Real-time FT-IR as a non-destructive and non-invasive method for straightforward on-line monitoring of cationic photopolymerization
Authors:
- Filip Petko,
- Andrzej Świeży,
- Mariusz Galek,
- Joanna Ortyl
Abstract
Materials based on the cationic photopolymerization of monomers, such as vinyl ethers, epoxides, oxetanes, and glycidyls, exhibit favorable properties as the fast cure, low shrinkage, good adhesion, good electrical properties, and no oxygen inhibition [1]. That the reason for the growing interest in cationic photopolymerization in many fields of industry [2-4]. Hence, the need for an effective technique for monitoring the progress of cationic photopolymerization. FT-IR is one of the most common techniques used to examine the monomers behavior during polymerization [5]. The use of this method in real-time mode provides direct insight into the course of the polymerization on-line and allows to monitor the decrease in monomer concentration and, in some cases, increase in the number of polymeric bonds in time during the polymerization process. This technique makes it possible to precisely determine the degree of monomer conversion. Additionally, it can be used to monitor photoinitiated polymerization. For this purpose, the spectrometer is equipped with a special attachment with a sample holder and light guide that provide irradiation to the sample. Polymerizing compositions are measured on the barium fluoride tablet or between polypropylene foils. This approach allows for simultaneous irradiation of sample and IR spectrum recording with no interference in the photopolymerization process. The real-time FT-IR technique is very convenient in the examination of photoinitiators activity during the polymerization process. Hence, we would like to present the utilization of this method in monitoring polymerization of cationically polymerizable monomers photoinitiated with a new highly efficient Sylanto photoinitiator [6]. Measurements were carried out using an LED light source emitting light at 405nm. During irradiation decrease in the band intensity of such monomers as vinyl ether (~1620cm-1), epoxides (~790cm-1), oxetanes (~980cm-1), and glycidyls (~915cm-1) was monitored in;real-time;mode. Results are presented as time dependence of the monomer conversion degree profiles. Their comparison makes it possible to determine the activity of the used photoinitiator.
- Record ID
- CUTfa8ce5e0ced34787acafec5d2217cf9a
- Publication categories
- ; ;
- Author
- Pages
- 336
- Substantive notes
- Miejsce wyd. wg miejsca konf.
- Book
- 11th International Conference on Advanced Vibrational Spectroscopy, 23rd-26th August 2021 : online : abstract book, 2021, Kraków, [s.n.]
- Keywords in English
- Infra-red, FT-IR, on-line monitoring, photopolymerization, cationic photopolymerization, IPNs, Interpenetrating Polymer Networks, copolymers, real-time FR-IR, photoinitiators, on-line measurements
- URL
- https://icavs.org/gb/program/webinars-of-companies.html Opening in a new tab
- Related project
- Molecular desing, synthesis and application of photoinitiator-catalysts (PICs) for photopolymerization reactions. . Project leader at PK: , ,
- Language
- eng (en) English
- License
- Score (nominal)
- 0
- Uniform Resource Identifier
- https://cris.pk.edu.pl/info/article/CUTfa8ce5e0ced34787acafec5d2217cf9a/
- URN
urn:pkr-prod:CUTfa8ce5e0ced34787acafec5d2217cf9a
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