RT Journal Article
T1 Relaxation Dynamics in Polyethylene Glycol/Modified Hydrotalcite Nanocomposites
A1 Arrigo, Rossella
A1 Antonioli, Diego
A1 Lazzari, Massimo
A1 Gianotti, Valentina
A1 Laus, Michele
A1 Montanaro, Laura
A1 Malucelli, Giulio
K1 Rheological behavior
K1 Polyethylene glycol
K1 Organo-modified hydrotalcite
K1 Grafting reactions
K1 Annealing
AB Polyethylene glycol-based nanocomposites containing an organo-modified hydrotalcite with loadings ranging from 0.5 to 5 wt.% were prepared by melt mixing performed just above the melting point of the polymer matrix. In these conditions, the dispersion of the nanofiller within the polymer matrix was quite homogeneous as revealed by TEM analyses. The effect of various thermal treatments and filler loadings was thoroughly investigated by means of rheological, morphological and gas chromatography-mass spectrometry, hyphenated to thermogravimetry analysis tests. Unfilled polyethylene glycol exhibited a continuous decrease in complex viscosity upon heating. In contrast, the complex viscosity of nanocomposites containing nanofiller loadings higher than 1 wt.% showed first a decrease, followed by an increase in the complex viscosity as the temperature increases, exhibiting a minimum between 130 and 140 °C. Annealing at 180 °C for different times further increased the viscosity of the system. This unusual behavior was explained by the occurrence of grafting reactions between the –OH terminal groups of the polyethylene glycol chains and the hydroxyl groups of the organo-modified filler, thus remarkably affecting the relaxation dynamics of the system
PB MDPI
YR 2018
FD 2018
LK http://hdl.handle.net/10347/22327
UL http://hdl.handle.net/10347/22327
LA eng
NO Arrigo, R.; Antonioli, D.; Lazzari, M.; Gianotti, V.; Laus, M.; Montanaro, L.; Malucelli, G. Relaxation Dynamics in Polyethylene Glycol/Modified Hydrotalcite Nanocomposites. Polymers 2018, 10, 1182
DS Minerva
RD 28 abr 2026