Factors towards Pencil Scratch Resistance of Protective Sol-Gel Coatings on Polycarbonate Substrate

Chwa, Edmund; Wu, Linda; Chen, Z.

doi:10.4028/0-87849-994-6.339

Cited by 1 publication

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“…(3B) owing to its higher functionality. Upon addition of a small amount of nanofiller, hardness is significantly enhanced, up to F and B grades for FM30BM and FM20BM respectively (Figure 7C), which are in the range of surface hardness of common polycarbonate [85].…”

Section: Properties Of the Nanocomposite Coatingsmentioning

confidence: 97%

A facile approach to durable, transparent and self-healing coatings with enhanced hardness based on Diels-Alder polymer networks

Fortunato

Marroccoli

Corsini

et al. 2020

Progress in Organic Coatings

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Prolonged durability in outdoor environment and ease of application are highly required features for self-healing coatings. To this end, a novel transparent and self-healing nanocomposite for optical applications, based on Diels-Alder (DA) chemistry is developed in this work. First, a novel, highly soluble, bismaleimide enabled a simple coating fabrication by coupling with furan-functionalized polyacrylates in industrially relevant solvents. The resulting crosslinked coatings exhibited high transparency and complete absence of color, as assessed by UV-vis spectroscopy. Their thermal behavior and the conditions required by the healing process were significantly affected by the degree of furan/maleimide functionality of the system. Secondly, the addition of a small amount of a commercial antioxidant stabilized the optical properties against photo-oxidative weathering, both on clear and titania-pigmented coatings, as determined by colorimetric analysis. Finally, dispersion of silica nanoparticles in the DA-based matrix allowed to enhance the surface hardness of the coatings, while retaining the self-healing ability.

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Section: Properties Of the Nanocomposite Coatingsmentioning

confidence: 97%