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Bio‐based hyperbranched polyurethane/Fe 3 O 4 nanocomposites as shape memory materials
Author(s) -
Kalita Hemjyoti,
Karak Niranjan
Publication year - 2013
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/pat.3149
Subject(s) - nanocomposite , materials science , polyurethane , thermal stability , polymer , fourier transform infrared spectroscopy , shape memory polymer , nanoparticle , thermogravimetric analysis , ultimate tensile strength , composite material , transmission electron microscopy , polymerization , chemical engineering , polymer nanocomposite , in situ polymerization , nanotechnology , engineering
The bio‐based shape memory polymers have generated immense interest as advanced smart materials. Mesua ferrea L. seed oil‐based hyperbranched polyurethane (HBPU)/Fe 3 O 4 nanocomposites were prepared by the in‐situ polymerization technique. The transmission electron microscopy confirmed the homogeneous distribution of the Fe 3 O 4 nanoparticles in polymer matrix, whereas Fourier transform infrared spectroscopic study revealed the presence of strong interfacial interactions between them. The incorporation of Fe 3 O 4 (0 to 10 wt%) into the HBPU resulted in an increase in tensile strength (5.5–15 MPa) and scratch resistance (3–6 kg). The thermo‐gravimetric analysis indicated the improvement of thermal stability (240–270°C) of the nanocomposites. The nanocomposites exhibited full shape fixity, as well as almost full shape recovery under the microwave stimulus. The shape recovery speed increased with the increase of Fe 3 O 4 nanoparticles content in the nanocomposites. Thus, the studied nanocomposites might be used as advanced shape memory materials in different potential fields. Copyright © 2013 John Wiley & Sons, Ltd.