scholarly journals Correction: Foroozani Behbahani, A.; Harmandaris, V. Gradient of Segmental Dynamics in Stereoregular Poly(methyl methacrylate) Melts Confined between Pristine or Oxidized Graphene Sheets. Polymers 2021, 13, 830

Polymers ◽  
2021 ◽  
Vol 14 (1) ◽  
pp. 106
Author(s):  
Alireza Foroozani Behbahani ◽  
Vagelis Harmandaris
Keyword(s):  
Methyl Methacrylate ◽  
Graphene Sheets ◽  
Segmental Dynamics ◽  
Poly Methyl Methacrylate

The authors wish to make the following corrections to this paper: [...]

Investigating the effect of nanolayered silicates on blend segmental dynamics and minor component relaxation behavior in poly(ethylene oxide)/poly(methyl methacrylate) miscible blends

2010 ◽  
Vol 49 (4) ◽  
pp. 318-326 ◽  
Author(s):  
Kazem Jeddi ◽  
Nader Taheri Qazvini ◽  
Seyed Hassan Jafari ◽  
Hossein Ali Khonakdar ◽  
Javad Seyfi ◽  
...  
Keyword(s):  
Ethylene Oxide ◽  
Methyl Methacrylate ◽  
Minor Component ◽  
Relaxation Behavior ◽  
Segmental Dynamics ◽  
Poly Methyl Methacrylate ◽  
Miscible Blends ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene

Rapid Poly(ethylene oxide) Segmental Dynamics in Blends with Poly(methyl methacrylate)

2003 ◽  
Vol 36 (5) ◽  
pp. 1724-1730 ◽  
Author(s):  
T. R. Lutz ◽  
Yiyong He ◽  
M. D. Ediger ◽  
Haihui Cao ◽  
Guoxing Lin ◽  
...  
Keyword(s):  
Ethylene Oxide ◽  
Methyl Methacrylate ◽  
Segmental Dynamics ◽  
Poly Methyl Methacrylate ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene

Dielectric and thermal studies of the segmental dynamics of poly(methyl methacrylate)/silica nanocomposites prepared by the sol-gel method

2012 ◽  
Vol 128 (6) ◽  
pp. 3771-3781 ◽  
Author(s):  
Konstantinos Kyriakos ◽  
Konstantinos N. Raftopoulos ◽  
Polycarpos Pissis ◽  
Apostolos Kyritsis ◽  
Franziskus Näther ◽  
...  
Keyword(s):  
Methyl Methacrylate ◽  
Sol Gel ◽  
Thermal Studies ◽  
Segmental Dynamics ◽  
Gel Method ◽  
Sol Gel Method ◽  
Poly Methyl Methacrylate ◽  
Silica Nanocomposites

Depth profile of the segmental dynamics at a poly(methyl methacrylate) film surface

Soft Matter ◽  
2013 ◽  
Vol 9 (39) ◽  
pp. 9376 ◽  
Author(s):  
Biao Zuo ◽  
Yingjun Liu ◽  
Lin Wang ◽  
Yumei Zhu ◽  
Yifan Wang ◽  
...  
Keyword(s):  
Methyl Methacrylate ◽  
Depth Profile ◽  
Film Surface ◽  
Segmental Dynamics ◽  
Poly Methyl Methacrylate

Composition Dependence of Segmental Dynamics of Poly(methyl methacrylate) in Miscible Blends with Poly(ethylene oxide)

2006 ◽  
Vol 39 (8) ◽  
pp. 2866-2874 ◽  
Author(s):  
Jiahong Liu ◽  
Victoria García Sakai ◽  
Janna K. Maranas
Keyword(s):  
Ethylene Oxide ◽  
Methyl Methacrylate ◽  
Composition Dependence ◽  
Segmental Dynamics ◽  
Poly Methyl Methacrylate ◽  
Miscible Blends ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene

scholarly journals Gradient of Segmental Dynamics in Stereoregular Poly(Methyl Methacrylate) Melts Confined between Pristine or Oxidized Graphene Sheets

Polymers ◽  
2021 ◽  
Vol 13 (5) ◽  
pp. 830
Author(s):  
Alireza Foroozani Behbahani ◽  
Vagelis Harmandaris
Keyword(s):  
Graphene Oxide ◽  
Dielectric Loss ◽  
Methyl Methacrylate ◽  
Temperature Dependence ◽  
Superposition Principle ◽  
Polymer Surface ◽  
Relaxation Times ◽  
Pristine Graphene ◽  
Segmental Dynamics ◽  
Poly Methyl Methacrylate

Segmental dynamics in unentangled isotactic, syndiotactic, and atactic poly(methyl methacrylate) (i-, a-, and s-PMMA) melts confined between pristine graphene, reduced graphene oxide, RGO, or graphene oxide, GO, sheets is studied at various temperatures, well above glass transition temperature, via atomistic molecular dynamics simulations. The model RGO and GO sheets have different degrees of oxidization. The segmental dynamics is studied through the analysis of backbone torsional motions. In the vicinity of the model nanosheets (distances less than ≈2 nm), the dynamics slows down; the effect becomes significantly stronger with increasing the concentration of the surface functional groups, and hence increasing polymer/surface specific interactions. Upon decreasing temperature, the ratios of the interfacial segmental relaxation times to the respective bulk relaxation times increase, revealing the stronger temperature dependence of the interfacial segmental dynamics relative to the bulk dynamics. This heterogeneity in temperature dependence leads to the shortcoming of the time-temperature superposition principle for describing the segmental dynamics of the model confined melts. The alteration of the segmental dynamics at different distances, d, from the surfaces is described by a temperature shift, ΔTseg(d) (roughly speaking, shift of a characteristic temperature). Next, to a given nanosheet, i-PMMA has a larger value of ΔTseg than a-PMMA and s-PMMA. This trend correlates with the better interfacial packing and longer trains of i-PMMA chains. The backbone torsional autocorrelation functions are shown in the frequency domain and are qualitatively compared to the experimental dielectric loss spectra for the segmental α-relaxation in polymer nanocomposites. The εT″(f) (analogous of dielectric loss, ε″(f), for torsional motion) curves of the model confined melts are broader (toward lower frequencies) and have lower amplitudes relative to the corresponding bulk curves; however, the peak frequencies of the εT″(f) curves are only slightly affected.

Sign in / Sign up

Export Citation Format

Share Document