Influence of viscoelastic properties on the adhesion durability in epoxy coatings with mixed curing agents

سال انتشار: 1394
محل انتشار: ششمین کنگره بین المللی رنگ و پوشش
کد COI اختصاصی: ICCC06_216
زبان مقاله: انگلیسی
تعداد مشاهده: 605

نویسندگان

Surface Coating and Corrosion Department, Institute for Color Science and Technology, Tehran, Iran

Surface Coating and Corrosion Department, Institute for Color Science and Technology, Tehran, Iran - Center Of Excellence for Color Science and Technology, Tehran, Iran

S. Rastegar

Amirkabir University of Technology, Polymer and Color Engineering Faculty, Tehran, Iran

چکیده

Epoxy resin (Araldite GY 783) were cured with two type hardeners (Polyether polyamine, Cycloaliphatic Polyamine) in four different mixing ratio, to achieve various mechanical properties. Viscoelastic properties such as elastic module and creep- recovery of samples were measured by DMTA instrument. Samples were exposed to humidity chamber for 2000 hours and adhesion was measured at wet and dry states over time. Adhesion loss and recovery of adhesion after drying were evaluated by pull-off test. The results showed a good correlation between viscoelastic properties such as elastic module and creep-recovery behavior of coatings, and adhesion durability. It was found that glass transition temperature and elastic behavior of the coatings correlate recovery of adhesion after wet and dry cycles.

کلیدواژه ها

Adhesion durability- Viscoelastic properties- Creep and recovery- Wet adhesion- Recovered adhesion

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