Journal
MACROMOLECULAR RAPID COMMUNICATIONS
Volume 37, Issue 20, Pages 1676-1681Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/marc.201600309
Keywords
crystallization; cyclic block copolymers; poly(epsilon-caprolactone)
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Funding
- Spanish MINECO [MAT2014-53437-C2-P, MAT2015-63704-P]
- Basque Government [IT-654-13]
- Science Policy Office of the Belgian Federal Government [PAI 7/5]
- Belgian FRFC-FNRS [2.4508.12]
- UPV/EHU
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The synthesis of symmetric cyclo poly(epsilon-caprolactone)-block-poly(l(d)-lactide) (c(PCL-b-PL(D)LA)) by combining ring-opening polymerization of epsilon-caprolactone and lactides and subsequent click chemistry reaction of the linear precursors containing antagonist functionalities is presented. The two blocks can sequentially crystallize and self-assemble into double crystalline spherulitic superstructures. The cyclic chain topology significantly affects both the nucleation and the crystallization of each constituent, as gathered from a comparison of the behavior of linear precursors and cyclic block copolymers. The stereochemistry of the PLA block does not have a significant effect on the nonisothermal crystallization of both linear and cyclo PCL-b-PDLA and PCL-b-PLLA copolymers.
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