Uniting Group-Transfer and Ring-Opening Polymerization─Block Copolymers from Functional Michael-Type Monomers and Lactones

Functional block copolymers (COPs) were synthesized through the ring-opening polymerization, and the effects of COPs on the hydrolytic & oxidative degradation and mechanical properties of PCL/COP composites were studied.

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Imidazolium-Based Ionic Liquids as Initiators in Ring Opening Polymerization: Ionic Conduction and Dielectric Response of End-Functional Polycaprolactones and Their Block Copolymers

Macromolecular Chemistry and Physics ◽

10.1002/macp.201500424 ◽

2016 ◽

Vol 217 (11) ◽

pp. 1270-1281 ◽

Cited By ~ 9

Author(s):

U Hyeok Choi ◽

Anuj Mittal ◽

Terry L. Price ◽

Ralph H. Colby ◽

Harry W. Gibson

Keyword(s):

Ionic Liquids ◽

Block Copolymers ◽

Dielectric Response ◽

Ring Opening ◽

Ionic Conduction ◽

Ring Opening Polymerization

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Poly(methyl methacrylate)−Poly(caprolactone) AB and ABA Block Copolymers by Combined Ring-Opening Polymerization and Atom Transfer Radical Polymerization

Macromolecules ◽

10.1021/ma070417q ◽

2007 ◽

Vol 40 (25) ◽

pp. 8887-8896 ◽

Cited By ~ 27

Author(s):

Michèle Schappacher ◽

Nicolas Fur ◽

Sophie M. Guillaume

Keyword(s):

Block Copolymers ◽

Methyl Methacrylate ◽

Atom Transfer Radical Polymerization ◽

Radical Polymerization ◽

Ring Opening ◽

Ring Opening Polymerization ◽

Atom Transfer ◽

Poly Methyl Methacrylate ◽

Poly Caprolactone

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Biodegradable copolymers based on poly(ethylene oxide), polylactide and polydepsipeptide sequences with functional groups

e-Polymers ◽

10.1515/epoly.2001.1.1.4 ◽

2001 ◽

Vol 1 (1) ◽

Author(s):

Yakai Feng ◽

Doris Klee ◽

Hartwig Höcker

Keyword(s):

Block Copolymers ◽

Ethylene Oxide ◽

Aspartic Acid ◽

Functional Groups ◽

Ring Opening ◽

Ring Opening Polymerization ◽

Biodegradable Copolymers ◽

Protective Groups ◽

Poly Ethylene Oxide ◽

Poly Ethylene

AbstractFor the purpose of increasing the hydrophilicity of polylactide, new block copolymers with protected functional groups, poly(lactide-co-(S)-b-benzyl aspartate)-poly(ethylene oxide)-poly(lactide-co-(S)- b-benzyl aspartate), were synthesized via ring-opening polymerization of D,L-lactide and (3S, 6R,S)-3- [(benzyloxycarbonyl)methyl]-6-methylmorpholine-2,5-dione in the presence of hydroxyltelechelic poly(ethylene oxide) (PEO) as an initiator at 140 °C for 24 h. The benzyl protective groups of the block copolymers were completely removed to give poly(lactide-co-(S)-aspartic acid)-PEO-poly(lactide-co-(S)-aspartic acid), (poly(DLLA-co-Asp)-b-PEO-b-poly(DLLA-co-Asp)). This shows lower crystallization and melting temperature compared with the polymers before deprotection. Poly(DLLA-co-Asp)-b-PEO-b-poly(DLLA-co-Asp) with 55.6 wt.-% of PEO is more hydrophilic, shows higher water absorption and is degraded faster than with 39.5 wt.-% of PEO.

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