TY - JOUR
T1 - Effects of dispersion and interfacial modification on the macroscale properties of TiO2 polymer-matrix nanocomposites
AU - Hamming, Lesley M.
AU - Qiao, Rui
AU - Messersmith, Phillip B.
AU - Catherine Brinson, L.
N1 - Funding Information:
This research was supported by NIH (DE 018350) and NASA (BIMat URETI NCC-1–02037). LMH is supported by the National Science Foundation through a graduate research fellowship and by Northwestern University through a Presidential Fellowship. The SEM and TEM imaging was performed in the EPIC facility of the NUANCE Center that is supported by NSF-NSEC, NSF-MRSEC, Keck Foundation, the State of Illinois, and Northwestern University.
PY - 2009/9
Y1 - 2009/9
N2 - This paper quantifies how the quality of dispersion and the quality of the interfacial interaction between TiO2 nanoparticles and host polymer independently affect benchmark properties such as glass transition temperature (Tg), elastic modulus and loss modulus. By examining these composites with differential scanning calorimetry (DSC), dynamic mechanical analysis (DMA) and scanning electron microscopy (SEM), we demonstrate changes in properties depending on the adhesive/wetting or repulsive/dewetting interactions the nanoparticles have with the bulk polymer. We further quantify the dispersion of TiO2 nanoparticles in polymethylmethacrylate (PMMA) matrices by a digital-optical method and correlate those values to the degree of Tg depression compared to neat PMMA. Samples with the same weight percent of nanoparticles but better dispersion show larger shifts in Tg.
AB - This paper quantifies how the quality of dispersion and the quality of the interfacial interaction between TiO2 nanoparticles and host polymer independently affect benchmark properties such as glass transition temperature (Tg), elastic modulus and loss modulus. By examining these composites with differential scanning calorimetry (DSC), dynamic mechanical analysis (DMA) and scanning electron microscopy (SEM), we demonstrate changes in properties depending on the adhesive/wetting or repulsive/dewetting interactions the nanoparticles have with the bulk polymer. We further quantify the dispersion of TiO2 nanoparticles in polymethylmethacrylate (PMMA) matrices by a digital-optical method and correlate those values to the degree of Tg depression compared to neat PMMA. Samples with the same weight percent of nanoparticles but better dispersion show larger shifts in Tg.
KW - A. Nanocomposites
KW - A. Polymer-matrix composites (PMCs)
KW - B. Interphase
KW - B. Thermomechanical properties
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U2 - 10.1016/j.compscitech.2009.04.005
DO - 10.1016/j.compscitech.2009.04.005
M3 - Article
C2 - 20161273
AN - SCOPUS:67649099327
VL - 69
SP - 1880
EP - 1886
JO - Composites Science and Technology
JF - Composites Science and Technology
SN - 0266-3538
IS - 11-12
ER -