Photopolymerization of Acrylates

n CH2=CHCOOR → [–CH2–CH(COOR)–]n

अवलोकन

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.

रोजमर्रा का उदाहरण

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

औद्योगिक महत्व

UV curing is used for coatings, inks, adhesives, dental fillings, and stereolithography 3D printing. The market exceeds $10 billion annually.

गुण

प्रकार
Photochemical
प्रतिवर्ती
नहीं
ऊर्जा
ऊष्माक्षेपी
ΔH
-78.0 kJ/mol
उत्प्रेरक
Photoinitiator (e.g., benzoin)

संबंधित अभिक्रियाएँ

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)).