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Issue 45, 2015
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Synthesis of AB block and A2B2 and A3B3 miktoarm star-shaped copolymers using ω-end-functionalized poly(methyl methacrylate) with a hydroxyl group prepared by organocatalyzed group transfer polymerization

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Abstract

The synthesis of miktoarm star-shaped polymers has been studied using various poly(methyl methacrylate)s (PMMAs) functionalized with a hydroxyl group, which were prepared by organocatalyzed group transfer polymerization (GTP) of methyl methacrylate, followed by Mukaiyama aldol-type termination of a silyl ketene acetal (SKA) moiety at the living PMMA end. To further elucidate this method, the effects of the employed catalysts, polymer chain length, and benzaldehyde derivatives on the ω-end-functionalization efficiency (%F) were investigated in detail. The electrophilic termination of the living PMMA end with benzaldehyde as the terminator produced a structurally defect-free ω-end-functionalized PMMA with a hydroxyl group (PMMA-OH). In addition, a two-arm PMMA with two hydroxyl groups (PMMA2-OH2) and a three-arm star-shaped PMMA with three hydroxyl groups (PMMA3-OH3), whose hydroxyl groups were located at the polymer chain centers, were prepared using terephthalaldehyde and benzene-1,3,5-tricarbaldehyde, respectively. The PMMA-OH, PMMA2-OH2, and PMMA3-OH3 obtained were then used as macroinitiators for the ring-opening polymerization (ROP) of D-lactide (DLA) to synthesize an AB block copolymer, and A2B2 and A3B3 type miktoarm copolymers.

Graphical abstract: Synthesis of AB block and A2B2 and A3B3 miktoarm star-shaped copolymers using ω-end-functionalized poly(methyl methacrylate) with a hydroxyl group prepared by organocatalyzed group transfer polymerization

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Publication details

The article was received on 16 Jul 2015, accepted on 13 Sep 2015 and first published on 15 Sep 2015


Article type: Paper
DOI: 10.1039/C5PY01112D
Author version available: Download Author version (PDF)
Citation: Polym. Chem., 2015,6, 7841-7850
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    Synthesis of AB block and A2B2 and A3B3 miktoarm star-shaped copolymers using ω-end-functionalized poly(methyl methacrylate) with a hydroxyl group prepared by organocatalyzed group transfer polymerization

    O. Eric, Y. Chen, K. Takada, S. Sato, T. Satoh and T. Kakuchi, Polym. Chem., 2015, 6, 7841
    DOI: 10.1039/C5PY01112D

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