UV Curing of Epoxy Resins

Epoxy monomer + Photoinitiator → Cross-linked polymer

概要

Cationic photoinitiators generate strong acids upon UV exposure, which catalyze the ring-opening polymerization of epoxy groups. Unlike free-radical photopolymerization, cationic UV curing continues after the light is removed (dark cure) and is not inhibited by oxygen. This produces highly cross-linked, chemically resistant networks.

日常の例

UV-curable epoxy adhesives are used in electronics assembly, bonding glass to metal, and sealing fiber optic connectors.

産業上の重要性

UV硬化エポキシは電子機器製造、光ファイバー組立、回路基板の保護コーティングに不可欠である。

特性

タイプ
Photochemical
可逆的
いいえ
エネルギー
発熱性
ΔH
-95.0 kJ/mol
触媒
Cationic photoinitiator

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 UV Curing of Epoxy Resins?
The balanced equation is: Epoxy monomer + Photoinitiator → Cross-linked polymer.
What type of reaction is UV Curing of Epoxy Resins?
UV Curing of Epoxy Resins is a photochemical reaction.
Is UV Curing of Epoxy Resins exothermic or endothermic?
UV Curing of Epoxy Resins is exothermic (releases energy). The enthalpy change (ΔH) is -95.0 kJ/mol.
What conditions are needed for UV Curing of Epoxy Resins?
This reaction requires a catalyst (Cationic photoinitiator).