Determination of the Stresses and Properties of Polymer Coatings

Polymer coatings are widely used for effective vibration damping of sheet or hull structures of different engineering systems. The article presents a calculation and experimental technique that enables improved accuracy and validity of damping properties determination of polymer coatings. Mathematical models to determine the parameters of the experimental specimen having a homogenous strain state of the polymer coating are obtained. Experimentally confirmed that the use of coatings based on adhesive compositions such as "Sprut" increases by 18...28 times the damping capability in metal structures. An addition of fillers in adhesive compositions "Sprut" type in a proportion of 30...50% of its weight reduces by 2.4 times the damping properties of metal structures.

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Bestimmung der Haftzugfestigkeit dichter Beschichtungen / Determination of bond strength of impermeable polymer coatings

Restoration of Buildings and Monuments ◽

10.1515/rbm-1999-5390 ◽

1999 ◽

Vol 5 (4) ◽

pp. 387-398

Author(s):

R.M. Frey ◽

F.H. Wittmann

Keyword(s):

Bond Strength ◽

Polymer Coatings ◽

Theoretical Background ◽

Gas Pressure ◽

Blister Formation ◽

Controlled Conditions ◽

Porous Substrates

Abstract In many cases there is a risk for the formation of blisters if impermeable polymer coatings are applied on porous substrates. On covers of courses in sport stadiums formation of blisters has been observed recently. In this contribution a method is described which can be used to investigate the causes of blister formation in a given system. Blisters are artificially created by the application of a gas pressure in the interface between coating and substrate. In this way the growth of blisters can be varied under controlled conditions. The theoretical background of this method is outlined. In this way it is possible to estimate the necessary pressure under the cover to create blisters of the observed size.

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The Efficacy of Polymer Coatings for the Protection of Electroless Copper Plated Polyester Fabric

Polymers ◽

10.3390/polym12061277 ◽

2020 ◽

Vol 12 (6) ◽

pp. 1277 ◽

Cited By ~ 2

Author(s):

Alenka Ojstršek ◽

Natalija Virant ◽

Daryl Fox ◽

Latha Krishnan ◽

Andrew Cobley

Keyword(s):

Screen Printing ◽

Base Material ◽

Polyester Fabric ◽

Polymer Coatings ◽

Mechanical Characterisation ◽

Polyurethane Resin ◽

Colour Changes ◽

Acrylate Resin ◽

Photo Stability

The selective metallisation of textiles is becoming a very important process in the development of electronic or e-textiles. This study investigated the efficacy of polymer coatings for the protection of copper (Cu) conductive tracks electroless plated on polyester (PES) fabric against laundering and rubbing, without essentially affecting the physical-mechanical and optical properties of the base material. After the electroless deposition of a consistent layer of Cu onto PES, four polymers were applied individually by screen-printing or padding. The physical-mechanical characterisation of coated textiles revealed that polyurethane resin (PUR) and modified acrylate resin (AR) had little effect on the air permeability, tensile strength and breaking tenacity of the PES, as compared to silicone elastomer polydimethylsiloxane (PDMS) and epoxy resin (ER). On the other hand, PUR and PDMS had higher abrasion resistance and photo-stability under prolonged UV irradiation, as compared to AR and ER. In addition, freshly Cu plated samples were coated with polymers, washed up to 30 cycles and characterised by measuring their electrical resistivity, determination of colour changes and the examination of the surface morphology. Based on these results, PUR presented the most suitable protection of Cu tracks on PES, with the lowest impact on physical-mechanical properties. ER is not recommended to be used for protection of Cu tracks on fabrics, due to its rigidity, low photo-stability, washing and wear durability.

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Determination of the strength of the bond of polymer coatings with solid surfaces by the method of symmetric delamination

Mechanics of Composite Materials ◽

10.1007/bf00616071 ◽

1993 ◽

Vol 28 (6) ◽

pp. 528-532

Author(s):

V. I. Pavlov ◽

V. D. Galich ◽

R. A. Veselovskii

Keyword(s):

Polymer Coatings ◽

Solid Surfaces

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Effect determination of operating environments on growth of subfilm corrosion of machine parts with dispersion-filled polymer coatings

All the materials Encyclopedic Reference Book ◽

10.31044/1994-6260-2021-0-8-34-41 ◽

2021 ◽

Vol 0 (8) ◽

pp. 34-41

Author(s):

V. A. Gabysheva ◽

◽

N. I. Baurova ◽

Keyword(s):

Growth Rate ◽

Polymer Coating ◽

Polymer Coatings ◽

Detection Methods ◽

Good Adhesion ◽

Organosilicon Polymer ◽

Operating Environments ◽

Study Results ◽

Machine Parts

Detection methods of subfilm corrosion as well as the effect of operating environments on the corrosion growth rate have been examined. The study results of the effect of operating environments on parts with organosilicon polymer coatings modified with various dispersed fillers are presented. It is shown that the addition of mica into the composition of an organosilicon coating make possible to have a protective anticorrosion coating with good adhesion to the metal surface. The effect of operating environments on wettability of the polymer coating surface is described.

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Gas Chromatographic/Mass Spectrometric Determination of Benzene in Nonstick Cookware and Microwave Susceptors and Its Migration into Foods on Cooking

Journal of AOAC International ◽

10.1093/jaoac/76.4.760 ◽

1993 ◽

Vol 76 (4) ◽

pp. 760-764 ◽

Cited By ~ 4

Author(s):

Sue M Jickells ◽

Mark R Philo ◽

John Gilbert ◽

Laurence Castle

Keyword(s):

Mass Spectrometry ◽

Gas Chromatography ◽

Limit Of Detection ◽

Polymer Coatings ◽

Mass Spectrometric ◽

Gas Chromatography Mass Spectrometry ◽

Static Headspace ◽

Headspace Gc ◽

Chromatographic Mass

Abstract Benzene in poly(tetrafluoroethylene) (PTFE) coatings of nonstick cookware was determined by heating a small amount of coating in a sealed vial. Gas chromatography/mass spectrometry (GC/MS) was used to analyze the vial headspace for benzene. A small survey (26 samples) of retail nonstick cookware detected benzene ranging from 2 to 50 μg/dm2 in 7 samples. Nonstick frying pans with various polymer coatings were obtained directly from 1 manufacturer. Benzene (6–30 μg/dm2) was detected in a number of these samples and was attributed to the use of a phenylmethyl silicone ingredient that contained benzene at 360 mg/kg. To determine the possible transfer of benzene from these coatings during normal use, several foods (puddings, cakes, and roast potatoes) were prepared in previously unused cookware. The foods were analyzed by using static headspace GC/MS. Benzene was not detected in any of these foods at a limit of detection of 2 μg/kg. In related studies, the determination of benzene release from microwave susceptors was performed by heating the materials in a sealed system at 190PC for 4 min. Benzene release above 1 μg/dm2 was not detected in 24 samples of susceptors. However, 1 specially supplied sample of nonmetallized susceptor released 10 μg/dm2 benzene when heated above normal anticipated temperatures of usage (to 220°C). Foods such as french fries and pizza when cooked according to the manufacturer’s instructions in susceptors contained no benzene with a limit of detection of 2 μg/kg. Even under abuse conditions of susceptors, the transfer of benzene to foods remained below this limit.

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Selective enrichment and determination of nicosulfuron in water and soil by a stir bar based on molecularly imprinted polymer coatings

Analytica Chimica Acta ◽

10.1016/j.aca.2010.04.041 ◽

2010 ◽

Vol 670 (1-2) ◽

pp. 72-77 ◽

Cited By ~ 33

Author(s):

Lieqing Yang ◽

Xiaomin Zhao ◽

Jie Zhou

Keyword(s):

Molecularly Imprinted Polymer ◽

Polymer Coatings ◽

Imprinted Polymer ◽

Molecularly Imprinted ◽

Selective Enrichment

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MACHINE SHAFTS RECOVERY BY COMBINING ELECTROMECHANICAL PROCESSING WITH THE USE OF POLYMER MATERIALS

Tekhnicheskiy servis mashin ◽

10.22314/2618-8287-2021-59-3-130-137 ◽

2021 ◽

Vol 3 (144) ◽

pp. 130-137

Author(s):

Andrey V. Konakov ◽

◽

Aleksandr V. Kotin

Keyword(s):

Technological Process ◽

Polymer Coatings ◽

Polymer Materials ◽

Research Purpose ◽

Multilayer Coatings ◽

Rolling Bearings ◽

Technological Processes ◽

Combined Coatings ◽

Contact Pressures

Currently, one of the most acute problems of repair production is the lack of highly efficient, but at the same time easy-to-implement technological processes for restoring the landing surfaces of shafts and axles of machine mechanisms. The solution to this problem is in the combination of simple and inexpensive technological processes with the production of multilayer coatings with specified guaranteed physical, mechanical, rheological and tribotechnical properties, as well as in ensuring the necessary dimensional and geometric accuracy of the restored joints of parts. (Research purpose) The research purpose is in developing a typical technological process for restoring the landing surfaces of the shafts of machine mechanisms for rolling bearings by combining electromechanical processing with the application of polymer coatings. (Materials and мethods) The article presents the studies of the physical, mechanical and rheological properties of polymer materials and combined coatings on the AI-7000M breaking machine of GOTECH Testing Machines Inc. The UGN60R software package was used to process the obtained results. (Results and discussion) The article presents a mathematical model that allows us to describe the process of loading the combined coating of a worn part with the determination of its stress-strain state at the installation stage and during operation of the restored fixed joint. As a result, the load affects the change in contact pressures to a greater extent, and the volume modulus and the shear modulus of the polymer to a lesser extent. (Conclusions) A new standard technological process has been developed and tested for restoring worn-out landing surfaces of shafts for rolling bearings of transmission units of domestic and foreign tractors, cars, agricultural machinery, equipment of processing industries by combining electromechanical processing with a coating based on polymer compositions ANATERM-201 and Loctite 3472.

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