NDLI: Degradable shape-memory polymer networks from oligo[(l-lactide)-ran-glycolide]dimethacrylates

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Supercritical water: a fascinating medium for soft matter

Electrochemically enabled polyelectrolyte multilayer devices: from fuel cells to sensors

Giant vesicles in electric fields

Surface-based lipid vesicle reactor systems: fabrication and applications

Honeycomb coated particles: porous doughnuts, golf balls and hollow porous pockets

Inkjet printed water sensitive transparent films from natural gum–carbon nanotube composites

Adhesion induced non-planar and asynchronous flow of a giant vesicle membrane in an external shear flow

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Columnar phase structures of an organic–inorganic hybrid functionalized with eight calamitic mesogens

Grafting liquid crystalline polymers from cellulose substrates using atom transfer radical polymerization

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On the stress and torque tensors in fluid membranes

Supramolecular assembly of water-soluble poly(ferrocenylsilanes): multilayer structures on flat interfaces and permeability of microcapsules

Novel conducting nanocomposites: synthesis of triphenylene-covered gold nanoparticles and their insertion into a columnar matrix

Degradable shape-memory polymer networks from oligo[(l-lactide)-ran-glycolide]dimethacrylates

The preparation of regenerated silk fibroin microspheres

Polymer nanostructures in sub-micron lithographically defined channels: film-thickness effects on structural alignment of a small feature size polystyrene–polyisoprene–polystyrene block copolymer

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Degradable shape-memory polymer networks from oligo[(l-lactide)-ran-glycolide]dimethacrylates

Content Provider	Royal Society of Chemistry (RSC)
Author	Choi, Nok-young Lendlein, Andreas
Copyright Year	2007
Abstract	In this paper degradable shape-memory polymer networks synthesized from oligo[(L-lactide)-ran-glycolide]dimethaycrylates are introduced. The macrodimethacrylates are prepared via a two-step synthesis: hydroxy telechelic oligo[(L-lactide)-ran-glycolide]s with number average molecular weights Mn ranging from 1000 to 5700 g mol−1 were synthesized by ring-opening polymerization from L,L-dilactide, diglycolide and ethylene glycol as initiator using dibutyltin oxide as the catalyst. These oligodiols are reacted with methacryloyl chloride resulting in terminal methacrylate groups. Crosslinking of macrodimethacrylates is performed under exposure to UV light without applying a photo initiator. The polymer networks obtained are transparent and hydrolytically degradable. While the mechanical properties at temperatures higher than Tg depend on crosslinking density, Tg is almost constant at about 55 °C. The shape-memory functionality of the amorphous polymer network was investigated by cyclic, thermomechanical tests under the systematic variation of different programming parameters. Good shape-memory properties with strain recovery rates close to 100% were obtained under stress-controlled programming. Under strain-controlled conditions, it needs to be considered that relatively high stresses can be generated during programming. Potential biomedical applications are intelligent implants or smart drug release systems.
Starting Page	901
Ending Page	909
Page Count	9
File Format	HTM / HTML PDF
ISSN	1744683X
Volume Number	3
Issue Number	7
Journal	Soft Matter
DOI	10.1039/b702515g
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Ethylene glycol Ring-opening polymerization Methacryloyl chloride Polymer Oligomer Shape-memory polymer Dibutyltin oxide
Content Type	Text
Resource Type	Article
Subject	Chemistry Condensed Matter Physics

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Synthesis of water-soluble poly[oligo(ethylene glycol) methacrylate]s by living anionic polymerization of oligo(ethylene glycol) vinyl ether methacrylates

Synthesis and characterization of star-shaped poly(d,l-lactide)-block-poly(ethylene glycol) copolymers

Preparation and properties of poly(ethylene oxide) star polymers (2001).

Synthesis and characterization of biodegradable block copolymers of ?-caprolactone and D,L-lactide initiated by potassium poly(ethylene glycol)ate

Controlled ring-opening polymerization of lactide and glycolide.

Poly(?-caprolactone-b-glycolide) and poly(D,L-lactide-b-glycolide) diblock copolyesters: Controlled synthesis, characterization, and colloidal dispersions

Preparation and Swelling Behavior of L-Lactide Interpenetrating Networks

Salt-induced reentrant hydrogel of poly(ethylene glycol)–poly(lactide-co-glycolide) block copolymers

Dispersion polymerization of L-lactide in supercritical carbon dioxide

Degradable shape-memory polymer networks from oligo[(l-lactide)-ran-glycolide]dimethacrylates

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