Shape Memory of Hydrogen-Bonded Polymer Network/Poly(ethylene glycol) Complexes

Shape Memory of Hydrogen-Bonded Polymer Network/Poly(ethylene glycol) Complexes

Because of a large difference in storage modulus below and above the glass transition temperature, poly(acrylic acid-co-methyl methacrylate)/poly(ethylene glycol) (P(AA-co-MMA)/PEG) complexes show shape memory properties with a recovery ratio of nearly reach 99%. Before the shape memory testing, it...

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Veröffentlicht in:Macromolecules 2004-03, Vol.37 (6), p.2228-2232
Hauptverfasser: Liu, Guoqin, Ding, Xiaobing, Cao, Yiping, Zheng, Zhaohui, Peng, Yuxing
Format: Artikel
Sprache:eng
Schlagworte:
Applied sciences
Exact sciences and technology
Organic polymers
Physicochemistry of polymers
Properties and characterization
Solution and gel properties
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Zusammenfassung:Because of a large difference in storage modulus below and above the glass transition temperature, poly(acrylic acid-co-methyl methacrylate)/poly(ethylene glycol) (P(AA-co-MMA)/PEG) complexes show shape memory properties with a recovery ratio of nearly reach 99%. Before the shape memory testing, it was necessary to determine the conformational changes of the P(AA-co-MMA) gel induced by complexation with linear PEG. It was found that both the concentration and molecular weight of PEG have a strong effect on the complexation with P(AA-co-MMA) gel. In such a system the minimum molecular weight of PEG required for the complex formation lowers to 1000.
ISSN:0024-9297
1520-5835
DOI:10.1021/ma035717w