UV curing kinetics and mechanism of a highly branched polycarbosilane

Houbu Li; Litong Zhang; Laifei Cheng; Haitao Kang; Yiguang Wang

doi:10.1002/aoc.1469

UV curing kinetics and mechanism of a highly branched polycarbosilane

Houbu Li, Litong Zhang, Laifei Cheng, Haitao Kang, Yiguang Wang^*

^*Corresponding author for this work

Northwestern Polytechnical University Xian

Research output: Contribution to journal › Article › peer-review

5 Citations (Scopus)

Abstract

The UV curing process in both air and nitrogen atmosphere for the highly branched polycarbosilane system was investigated by differential scanning photo calorimeter. The UV cured products were characterized by Fourier-transform infrared spectrometry (FTIR). By comparison with the FTIR results of the uncured liquid mixture and the cured samples, the possible cross-linking reactions were determined. The kinetics of the curing systems was studied. The rate constant k was calculated based on the experimental results. The activation energies in different curing conditions were obtained. According to these results, it was learned that the mechanism for the UV curing in nitrogen was controlled by the photolysis of photoinitiator. Comparably, the UV curing process in air was complicated. It was affected by not only the photolysis of photoinitiator, but also oxygen and tripropane glycol diacrylate.

Original language	English
Pages (from-to)	44-49
Number of pages	6
Journal	Applied Organometallic Chemistry
Volume	23
Issue number	1
DOIs	https://doi.org/10.1002/aoc.1469
Publication status	Published - Jan 2009
Externally published	Yes

Keywords

Activation energy
Kinetics
Mechanism
Polycarbosilane
UV curing

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10.1002/aoc.1469

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abstract = "The UV curing process in both air and nitrogen atmosphere for the highly branched polycarbosilane system was investigated by differential scanning photo calorimeter. The UV cured products were characterized by Fourier-transform infrared spectrometry (FTIR). By comparison with the FTIR results of the uncured liquid mixture and the cured samples, the possible cross-linking reactions were determined. The kinetics of the curing systems was studied. The rate constant k was calculated based on the experimental results. The activation energies in different curing conditions were obtained. According to these results, it was learned that the mechanism for the UV curing in nitrogen was controlled by the photolysis of photoinitiator. Comparably, the UV curing process in air was complicated. It was affected by not only the photolysis of photoinitiator, but also oxygen and tripropane glycol diacrylate.",

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T1 - UV curing kinetics and mechanism of a highly branched polycarbosilane

AU - Li, Houbu

AU - Zhang, Litong

AU - Cheng, Laifei

AU - Kang, Haitao

AU - Wang, Yiguang

PY - 2009/1

Y1 - 2009/1

N2 - The UV curing process in both air and nitrogen atmosphere for the highly branched polycarbosilane system was investigated by differential scanning photo calorimeter. The UV cured products were characterized by Fourier-transform infrared spectrometry (FTIR). By comparison with the FTIR results of the uncured liquid mixture and the cured samples, the possible cross-linking reactions were determined. The kinetics of the curing systems was studied. The rate constant k was calculated based on the experimental results. The activation energies in different curing conditions were obtained. According to these results, it was learned that the mechanism for the UV curing in nitrogen was controlled by the photolysis of photoinitiator. Comparably, the UV curing process in air was complicated. It was affected by not only the photolysis of photoinitiator, but also oxygen and tripropane glycol diacrylate.

AB - The UV curing process in both air and nitrogen atmosphere for the highly branched polycarbosilane system was investigated by differential scanning photo calorimeter. The UV cured products were characterized by Fourier-transform infrared spectrometry (FTIR). By comparison with the FTIR results of the uncured liquid mixture and the cured samples, the possible cross-linking reactions were determined. The kinetics of the curing systems was studied. The rate constant k was calculated based on the experimental results. The activation energies in different curing conditions were obtained. According to these results, it was learned that the mechanism for the UV curing in nitrogen was controlled by the photolysis of photoinitiator. Comparably, the UV curing process in air was complicated. It was affected by not only the photolysis of photoinitiator, but also oxygen and tripropane glycol diacrylate.

KW - Activation energy

KW - Kinetics

KW - Mechanism

KW - Polycarbosilane

KW - UV curing

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JO - Applied Organometallic Chemistry

JF - Applied Organometallic Chemistry

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UV curing kinetics and mechanism of a highly branched polycarbosilane

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Keywords

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