Photopolymerization of Acrylates

n CH2=CHCOOR → [–CH2–CH(COOR)–]n

概述

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.

日常示例

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

工业重要性

UV固化技术用于涂料、油墨、胶粘剂和电子封装材料，全球市场规模超过数十亿美元，是重要的绿色制造技术。

属性

类型
Photochemical
可逆
否
能量
放热
ΔH
-78.0 kJ/mol
催化剂
Photoinitiator (e.g., benzoin)

相关反应

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)).