Journal: Polymers

Article Title: Indentation Size Effect in Pressure-Sensitive Polymer Based on A Criterion for Description of Yield Differential Effects and Shear Transformation-Mediated Plasticity

doi: 10.3390/polym11030412

Figure Lengend Snippet: Force-displacement curves and schematic of poly(methyl methacrylate) (PMMA) specimens used in quasi-static loading.

Article Snippet: Commercial grade of the material was purchased from Degussa AG Plexiglas ® PMMA (Shanghai, China).

Techniques:

Journal: Polymers

Article Title: Indentation Size Effect in Pressure-Sensitive Polymer Based on A Criterion for Description of Yield Differential Effects and Shear Transformation-Mediated Plasticity

doi: 10.3390/polym11030412

Figure Lengend Snippet: Stress components and invariants of PMMA under different loading conditions at yielding.

Article Snippet: Commercial grade of the material was purchased from Degussa AG Plexiglas ® PMMA (Shanghai, China).

Techniques: Shear

Journal: Polymers

Article Title: Indentation Size Effect in Pressure-Sensitive Polymer Based on A Criterion for Description of Yield Differential Effects and Shear Transformation-Mediated Plasticity

doi: 10.3390/polym11030412

Figure Lengend Snippet: Comparison of experimental yield loci and theoretical models of PMMA in shear–normal stress space.

Article Snippet: Commercial grade of the material was purchased from Degussa AG Plexiglas ® PMMA (Shanghai, China).

Techniques: Comparison, Shear

Journal: Polymers

Article Title: Indentation Size Effect in Pressure-Sensitive Polymer Based on A Criterion for Description of Yield Differential Effects and Shear Transformation-Mediated Plasticity

doi: 10.3390/polym11030412

Figure Lengend Snippet: Variation of the indentation strain rate vs depth of PMMA at different indentation strain rates.

Article Snippet: Commercial grade of the material was purchased from Degussa AG Plexiglas ® PMMA (Shanghai, China).

Techniques:

Journal: Scientific Reports

Article Title: Investigation of the molecular switching process between spin crossover states of triazole complexes as basis for optical sensing applications

doi: 10.1038/s41598-024-56427-1

Figure Lengend Snippet: Schemes of the fabrication processes used for realizing the required optical waveguides. ( a ) An hot embossing process was employed to create multi-mode waveguides. Hereby (1) a PMMA foil (Plexiglas XT 99524, ThyssenKrupp, Germany) was placed between a stamp containing the master structure and a planar holder. (2) Applying a temperature slightly above the glass temperature of PMMA ( \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$T_g\approx 120$$\end{document} T g ≈ 120 ∘ C) and a pressure of \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\approx 35$$\end{document} ≈ 35 bar transferred the structure from the master stamp to the PMMA foil. (3) After the sample cooled down close to room temperature, the pressure was reduced and the sample containing the negative of the master structure was removed. In a final step, the fabricated channel in the PMMA was filled (4) with an epoxy resin (NOA68) mixed with the molecular switches or (5) filled with an epoxy on top of which the molecular switches were applied after the curing process, respectively. ( b ) To investigate single mode structures, SWWs were used. (1) Therefore, an epoxy was applied in between two aligned single mode fibers with a small gap. (2) Subsequently, light with an UV-near wavelength ( \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\lambda =406$$\end{document} λ = 406 nm) was illuminated through one fiber starting the curing process of the epoxy locally at the end of the fiber. This, again, increases the refractive index locally, which traps the light and creates a straight waveguide. (3) Finally, the surrounding resin can be cured with UV-flood exposure if the epoxy was already mixed with molecular switches to achieve a distribution of the particle inside the core. (4) Alternatively, the residual resin can be removed using isopropanol enabling free access to the core.

Article Snippet: Hereby (1) a PMMA foil (Plexiglas XT 99524, ThyssenKrupp, Germany) was placed between a stamp containing the master structure and a planar holder. (2) Applying a temperature slightly above the glass temperature of PMMA ( \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$T_g\approx 120$$\end{document} T g ≈ 120 ∘ C) and a pressure of \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\approx 35$$\end{document} ≈ 35 bar transferred the structure from the master stamp to the PMMA foil. (3) After the sample cooled down close to room temperature, the pressure was reduced and the sample containing the negative of the master structure was removed.

Techniques: Refractive Index