Synthesis of phase-separated super-H-shaped triblock architectures: poly(l-lactide) grafted from telechelic polyisoprene

Abstract

In the field of carbanionic polymerization bifunctional initiators permit the synthesis of complex triblock copolymer structures. Using 1,3 bis(1-phenylethenyl) benzene (PEB), isoprene was polymerized in cyclohexane, yielding high content of...

Bifunctional Carbanionic Synthesis of Fully Bio‐Based Triblock Structures Derived from β‐Farnesene and ll‐Dilactide: Thermoplastic Elastomers

“…A major challenge for actual application is to identify scalable processes with monomers that can be produced on large scale [3] . We recently presented a partly bio‐based material with a low T g PI midblock, flanked by outer high T g lactide blocks [8] . Here we aim at fully bio‐based TPEs, which are synthesized by combining carbanionic and ring‐opening polymerization.…”

“…[3] We recently presented a partly bio-based material with a low T g PI midblock, flanked by outer high T g lactide blocks. [8] Here we aim at fully bio-based TPEs, which are synthesized by combining carbanionic and ring-opening polymerization.…”

One-step Synthesis of Fully Biobased Two-Sided Tapered ABA-type Thermoplastic Elastomers

“…The poor solubility of bifunctional initiators in pure hydrocarbon solvents has resulted in only a few successful recent reports for classical systems of rather complex structures. − The addition of polar solvents or modifiers can prevent the aggregation of the bifunctional initiators, albeit with the drawback of an undesired high vinyl content of the resulting polydienes. , As the T g of PFar is not affected by the increased vinyl content, the use of a polar solvent is now feasible. The moderately polar solvent methyl tert -butyl ether (MTBE) was used due to its good solubilization of bifunctional initiators as well as its higher stability toward nucleophiles, which is a major limitation of other polar solvents, e.g., THF, and therefore restricts them to low temperatures .…”

Effect of tetrahydrofuran on the anionic copolymerization of 4‐trimethylsilylstyrene with isoprene

“…Since the discovery of living anionic polymerization in 1956, both industry and research have been using this technique to produce polymers with tailored properties, in particular block copolymers and other high-performance materials. [1][2][3][4][5][6][7][8][9] Most frequently, the products are based on styrene and diene monomers, which are polymerized under specific conditions to obtain nanophase-separated multiblock structures, which are used as thermoplastic elastomers.…”