Unsaturation in Isoprene-Isobutylene Copolymers

Gradient Density Grafted Polymers on Ground Tire Rubber Particles by Atom Transfer Radical Polymerization

“…P1 showed the presence of double bonds on the surface as it was evidenced by attenuated total reflection infrared spectroscopy (ATR‐IR) and confirmed by an indirect titration method usually applied to measure the content of double bonds in oils and in fats32 according to the following equations: The titration results highlighted that P1 particles are characterized by 10.5 × 10 −4 mol · g −1 CC double bonds on the surface.…”

Radiochemical determination of low unsaturations in polyisobutene. Stoichiometry of the reaction between chlorine and branched double bonds

“…The weight per cent unsaturation values obtained from Figure 2 are 28 for diisobutene (I), 27 for diisobutene (11), and 22 for the trimer. These values are about 13 and 25% higher than the theoretical values for the incorporation of one C1 atom per double bond in dimer and trimer, respectively, and clearly fall very far short of the theoretical values for two C1 atoms per double bond.…”

Synthesis of water‐soluble telechelic methyl‐ketone‐ended oligo‐N,N‐dimethylacrylamides by the ozonolysis of poly(N,N‐dimethylacrylamide‐stat‐2,3‐dimethylbutadiene)s

“…The copolymers were recovered by precipitation in methanol and were purified by reprecipitation from benzene/methanol. Average molecular weights (MW) and polydispersities (PD) of the copolymers were measured by gel permeation chromatography (GPC) in aqueous sodium nitrate (0.1M) using a Waters 510 chromatograph equipped with two 60 cm Polymer Laboratories columns packed with 10 pm PLgel beads of mixed pore size, and a Waters 410 refractive index detector. The columns were calibrated with a set of narrow molecular weight distribution (MWD) poly(ethy1ene oxide) standards.…”