Journal
MACROMOLECULAR RAPID COMMUNICATIONS
Volume 35, Issue 15, Pages 1340-1344Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/marc.201400237
Keywords
block copolymer; condensation reaction; poly(disulfide)s; ring-opening polymerization; stoichiometric imbalance
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Funding
- IACS, Kolkata
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In this communication, a mild, efficient, and generalized polycondensation route is developed for poly(disulfide)s from commercially available monomers 2,2'-dithiodipyridine and 1,6-hexanedithiol. Using the stoichiometric imbalance between the two monomers, it is possible to produce telechelic poly(disulfide)s of predictable molecular weight with reactive pyridyl disulfide groups at both the terminals of the chain. The two terminal pyridyl disulfide groups can be quantitatively replaced by a functional thiol using selective thioldisulfide exchange and thus produces functional telechelic poly(disulfide)s, which can be used as a macroinitiator to initiate ring-opening polymerization of a cyclic lactide monomer generating an ABA-type triblock copolymer with degradable B block.
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