Poly(ethylene glycol)-based shape-memory polymers. Issue 5 (4th July 2017)

• Record Type: Journal Article
• Authors: Boumezgane, Oussama; Messori, Massimo
• Is Part Of: International journal of polymer analysis and characterization. Volume 22:Issue 5(2017)
• Page Start: 463
• Page End: 471
• Publication Date: 2017-07-04
• Subjects: Blends -- one-way shape-memory effect -- poly(ethylene glycol) -- shape-memory polymers; Polymers -- Analysis -- Periodicals; 547.705
• DOI: 10.1080/1023666X.2017.1324589
• Languages: English
• ISSNs: 1023-666X

Abstract

ABSTRACT: Poly(ethylene glycol) (PEG) blends photo-curable and thermal activated shape-memory polymers (SMPs), with different activation temperature ( T switch ), have been synthesized and characterized. PEG blends with different molecular weights were chain-end functionalized with isocyanate ethyl methacrylate and photo-cured with UV lamp. Degree of cross-linking of the blend network, determined by gel content measurement, resulted as higher than 95%. The thermal and thermomechanical properties of these SMPs PEG blends were characterized by differential scanning calorimetry and dynamic mechanical analysis. The shape-memory properties of the networks were quantified using thermomechanical three-point bending experiments and showed strain fixity rates higher than 99% and a minimum strain recovery ratio of 82%.