Photopolymerization of Acrylates

n CH2=CHCOOR → [–CH2–CH(COOR)–]n

概要

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.

日常の例

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

産業上の重要性

UV硬化はコーティング、インク、接着剤、歯科充填材、光造形3Dプリンティングに使用される。市場規模は年間100億ドルを超える。

特性

タイプ
Photochemical
可逆的
いいえ
エネルギー
発熱性
ΔH
-78.0 kJ/mol
触媒
Photoinitiator (e.g., benzoin)

関連する反応

Photochemical Smog Formation (NO₂ Photolysis) Photochromism of Spiropyran Chlorophyll Fluorescence Photodegradation of Methylene Blue by TiO₂ Photodissociation of Chlorine Gas Silver Bromide Photodecomposition Cis-Trans Isomerization of Retinal Photosynthesis Ozone Formation by UV Light Dye-Sensitized Solar Cell (Grätzel Cell)

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)).