Nanocomposite Derived from Core-Shell Nanoparticles via Creep Deformation of an Amorphous Silica Layer Below its Glass Transition Temperature

2013 ◽  
Vol 96 (2) ◽  
pp. 429-435
Author(s):  
Yoshiaki Kinemuchi ◽  
Atsuya Towata ◽  
Masaki Yasuoka
Keyword(s):  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Creep Deformation ◽  
Amorphous Silica ◽  
Core Shell ◽  
Silica Layer ◽  
Shell Nanoparticles ◽  
Core Shell Nanoparticles

scholarly journals Shell Architecture Strongly Influences the Glass Transition, Surface Mobility, and Elasticity of Polymer Core-Shell Nanoparticles

2019 ◽  
Vol 52 (14) ◽  
pp. 5399-5406 ◽  
Author(s):  
Eunsoo Kang ◽  
Bartlomiej Graczykowski ◽  
Ulrich Jonas ◽  
Dane Christie ◽  
Laura A. G. Gray ◽  
...  
Keyword(s):  
Glass Transition ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Surface Mobility ◽  
Transition Surface ◽  
Core Shell Nanoparticles

Silica-Polymer Core-Shell Particles for Fabrication of Poly(methyl methacrylate) Composite Materials

2012 ◽  
Vol 531 ◽  
pp. 153-156
Author(s):  
Ren Gui Peng ◽  
Cheng En He ◽  
Wei Tang ◽  
Yue E Liu ◽  
Ying Kui Yang
Keyword(s):  
Glass Transition ◽  
Transition Temperature ◽  
Composite Materials ◽  
Glass Transition Temperature ◽  
Methyl Methacrylate ◽  
Interfacial Adhesion ◽  
Core Shell ◽  
Poly Methyl Methacrylate ◽  
The Matrix ◽  
Shell Particles

Poly(n-butyl acrylate) grafted silica nanoparticles were compounded with poly(methyl methacrylate) to yield silica/polymer composites with the improved dispersion of silica and interfacial adhesion with the matrix, thus showing increases in storage modulus and glass transition temperature.

scholarly journals Glass Transition Temperature and Microhardness of Compatible and Incompatible Elastomer/Plastomer Blends

1970 ◽  
Vol 33 (1) ◽  
pp. 15-24 ◽  
Author(s):  
MF Mina ◽  
GH Michler ◽  
FJ Balta Calleja
Keyword(s):  
Differential Scanning Calorimetry ◽  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Natural Rubber ◽  
Methyl Methacrylate ◽  
Core Shell ◽  
Scanning Calorimetry ◽  
Rubber Toughened ◽  
Shell Particles

Glass transition temperature (Tg) of core-shell particles-toughened poly(methyl- methacrylate) (CSPTPMMA) and natural rubber-toughened PMMA (NRTPMMA), which are basically the PMMA/elastomer blends with different concentrations of elastomer heterogeneously distributed in the samples, was investigated by means of differential scanning calorimetry (DSC), dynamic mechanical analysis (DMA) and microindentation technique (MT). Microhardness (H) of the samples was measured using MT. Core-shell particles (CSP) with a rubbery shell and natural rubber (NR) were used as reinforcing materials for the production of compatible and incompatible blends, respectively. Results reveal a good correlation of the glass transition temperature (Tg) obtained from DSC and DMA, and that deduced from MT.  The H-value of each sample is compared with its Tg-value. Increase of Tg with the increase of H, which is a general behavior of polymers, is not maintained in the both blends investigated. Contrary to expectation, H is shown to decrease with increasing glass transition temperature in case of CSP-toughened compatible blends while it decreases with the decrease of Tg-value only in case of NR-modified incompatible blends for lower NR concentration (<1 wt%) and does not depend on Tg for rubber content higher than 1 wt%.  Keywords: Glass transition temperature, microhardness, rubber-toughened poly(methyl -methacrylate), core-shell particle, differential scanning calorimetry DOI: 10.3329/jbas.v33i1.2946 Journal of Bangladesh Academy of Sciences, Vol. 33, No. 1, 15-24, 2009

Sintering of core–shell Ag/glass nanoparticles: metal percolation at the glass transition temperature yields metal/glass/ceramic composites

2010 ◽  
Vol 20 (36) ◽  
pp. 7769 ◽  
Author(s):  
Aline C. C. Rotzetter ◽  
Norman A. Luechinger ◽  
Evagelos K. Athanassiou ◽  
Dirk Mohn ◽  
Fabian M. Koehler ◽  
...  
Keyword(s):  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Glass Ceramic ◽  
Ceramic Composites ◽  
Core Shell

scholarly journals On Structural Rearrangements Near The Glass Transition Temperature in Amorphous Silica

Materials ◽  
2021 ◽  
Vol 14 (18) ◽  
pp. 5235
Author(s):  
Michael I. Ojovan ◽  
Robert F. Tournier
Keyword(s):  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Liquid Phase ◽  
Amorphous Silica ◽  
Percolation Theory ◽  
Second Order ◽  
Structural Rearrangements ◽  
Liquid Transition ◽  
Percolating Network

The formation of clusters was analyzed in a topologically disordered network of bonds of amorphous silica (SiO2) based on the Angell model of broken bonds termed configurons. It was shown that a fractal-dimensional configuron phase was formed in the amorphous silica above the glass transition temperature Tg. The glass transition was described in terms of the concepts of configuron percolation theory (CPT) using the Kantor-Webman theorem, which states that the rigidity threshold of an elastic percolating network is identical to the percolation threshold. The account of configuron phase formation above Tg showed that (i) the glass transition was similar in nature to the second-order phase transformations within the Ehrenfest classification and that (ii) although being reversible, it occurred differently when heating through the glass–liquid transition to that when cooling down in the liquid phase via vitrification. In contrast to typical second-order transformations, such as the formation of ferromagnetic or superconducting phases when the more ordered phase is located below the transition threshold, the configuron phase was located above it.

Mesoporous multi-silica layer-coated Y2O3:Eu core-shell nanoparticles: Synthesis, luminescent properties and cytotoxicity evaluation

2019 ◽  
Vol 96 ◽  
pp. 365-373 ◽  
Author(s):  
Anees A. Ansari ◽  
Aslam Khan ◽  
Joselito P. Labis ◽  
Manawwer Alam ◽  
M. Aslam Manthrammel ◽  
...  
Keyword(s):  
Luminescent Properties ◽  
Core Shell ◽  
Silica Layer ◽  
Shell Nanoparticles ◽  
Nanoparticles Synthesis ◽  
Core Shell Nanoparticles

Creep Deformation of Zr55Co25Al15Ni5 Bulk Metallic Glass Near Glass Transition Temperature: A Nanoindentation Study

2021 ◽  
Author(s):  
Agus Dwi Anggono ◽  
Marischa Elveny ◽  
Walid Kamal Abdelbasset ◽  
Aleksandr Mikhailovich Petrov ◽  
Kirill Aleksandrovich Ershov ◽  
...  
Keyword(s):  
Glass Transition ◽  
Transition Temperature ◽  
Glass Transition Temperature ◽  
Metallic Glass ◽  
Bulk Metallic Glass ◽  
Creep Deformation
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