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Issue 9, 2009
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Synthesis and characterization of block copolymers comprising a polyrotaxane middle block flanked by two brush-like PCL blocks

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Abstract

A polyrotaxane was prepared via atom transfer radical polymerization (ATRP) of 2-hydroxyethyl methacrylate (HEMA) initiated by a polypseudorotaxane self-assembled from a distal 2-bromoisobutyryl end-capped poly(ethylene glycol) (BriB–PEG–iBBr) with α-cyclodextrins (α-CDs). Then it was used to initiate bulk ring-opening polymerization (ROP) of ε-caprolactone (CL) to give block copolymers comprising a polyrotaxane middle block flanked by two brush-like polycaprolactone (PCL) blocks. The structure of both the polyrotaxane and its CL derivatives was characterized by 1H NMR, GPC, FT-IR, XRD, DSC and TG analyses. These polyrotaxane-derived block brush-like copolymers can be cast into self-standing films from CH2Cl2 and self-assemble into nano-sized particles in THF as well. Furthermore they can melt at round 60 °C, showing the potential for melt-processing.

Graphical abstract: Synthesis and characterization of block copolymers comprising a polyrotaxane middle block flanked by two brush-like PCL blocks

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Publication details

The article was received on 23 Oct 2008, accepted on 12 Jan 2009 and first published on 17 Feb 2009


Article type: Paper
DOI: 10.1039/B818819J
Soft Matter, 2009,5, 1848-1855

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    Synthesis and characterization of block copolymers comprising a polyrotaxane middle block flanked by two brush-like PCL blocks

    X. Tong, X. Zhang, L. Ye, A. Zhang and Z. Feng, Soft Matter, 2009, 5, 1848
    DOI: 10.1039/B818819J

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