagents containing less-reactive pendant vinylic structures.
A poly(butadiene) diacrylate ester was synthesized by reacting a terminally-functional high vinyl poly(butadiene) diol with acrylic acid.
In west Europe, butadiene extraction units will be required to run at high rates to supply slowly growing domestic demand and take advantage of high netback export sales where possible.
Butadiene has been trading at over $750 per ton in the U.S.