Dynamic mechanical analysis in coatings industry

Schlesing, W.; Buhk, M.; Osterhold, M.

doi:10.1016/j.porgcoat.2003.09.009

Cited by 81 publications

(34 citation statements)

References 7 publications

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“…20 The effect of curing temperature was also investigated in a recent study using PU varnish cured at 20, 70 and 110uC. 21 The results in that work revealed that elevated curing temperature up to 110uC can improve dc resistance of coatings by about two orders of magnitude, and this remained consistent for the duration of experiment. The improved performance of the coating was attributed to higher crosslinking density and uniformity of chemical structure as revealed by thermomechanical characterisation.…”

Section: Effect Of Curing Temperaturementioning

confidence: 97%

Studying inhomogeneity of organic coatings using wire beam multielectrode and physicomechanical testing

Jamali

Mills

2013

Corrosion Engineering, Science and Technology

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The effect of thickness, curing temperature and solvent on the structural inhomogeneity of several types of organic coatings has been investigated. The local distribution of electrochemical resistance was studied using a wire beam multielectrode array, while the inhomogeneity at a larger scale was examined using ,3 cm 2 area detached coatings. Physicomechanical tests were also employed to address the structural changes occurring because of variation in curing temperature and the type (or absence) of solvent. Results acquired by wire beam electrode and from the detached coatings showed that increasing the thickness and curing temperature improves the homogeneity of the coating as does elimination of solvent. Waterborne coatings exhibited a relatively homogeneous low resistance with a resistance lower than the threshold required for effective corrosion protection. Results of physicomechanical examination suggest that unreacted functional groups and water absorption are of the main causes of formation of structural defects in organic coatings.

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Section: Effect Of Curing Temperaturementioning

confidence: 97%

Studying inhomogeneity of organic coatings using wire beam multielectrode and physicomechanical testing

Jamali

Mills

2013

Corrosion Engineering, Science and Technology

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“…Additionally, Dynamic Mechanical Thermal Analysis (DMTA) is a standard technique used by industry (and less so in academia) to measure the change in viscoelasticity of polymeric materials during structural relaxation events. [5][6][7] Since DMTA principally measures the stiffness (energy storage) and molecular mobility (energy dissipation), it provides arguably the most sensitive technique for GT measurements. However, to date extensive DMTA studies are still rare in the examination of biopolymer structural transitions at levels of sufficient detail to truly elucidate underlying structureproperty relations.…”

Section: Introductionmentioning

confidence: 99%

Glass transitions in native silk fibres studied by dynamic mechanical thermal analysis

et al. 2016

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Silks are a family of semi-crystalline structural materials, spun naturally by insects, spiders and even crustaceans. Compared to the characteristic β-sheet crystalline structure in silks, the non-crystalline structure and its composition deserves more attention as it is equally critical to the filaments' high toughness and strength. Here we further unravel the structure-property relationship in silks using Dynamic Mechanical Thermal Analysis (DMTA). This technique allows us to examine the most important structural relaxation event of the disordered structure the disordered structure, the glass transition (GT), in native silk fibres of the lepidopteran Bombyx mori and Antheraea pernyi and the spider Nephila edulis. The measured glass transition temperature Tg, loss tangent tan δ and dynamic storage modulus are quantitatively modelled based on Group Interaction Modelling (GIM). The "variability" issue in native silks can be conveniently explained by the different degrees of structural disorder as revealed by DMTA. The new insights will facilitate a more comprehensive understanding of the structure-property relations for a wide range of biopolymers.

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“…Rheological properties 35,113,131,134,188,208,265,[406][407][408][409][410][411][412][413][414][415][416][417][418][419] changes during weathering have been studied. Most studies are limited to a determination of the viscosity of a solution of the initial and the degraded samples.…”

Section: Rheological Properties Of Materialsmentioning

confidence: 99%

“…At the same time, peak height decreases. 418 A new technique was developed in which photorheometer is used for in situ studies of degradation of dienic elastomers. This is inferred from E min measurements.…”

Section: Rheological Properties Of Materialsmentioning

confidence: 99%

Testing Methods of Weathered Specimen

Wypych¹

2013

Handbook of Material Weathering

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Dynamic mechanical analysis in coatings industry

Cited by 81 publications

References 7 publications

Studying inhomogeneity of organic coatings using wire beam multielectrode and physicomechanical testing

Studying inhomogeneity of organic coatings using wire beam multielectrode and physicomechanical testing

Glass transitions in native silk fibres studied by dynamic mechanical thermal analysis

Testing Methods of Weathered Specimen

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