Well defined block copolymers of e-caprolactone and L-lactide using Y5(u-O)(OiPR)13a as an iniator

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Abstract

Diblock copolymers composed of poly(ε-caprolactone) and poly(L-lactide) were synthesized via sequential living ring-opening polymerization of ε-caprolactone and L-lactide in dichloromethane initiated by Y5(µ-O)(OiPr)13 (yttrium isopropoxide). A series of diblock copolymers was synthesized with -caprolactone blocks of constant length (DP = 70) and lactide blocks of varying length (DP = 5-80), with polydispersities of 1,18-1,27. Molecular weights were close to theoretical values. 13C NMR spectroscopy shows the absence of transesterification reactions and racemization. The thermal properties of the block copolymers were studied using differential scanning calorimetry. The block copolymers show a certain degree of phase mixing depending on the length of the poly(L-lactide) blocks. Crystallization of L-lactide sequences did not occur when the block length consisted of less than 40 L-lactic acid residues
Original languageUndefined
Pages (from-to)1153-1161
JournalMacromolecular chemistry and physics
Volume196
Issue number196
DOIs
Publication statusPublished - 1995

Keywords

  • METIS-105353
  • IR-71208

Cite this

@article{d80795ce8c884d93a39ea7e253d3f9bf,
title = "Well defined block copolymers of e-caprolactone and L-lactide using Y5(u-O)(OiPR)13a as an iniator",
abstract = "Diblock copolymers composed of poly(ε-caprolactone) and poly(L-lactide) were synthesized via sequential living ring-opening polymerization of ε-caprolactone and L-lactide in dichloromethane initiated by Y5(µ-O)(OiPr)13 (yttrium isopropoxide). A series of diblock copolymers was synthesized with -caprolactone blocks of constant length (DP = 70) and lactide blocks of varying length (DP = 5-80), with polydispersities of 1,18-1,27. Molecular weights were close to theoretical values. 13C NMR spectroscopy shows the absence of transesterification reactions and racemization. The thermal properties of the block copolymers were studied using differential scanning calorimetry. The block copolymers show a certain degree of phase mixing depending on the length of the poly(L-lactide) blocks. Crystallization of L-lactide sequences did not occur when the block length consisted of less than 40 L-lactic acid residues",
keywords = "METIS-105353, IR-71208",
author = "W.M. Stevels and Ankone, {Martinus J.K.} and Dijkstra, {Pieter J.} and Jan Feijen",
year = "1995",
doi = "10.1002/macp.1995.021960415",
language = "Undefined",
volume = "196",
pages = "1153--1161",
journal = "Macromolecular chemistry and physics",
issn = "1022-1352",
publisher = "Wiley-VCH Verlag",
number = "196",

}

Well defined block copolymers of e-caprolactone and L-lactide using Y5(u-O)(OiPR)13a as an iniator. / Stevels, W.M.; Ankone, Martinus J.K.; Dijkstra, Pieter J.; Feijen, Jan.

In: Macromolecular chemistry and physics, Vol. 196, No. 196, 1995, p. 1153-1161.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Well defined block copolymers of e-caprolactone and L-lactide using Y5(u-O)(OiPR)13a as an iniator

AU - Stevels, W.M.

AU - Ankone, Martinus J.K.

AU - Dijkstra, Pieter J.

AU - Feijen, Jan

PY - 1995

Y1 - 1995

N2 - Diblock copolymers composed of poly(ε-caprolactone) and poly(L-lactide) were synthesized via sequential living ring-opening polymerization of ε-caprolactone and L-lactide in dichloromethane initiated by Y5(µ-O)(OiPr)13 (yttrium isopropoxide). A series of diblock copolymers was synthesized with -caprolactone blocks of constant length (DP = 70) and lactide blocks of varying length (DP = 5-80), with polydispersities of 1,18-1,27. Molecular weights were close to theoretical values. 13C NMR spectroscopy shows the absence of transesterification reactions and racemization. The thermal properties of the block copolymers were studied using differential scanning calorimetry. The block copolymers show a certain degree of phase mixing depending on the length of the poly(L-lactide) blocks. Crystallization of L-lactide sequences did not occur when the block length consisted of less than 40 L-lactic acid residues

AB - Diblock copolymers composed of poly(ε-caprolactone) and poly(L-lactide) were synthesized via sequential living ring-opening polymerization of ε-caprolactone and L-lactide in dichloromethane initiated by Y5(µ-O)(OiPr)13 (yttrium isopropoxide). A series of diblock copolymers was synthesized with -caprolactone blocks of constant length (DP = 70) and lactide blocks of varying length (DP = 5-80), with polydispersities of 1,18-1,27. Molecular weights were close to theoretical values. 13C NMR spectroscopy shows the absence of transesterification reactions and racemization. The thermal properties of the block copolymers were studied using differential scanning calorimetry. The block copolymers show a certain degree of phase mixing depending on the length of the poly(L-lactide) blocks. Crystallization of L-lactide sequences did not occur when the block length consisted of less than 40 L-lactic acid residues

KW - METIS-105353

KW - IR-71208

U2 - 10.1002/macp.1995.021960415

DO - 10.1002/macp.1995.021960415

M3 - Article

VL - 196

SP - 1153

EP - 1161

JO - Macromolecular chemistry and physics

JF - Macromolecular chemistry and physics

SN - 1022-1352

IS - 196

ER -