Effects of dispersion and interfacial modification on the macroscale properties of TiO(2) polymer matrix nanocomposites.

Effects of dispersion and interfacial modification on the macroscale properties of TiO(2) polymer matrix nanocomposites.
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DOI:
10.1016/j.compscitech.2009.04.005
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发表时间:
2009-09-01
影响因子:
9.1
通讯作者:
Brinson, L. Catherine
Brinson, L. Catherine
中科院分区:
材料科学1区
文献类型:
--
作者:
Hamming, Lesley M.;Qiao, Rui;Messersmith, Phillip B.;Brinson, L. Catherine

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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 were able to demonstrate changes in properties depending on the adhesive/wetting or repulsive/dewetting interactions the nanoparticles have with the bulk polymer. We further quantified the dispersion of TiO2 nanoparticles in polymethylmethacrylate (PMMA) matrices by a digital-optical method and correlated those values to the degree of Tg depression compared to neat PMMA. Samples with the same weight percent of nanoparticles but better dispersion showed larger shifts in Tg.
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影响因子: 3.5
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