Thermal Stability of Stearic AcidBarium Stearate Langmuir−Blodgett Monolayers on Plasma-Oxidized Silicon Substrate Probed by Atomic Force Microscopy

1999 ◽  
Vol 103 (22) ◽  
pp. 4687-4692 ◽  
Author(s):  
C. Consalvo ◽  
S. Panebianco ◽  
B. Pignataro ◽  
G. Compagnini ◽  
O. Puglisi
Keyword(s):  
Thermal Stability ◽  
Atomic Force Microscopy ◽  
Silicon Substrate ◽  
Force Microscopy ◽  
Langmuir Blodgett ◽  
Atomic Force ◽  
Thermal Stability Of

scholarly journals Effect of Modification with Various Epoxide Compounds on Mechanical, Thermal, and Coating Properties of Epoxy Resin

2016 ◽  
Vol 2016 ◽  
pp. 1-13 ◽  
Author(s):  
Alaaddin Cerit ◽  
Mustafa Esen Marti ◽  
Ulku Soydal ◽  
Suheyla Kocaman ◽  
Gulnare Ahmetli
Keyword(s):  
Thermal Stability ◽  
Atomic Force Microscopy ◽  
Tensile Strength ◽  
Epoxy Resin ◽  
Curing Process ◽  
Coating Properties ◽  
Corrosive Media ◽  
Force Microscopy ◽  
Atomic Force ◽  
Thermal Stability Of

Epoxy resin (ER) was modified with four different epoxide compounds, 4,5-epoxy-4-methyl-pentane-2-on (EMP), 3-phenyl-1,2-epoxypropane (PhEP), 1-chloro-2,3-epoxy-5-(chloromethyl)-5-hexene (CEH), and a fatty acid glycidyl ester (FAGE), to improve its chemical and physical properties. The effects of the addition and amount of these modifiers on mechanical, thermal, and coating properties were investigated. Atomic force microscopy was used to observe the changes obtained with the modification. The influence of the modifying agents on the curing process was monitored through FTIR spectroscopy. The curing degrees of ER and modified ERs (M-ERs) were found to be over 91%. The results showed that tensile strength of ER improved till 30% (wt.) with addition of the modifier content. Modification with EMP and PhEP remarkably enhanced the thermal stability of ER to be highly resistant to the corrosive media.

Preparation, thermal conductivity, and thermal stability of flame retardant polyethylene with exfoliated MoS2/MxOy

2017 ◽  
Vol 41 (22) ◽  
pp. 13287-13292 ◽  
Author(s):  
Karolina Wenelska ◽  
Ewa Mijowska
Keyword(s):  
Electron Microscopy ◽  
Thermal Conductivity ◽  
Thermal Stability ◽  
Transmission Electron Microscopy ◽  
Raman Spectroscopy ◽  
Atomic Force Microscopy ◽  
Force Microscopy ◽  
Atomic Force ◽  
Transmission Electron ◽  
Thermal Stability Of

In this work, exfoliated molybdenum disulfide (MoS2) modified by a metal oxide (MoS2/MxOy) was prepared by a hydrothermal method and characterized by atomic force microscopy (AFM), Raman spectroscopy and transmission electron microscopy (TEM).

Phase Transitions in Phospholipid Monolayers Studied by Atomic Force Microscopy and Langmuir-Blodgett Technique

2008 ◽  
Vol 59 (11) ◽  
Author(s):  
Maria Tomoaia-Cotisel ◽  
Aurora Mocanu
Keyword(s):  
Atomic Force Microscopy ◽  
Lipid Membrane ◽  
Phase Behaviour ◽  
Membrane Interface ◽  
Force Microscopy ◽  
Langmuir Blodgett ◽  
Atomic Force ◽  
Phospholipid Monolayers ◽  
Air Water Interface ◽  
Condensed Liquid

The phase behaviour and surface structure of dipalmitoyl phosphatidyl choline (DPPC) monolayers at the air/water interface, in the absence and the presence of procaine, have been investigated by Langmuir-Blodgett (LB) technique and atomic force microscopy. The LB films were transferred on mica, at a controlled surface pressure, characteristic for the expanded liquid to condensed liquid phase transition of pure DPPC monolayers. The results indicate that procaine penetrates into and specifically interacts with phospholipid monolayers stabilizing the lipid membrane interface.

Influence of trisilanol isooctyl POSS content on the structure, morphology and rheological properties of thermoplastic polyurethane (TPU)

2020 ◽  
Vol 40 (9) ◽  
pp. 727-735
Author(s):  
Rudinei Fiorio ◽  
Chaitanya Danda ◽  
João Maia
Keyword(s):  
Thermal Stability ◽  
Rheological Properties ◽  
Thermoplastic Polyurethane ◽  
Reactive Extrusion ◽  
Strain Rates ◽  
Force Microscopy ◽  
Atomic Force ◽  
Extensional Strain ◽  
Oligomeric Silsesquioxane ◽  
Thermal Stability Of

AbstractIn this study, thermoplastic polyurethanes (TPUs) containing trisilanol isooctyl polyhedral oligomeric silsesquioxane (POSS), a reactive nanofiller, were synthesized and characterized rheologically and morphologically, and the effects of POSS content on the melt thermal stability of the TPUs are investigated. Samples containing 0, 0.23, 0.57, 1.14, and 2.23% (w/w) POSS were synthesized by reactive extrusion and characterized by Fourier transform infrared spectroscopy (FTIR), oscillatory and extensional rheometry, atomic force microscopy (AFM), and small- and wide-angle X-ray scattering (SAXS and WAXS, respectively). The rheological properties of molten TPU are time-dependent and the melt thermal stability of the TPU is maximal at 1.14% of POSS. The addition of 0.23 and 0.57% POSS promotes strain-hardening at low extensional strain rates (0.01 and 0.10 s−1), not affecting the extensional characteristics at higher strain rates. The addition of increasing amounts of POSS leads to the formation of POSS-rich clusters well dispersed in the TPU matrix. SAXS and WAXS results show that the POSS domains are amorphous and that POSS does not modify the crystalline structure of TPU. Therefore, this work indicates that synthesizing TPU in the presence of trisilanol isooctyl POSS can increase the melt thermal stability of the polymer, facilitating its processing.

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