Photopolymerization of Acrylates

n CH2=CHCOOR → [–CH2–CH(COOR)–]n

개요

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.

일상 속 예시

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

산업적 중요성

UV 경화는 코팅, 잉크, 접착제, 치과 충전재, 스테레오리소그래피 3D 프린팅에 사용됩니다. 시장은 연간 100억 달러를 초과합니다.

성질

유형
Photochemical
가역 반응
아니오
에너지
발열
ΔH
-78.0 kJ/mol
촉매
Photoinitiator (e.g., benzoin)

관련 반응

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)).