Photopolymerization of Acrylates

n CH₂=CHCOOR → [–CH₂–CH(COOR)–]_n

Visão geral

UV or visible light activates a photoinitiator that generates free radicals, which then initiate chain polymerization of acrylate monomers. The reaction is extremely fast (seconds to minutes) compared to thermal polymerization (hours). This enables rapid curing of coatings, adhesives, and 3D printing resins.

Exemplo do cotidiano

UV-cured gel nail polish at the nail salon hardens in 30 seconds under a UV lamp using this exact photopolymerization reaction.

Importância industrial

A cura UV é utilizada em revestimentos, tintas, adesivos, restaurações dentárias e impressão 3D por estereolitografia. O mercado ultrapassa os 10 mil milhões de dólares anuais.

Propriedades

Tipo: Photochemical
Reversível: Não
Energia: Exotérmico
ΔH: -78,0 kJ/mol
Catalisador: Photoinitiator (e.g., benzoin)

Reações relacionadas

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Frequently Asked Questions

What is the equation for Photopolymerization of Acrylates?

The balanced equation is: n CH₂=CHCOOR → [–CH₂–CH(COOR)–]ₙ.

What type of reaction is Photopolymerization of Acrylates?

Photopolymerization of Acrylates is a photochemical reaction.

Is Photopolymerization of Acrylates exothermic or endothermic?

Photopolymerization of Acrylates is exothermic (releases energy). The enthalpy change (ΔH) is -78.0 kJ/mol.

What conditions are needed for Photopolymerization of Acrylates?

This reaction requires a catalyst (Photoinitiator (e.g., benzoin)).