Home

About

Advanced Search

Browse by Discipline

Scientific Societies

E-print Alerts

Add E-prints

E-print Network
FAQHELPSITE MAPCONTACT US


  Advanced Search  

 
Cure depth in photopolymerization: Experiments and theory Jim H. Lee, Robert K. Prud'homme, and Ilhan A. Aksay
 

Summary: Cure depth in photopolymerization: Experiments and theory
Jim H. Lee, Robert K. Prud'homme, and Ilhan A. Aksay
Department of Chemical Engineering and Princeton Materials Institute, Princeton University,
Princeton, New Jersey 08544-5263
(Received 21 August 2000; accepted 27 September 2001)
The depth of photocuring for a model resin system was investigated as a function of
photoinitiator concentration. Direct measurements of gel thickness were made from
thin films of cross-linked multifunctional methacrylate monomer. The monomer,
2,2-bis{4-[2-hydroxy-3-(methacryloxy)propoxy]phenyl}propane, was polymerized in a
solution of trichloroethylene with an ultraviolet laser light source at 325 nm. The
monomer solutions were photocured using varying levels of both photonic energy and
photoinitiator concentration. An optimal photoinitiator concentration that maximized
the gel cure depth was observed. Additionally, two regimes were shown to exist
in which the shrinkage (upon solvent removal) was minimized or maximized. A
model was developed to probe the physics of the system. Good agreement with
experiment was obtained, and the model may be employed to predict both the
existence and location of the optimal photoinitiator concentration and the
corresponding cure depth. The study showed that photoinitiator plays a significant
role in controlling the quality and performance of the formed gel network, with special
regard to thickness of cured layers. This has potential application to fields as diverse

  

Source: Aksay, Ilhan A. - Department of Chemical Engineering, Princeton University

 

Collections: Materials Science