Ultra rapid prediction of the durability of coatings for plastics using plasma erosion

Falla, N. A. R.

doi:10.1007/bf02693867

Cited by 3 publications

(1 citation statement)

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“…7,[19][20][21] This "erosion" model does not implicate pits of micron dimensions as the proximal cause of gloss changes in some pigmented coatings. However, the "contraction" model of Colling and Dunderdale, which is based on the idea of coating binder mass loss not only at the surface, but as far into the coating as photons can penetrate, predicts that inhomogeneous distributions of pigment particles, such as pigment aggregates, should lead to the appearance of larger scale surface roughness features after weathering.…”

Section: Standardization Of Lscm 2d Intensity Projection Imagesmentioning

confidence: 99%

Relating gloss loss to topographical features of a PVDF coating

Faucheu

Wood

Sung

et al. 2006

J Coat. Technol. Res.

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Semi-gloss commercial poly(vinylidene fluoride) (PVDF) coatings typically have 60° gloss values between 20 and 50.Gloss is affected by PVDF crystallite structures and by the pigmentation. In this article, we have demonstrated that for some pigmented PVDF coatings, after 10 years of Florida exposure, the principal proximal cause of gloss changes is the formation of micron-scale pits, rather than the emergence of pigment particles at the coating surface. We have used laser scanning confocal microscopy (LSCM) and light scattering to characterize the surface topography and near-surface structure of weathered and unweathered PVDF coatings. Florida-weathered PVDF coatings show only a modest increase in the root mean square (RMS) roughness of the surface, even when noticeable gloss loss has occurred. Changes in gloss can be correlated with surface roughness and other topographical features, including the formation of pits and the emergence of pigments.

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Section: Standardization Of Lscm 2d Intensity Projection Imagesmentioning

confidence: 99%