Synthesis and characterization of block copolymers comprising a polyrotaxane middle block flanked by two brush-like PCL blocks
- 1 January 2009
- journal article
- Published by Royal Society of Chemistry (RSC) in Soft Matter
- Vol. 5 (9), 1848-1855
- https://doi.org/10.1039/b818819j
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.Keywords
This publication has 27 references indexed in Scilit:
- Cyclodextrin-based supramolecular architectures: Syntheses, structures, and applications for drug and gene deliveryAdvanced Drug Delivery Reviews, 2008
- Covalently immobilized biosignal molecule materials for tissue engineeringSoft Matter, 2007
- A preliminary study for fiber spinning of mixed solutions of polyrotaxane and cellulose in a dimethylacetamide/lithium chloride (DMAc/LiCl) solvent systemPolymer, 2006
- Slide-ring gel: Topological gel with freely movable cross-linksPhysica B: Condensed Matter, 2006
- Novel triblock copolymers synthesized via radical telomerization of N-isopropylacrylamide in the presence of polypseudorotaxanes made from thiolated PEG and α-CDsPolymer, 2006
- Thermally responsive polyrotaxanes synthesized through the telomerization ofN-isopropylacrylamide with polypseudorotaxanes made from α-cyclodextrin threaded onto thiolated poly(ethylene glycol)Journal of Polymer Science Part A: Polymer Chemistry, 2006
- Solid-State End-Capping of Pseudopolyrotaxane Possessing Hydroxy-Terminated Axle to Polyrotaxane and Its Application to the Synthesis of a Functionalized Polyrotaxane Capable of Yielding a Polyrotaxane NetworkMacromolecules, 2004
- Supramolecular Design for Multivalent Interaction: Maltose Mobility along Polyrotaxane Enhanced Binding with Concanavalin AJournal of the American Chemical Society, 2003
- Formation of Supramolecular Hydrogels Induced by Inclusion Complexation between Pluronics and α-CyclodextrinMacromolecules, 2001
- Preparation and characterization of polyrotaxanes containing many threaded .alpha.-cyclodextrinsThe Journal of Organic Chemistry, 1993