Cationic two-photon induced polymerization with high dynamic range

Yuri Boiko, Joannes M. Costa, Mark Wang, Sadik Esener

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

Cationic-induced two-photon photo-polymerization is demonstrated at 710 nm, using an isopropylthioxanthone / diarylidonium salt initiating system for the cationic polymerization of an epoxide. In-situ monitoring of the polymer conversion using interferometry allows for determination of the polymerization threshold J2th, polymerization rate R and its dependence of initiator's concentration z. Best J2th achieved is 1 GW/cm 2, with a dynamic range of > 100, i.e. the material can be fully polymerized at intensities > 100 times the threshold level without damage. The R is found to be proportional to the m=1.7 power of the intensity, or R = [C (J-J2th)]m = [C (J-J2th)]1.7, which implies a significantly stronger localization of the photochemical response than that of free radical photoinitiators. Both R and J2th significantly improve when the concentration z of the initiator (onium salt) increases, reduction of J2th exhibiting z-m trend.

Original languageEnglish (US)
Pages (from-to)571-584
Number of pages14
JournalOptics Express
Volume8
Issue number10
StatePublished - 2001
Externally publishedYes

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dynamic range
polymerization
photons
initiators
salts
thresholds
epoxy compounds
free radicals
interferometry
damage
trends
polymers

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Cationic two-photon induced polymerization with high dynamic range. / Boiko, Yuri; Costa, Joannes M.; Wang, Mark; Esener, Sadik.

In: Optics Express, Vol. 8, No. 10, 2001, p. 571-584.

Research output: Contribution to journalArticle

Boiko, Y, Costa, JM, Wang, M & Esener, S 2001, 'Cationic two-photon induced polymerization with high dynamic range', Optics Express, vol. 8, no. 10, pp. 571-584.
Boiko, Yuri ; Costa, Joannes M. ; Wang, Mark ; Esener, Sadik. / Cationic two-photon induced polymerization with high dynamic range. In: Optics Express. 2001 ; Vol. 8, No. 10. pp. 571-584.
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