Natural and artificial weathering characteristics of stabilized acrylic–urethane paints

Merlatti, C.; Perrin, F.X.; Aragon, E.; Margaillan, André

doi:10.1016/j.polymdegradstab.2008.02.008

Cited by 62 publications

(43 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Numerous studies have been devoted to protect SPU coatings against weathering conditions [1][2][3][4]. Application of inorganic nanoparticles is one of the most widely used methods to improve both mechanical and weathering properties of polymeric coatings [5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Transparent and flexible films of new segmented polyurethane nanocomposites incorporated by NH2-functionalized TiO2 nanoparticles

Behniafar

Alimohammadi

Malekshahinezhad

2015

Progress in Organic Coatings

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

Transparent and flexible films of new segmented polyurethane nanocomposites incorporated by NH2-functionalized TiO2 nanoparticles

Behniafar

Alimohammadi

Malekshahinezhad

2015

Progress in Organic Coatings

View full text Add to dashboard Cite

“…Using eqs 2 and 3, we calculated the average molecular weight between cross-links and the average crosslink density. Note that the temperature at which the equilibrium E 0 is calculated is the temperature corresponding to the minimum E 0 of each individual curve and that the density of the coating has been estimated as 1.0 g/cm 3 . To assess the changes in height (maximum value) and width (d half temperature 30 ) as objectively as possible, an extreme function fit on the tan d data was used, see Figure 2.…”

Section: Resultsmentioning

confidence: 99%

“…1 Particularly interesting is how the physical changes are linked to the chemical evolution of the coating as a result of degradation. [2][3][4][5] Specifically, the mechanical stability of a coating is an important factor which is expected to be preserved during its service life. It is a common experience that the hardness of clearcoats increases gradually during degradation which results in stiffer and more brittle coatings.…”

Section: Introductionmentioning

confidence: 99%

Degradation of a polyester‐urethane coating: Physical properties

Makki

Adema

Peters

et al. 2015

J Polym Sci B Polym Phys

View full text Add to dashboard Cite

In this article we studied the evolution of thermomechanical properties of a polyester-urethane coating during degradation under different degradation conditions, i.e., aerobic and anaerobic conditions with and without dry/wet cycling during degradation. Dynamic mechanical and thermal analyses show that under aerobic conditions the coatings become stiffer and more brittle in the glassy state. This stiffening is probably due to the increase in the amount of hydrogen bonding and the formation of oxidized groups which increase the polarity of the material and enhance the interactions of the polymer segments. However, oxidation reactions result in a considerable decrease in cross-link density and stiffness in the rubbery state. Both changes, in the glassy and rubbery states, give rise to development of internal stresses. These stresses increase as the degradation process proceeds. Nevertheless, for samples exposed to anaerobic conditions, the stiffness remains constant in the glassy state and the cross-link density slightly increases as a result of degradation. This reconfirms the dominance of the effect of oxidation reactions on the mechanical failure of the coatings. Oxygen permeation measurements show a more-or-less time-independent diffusion coefficient and a gradual decrease in solubility of oxygen as a function of exposure time. This results in a slight decrease in oxygen permeation (mainly in the early stage of the degradation) as degradation proceeds.

show abstract

“…[5][6][7] In addition, organic-inorganic composite coating also imparts a level of flame retardance and ultraviolet resistance without any loss of optical properties. 4,8,9 These improvements of properties are attributed to the synergistic effects from the components of organic polymer and inorganic filler. [4][5][6] Previous studies [9][10][11] have reported that the addition of functionalised nanosilica to ultraviolet cured coating systems has improved the scratch, abrasion and chemical resistances as well as retained the high gloss and clarity of the substrate.…”

Section: Introductionmentioning

confidence: 99%

“…4,8,9 These improvements of properties are attributed to the synergistic effects from the components of organic polymer and inorganic filler. [4][5][6] Previous studies [9][10][11] have reported that the addition of functionalised nanosilica to ultraviolet cured coating systems has improved the scratch, abrasion and chemical resistances as well as retained the high gloss and clarity of the substrate. This paper focused on the effect of polyurethane (PU)/nanosilica composite coating on the thermomechanical behaviour of polyethylene (PE) substrate.…”

Section: Introductionmentioning

confidence: 99%

Effect of polyurethane/nanosilica composite coating on thermomechanical properties of polyethylene film

Chee

Yaacob

2012

Materials Technology

View full text Add to dashboard Cite

Polyurethane (PU)/nanosilica composite was fabricated and then coated on polyethylene (PE) film using a rod Mayer technique. The silica nanoparticles used have an average particle size of 16 nm, and their weight fractions varied from 0 to 14%. Two different thicknesses of PU/nanosilica coating layer were fabricated, which were 4 and 8 mm. The morphology and thermal mechanical properties of the nanocomposite coated PE film were characterised using scanning electron microscope, dynamic mechanical analyser, thermogravimetric analyser as well as tensile tests. The results showed that a thin layer coating of PU/nanosilica composite has a slightly reduced tensile strength of the PE substrate. However, the nanocomposite coating of up to 8 mm reduced the elongation of PE substrate significantly. The PU/nanosilica composite coating layer increased the tensile modulus and stiffness of the PE substrate. There was no influence of PU/nanosilica composite coating on the thermal degradation rate of the PE film.

show abstract

Natural and artificial weathering characteristics of stabilized acrylic–urethane paints

Cited by 62 publications

References 21 publications

Transparent and flexible films of new segmented polyurethane nanocomposites incorporated by NH2-functionalized TiO2 nanoparticles

Transparent and flexible films of new segmented polyurethane nanocomposites incorporated by NH2-functionalized TiO2 nanoparticles

Degradation of a polyester‐urethane coating: Physical properties

Effect of polyurethane/nanosilica composite coating on thermomechanical properties of polyethylene film

Contact Info

Product

Resources

About