INFLUENCE OF PHASE STRUCTURE POLYMERIC FILMFORMER ON PHYSICAL MECHANICAL AND WATER RESISTANT PROPERTIES OF COATINGS

2021 ◽  
pp. 87-96
Author(s):  
V.A. Kuznetsova ◽  
◽  
E.V. Kurshev ◽  
A.A. Silaeva ◽  
S.A. Marchenko ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Phase Structure ◽  
Water Resistance ◽  
Polymeric System ◽  
Properties Of Coatings ◽  
Organic Silicon ◽  
Curing Agents ◽  
Modified Epoxy

The phase structure, adhesion and physical mechanical properties, water resistance of varnish coatings on the basis of the modified and not modified epoxy filmformers, with organic silicon ammine «AСOT-2» and low-molecular «ПO-200» polyamide as curing agents. It is established that the process of structurization of unfilled epoxy compositions depends on each component of polymeric system. The received results of determination of adhesion, physical mechanical properties, water resistance correlate with results of researches of phase structure of the coatings received on the basis of modified and not modified epoxy compositions, with organic silicon ammine «AСOT-2» and low-molecular «ПO-200» polyamide as curing agents.

INFLUENCE OF STRUCTURE OF POLYMERIC MATRIX ON STRUCTURE AND PROPERTY PRIMING COVERINGS

2021 ◽  
pp. 50-58
Author(s):  
V.A. Kuznetsova ◽  
◽  
V.G. Zheleznyak ◽  
S.L. Lonskii ◽  
N.A. Kovrizhkina ◽  
...  
Keyword(s):  
Water Absorption ◽  
Epoxy Resin ◽  
Phase Structure ◽  
Water Resistance ◽  
High Water ◽  
Physicomechanical Properties ◽  
Structure And Property ◽  
Organic Silicon ◽  
To Receive ◽  
Kinetics Of

Adhesion, physicomechanical properties, and also kinetics of water absorption of priming coatings on basis the E-41 epoxy resin modified by liquid Thiokol 1 and by Laproxide AF, and also their phase structure are investigated. As hardeners of primer compositions organic silicon ammine ASOT-2 and low-molecular polyamide PO-200 has been used. It is shown that use of the reactive modifier Laproxide AF and hardener ASOT-2 in the epoxy and thiokol film-formers allows to receive priming coating with uniform finely divided phase structure with low porosity and high water resistance.

Comparison of Microstructure and Mechanical Properties of Co-Based and Fe-Based Alloy Coatings Deposited by PTA

2013 ◽  
Vol 834-836 ◽  
pp. 617-622 ◽  
Author(s):  
Ming Lou ◽  
Yu Xiang Xu ◽  
Hong Wu Ouyang ◽  
Yong Du
Keyword(s):  
Mechanical Properties ◽  
Electron Probe ◽  
Optical Microscope ◽  
Properties Of Coatings ◽  
Composition Distribution ◽  
Stellite 6 ◽  
Plasma Transferred Arc ◽  
Scanning Electron Microcopy ◽  
Scanning Electron

Stellite 6 Co-based and Hӧganӓs Fe-based alloy coatings were deposited on austenitic engine valve using plasma transferred arc (PTA) hardfacing. The microstructures, composition distribution and mechanical properties of coatings were investigated by combining optical microscope (OM), scanning electron microcopy (SEM), field emission electron-probe analyzer (EPMA) and nanoindentation technique. The microstructures of hardfacing coatings consist of three phases which belong to hypoeutectic structure and Co-based coating has more uniformed and regularly changed microstructure. The determination of mechanical properties reveals that Co-based coating attains higher hardness value (~5.229 GPa), H/E (0.0265) and H3/E*2 (0.00323) than that of Fe-based coating, signified better wear resistance property.

Co-Continuous PPS/PA66 Composites - Part II: Mechanical Performance

2013 ◽  
Vol 804 ◽  
pp. 102-105
Author(s):  
Tao Yin ◽  
Yu Qi Gu ◽  
Chun Yu Yu ◽  
Zi Xin Li
Keyword(s):  
Mechanical Properties ◽  
Phase Structure ◽  
Mechanical Performance ◽  
Mechanical Analysis ◽  
Continuous Phase ◽  
Polyamide 66 ◽  
Screw Extruder ◽  
Wide Range ◽  
Twin Screw

Poly (phenylene sulfide) (PPS) was blended with polyamide 66 (PA66) in a wide range of compositions by using a co-rotating twin-screw extruder. Dynamic mechanical analysis was used in determination of the co-continuous phase. The results allowed to precisely detecting the range of co-continuity. In addition, the mechanical properties of PPS/PA66 composites can also be used to identify the dispersed/matrix phase or co-continuous phase structure.

Effects of Surface Contamination Layers and Roughness on the Determination of Mechanical Properties of Thin Films Using Nanoindentation

2011 ◽  
Author(s):  
Nicholaos G. Demas ◽  
Oyelayo O. Ajayi ◽  
Iqbal Shareef
Keyword(s):  
Thin Films ◽  
Mechanical Properties ◽  
Surface Roughness ◽  
Statistical Analysis ◽  
Surface Contamination ◽  
Properties Of Coatings ◽  
Simple Method ◽  
Nanomechanical Properties ◽  
Steel Substrates

Nanoindentation measurements on TiAlN, CrN, a-C:H:Me, and TiN, deposited on steel substrates have been performed. It was found that the resulting surface roughness/morphology after deposition significantly affects the measurements of nanomechanical properties, while measurements of these properties on the surface may be significantly different than the bulk portion of the coating, exhibiting a lower nanohardness due to the existence of a surface contamination layer. A simple method is proposed for accurately measuring the nanomechanical properties of coatings alleviating the need for excessive statistical analysis and the issues that arise from surface topography and the presence of surface and contamination layers on thin films.

The control and optimization of the curing process of epoxy coatings: a case of poly(glycidoxy siloxane) resins

2016 ◽  
Vol 36 (8) ◽  
pp. 819-827
Author(s):  
Tomasz Jeliński ◽  
Piotr Cysewski ◽  
Edwin Makarewicz
Keyword(s):  
Mechanical Properties ◽  
Degree Of Crystallinity ◽  
Curing Process ◽  
Technological Parameters ◽  
Properties Of Coatings ◽  
Important Indicator ◽  
Curing Conditions ◽  
Amine Curing Agent ◽  
Amine Curing

Abstract Coatings from poly(glycidoxy siloxane) resins were developed and their mechanical properties examined. Three different resins with varying numbers of methyl siloxane and glycidyl siloxane units were tested. Crystallinity was found to be a very important indicator of the mechanical properties of coatings, as the parameters such as cupping and hardness were linearly dependent on the degree of crystallinity of coatings. The method involving the spectrophotometric determination of unbounded amine curing agent was successfully applied as a way of optimizing the curing process both for expected mechanical properties and for ecological aspect. It was found that the resin with 50 methyl siloxane and 25 glycidyl siloxane units was the most appropriate for technological use because of the preferred mechanical properties and stability of technological parameters. Interestingly, this type of resin was characterized by the lowest degree of crystallinity. The curing conditions leading to the optimal product corresponded to 30 min of curing at 120°C or 20 min at 140°C. Under such conditions, the amount of released unbounded amine was the lowest. It was also found that poly(glycidoxy) siloxane resins may be ecologically valuable since the release of amine from this type of resins is smaller than that from a typical epoxy resin.

Determination of Hydroxy Groups in the Modified Epoxy Oligomers Using IR-Spectroscopy

2015 ◽  
Vol 9 (4) ◽  
pp. 411-416 ◽  
Author(s):  
Ostap Ivashkiv ◽  
◽  
Piotr Bruzdziak ◽  
Olena Shyshchak ◽  
Jacek Namiesnik ◽  
...  
Keyword(s):  
Ir Spectroscopy ◽  
Epoxy Oligomers ◽  
Hydroxy Groups ◽  
Modified Epoxy

Basic set of experiments for determination of mechanical properties of sand

2014 ◽  
Vol 62 (1) ◽  
pp. 129-137
Author(s):  
A. Sawicki ◽  
J. Mierczyński
Keyword(s):  
Mechanical Properties ◽  
Soil Mechanics ◽  
Physical And Mechanical Properties ◽  
Local Strain ◽  
Initial State ◽  
Laboratory Equipment ◽  
Additional Information ◽  
Basic Set ◽  
Initial Anisotropy

Abstract A basic set of experiments for the determination of mechanical properties of sands is described. This includes the determination of basic physical and mechanical properties, as conventionally applied in soil mechanics, as well as some additional experiments, which provide further information on mechanical properties of granular soils. These additional experiments allow for determination of steady state and instability lines, stress-strain relations for isotropic loading and pure shearing, and simple cyclic shearing tests. Unconventional oedometric experiments are also presented. Necessary laboratory equipment is described, which includes a triaxial apparatus equipped with local strain gauges, an oedometer capable of measuring lateral stresses and a simple cyclic shearing apparatus. The above experiments provide additional information on soil’s properties, which is useful in studying the following phenomena: pre-failure deformations of sand including cyclic loading compaction, pore-pressure generation and liquefaction, both static and caused by cyclic loadings, the effect of sand initial anisotropy and various instabilities. An important feature of the experiments described is that they make it possible to determine the initial state of sand, defined as either contractive or dilative. Experimental results for the “Gdynia” model sand are shown.

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