Preparing a functionalized thermoplastic elastomer: Chlorination and synthesis of poly(p-methylstyrene)-block-polyisoprene-block-poly(p-methylstyrene)

Polyethylene-Based Block Copolymers for Anion Exchange Membranes

“…Living anionic polymerization was selected since this technique offers significant advantages over other polymerization methods to synthesize a well-defined PB block with high 1,4 enchainment of monomer. While the anionic polymerization of butadiene has been widely studied, few references to the anionic polymerization of 4-methylstyrene exist. ,− A block copolymer of butadiene and 4-methylstyrene can be produced through either reacting butadiene or 4-methylstyrene as the first block. However, the chain transfer to toluene in butyllithium initiated anionic polymerization of styrene is well studied, and chain transfer to the para -methyl group is possible during the polymerization.…”

Synthesis and characterization of functionalized syndiotactic polystyrene copolymers

“…Figure 3(A) shows the 13 C‐NMR spectrum of the sPSMS‐ g ‐PIP, in which peaks at 110–112 ppm are derived from carbons of the double bonds of the isoprene moieties in the polymer 11. During the epoxidation reaction, Figure 3(B) reveals a decrease in the intensity of the peak at 110–112 ppm and a corresponding increase in the intensity of the epoxy ring at 50–60 ppm.…”

Method of determining the absolute molecular weight from gel permeation chromatograms for star‐shaped styrenic block copolymers

“…Peak a at the higher elution time corresponds to the linear SSTM chains, and peak b at the lower elution time corresponds to the star‐shaped polystyrene. The oligomerizing efficiency of SSTM arms by n ‐BuLi was determined from this GPC chromatogram on the basis of the relative magnitudes of the areas underneath the two peaks 20, 21. An oligomerizing efficiency as high as 86% was attained in our experiments.…”