1. Structural features of functional polysiloxanes radical and ionic photo-curing for laser printing applications
- Author
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Konstantin V. Deriabin, Alina Manshina, Dmitrii Pankin, Sergey S. Rzhevskii, Regina M. Islamova, and Pavel M. Talianov
- Subjects
chemistry.chemical_classification ,Thermogravimetric analysis ,Materials science ,Polymers and Plastics ,Organic Chemistry ,Cationic polymerization ,02 engineering and technology ,Polymer ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,0104 chemical sciences ,Photopolymer ,Polymerization ,Chemical engineering ,chemistry ,Materials Chemistry ,Copolymer ,0210 nano-technology ,Photoinitiator ,Curing (chemistry) - Abstract
The laser induced curing of acryloxy terminated ethyleneoxide dimethylsiloxane-ethyleneoxide ABA block copolymer (PDMS-AO) and (3-glycidoxypropyl)trimethoxysilane (GPTMS) was carried out with 2-hydroxy-2-methylpropiophenone as radical photoinitiator and p-(octyloxyphenyl)phenyliodonium hexafluoroantimonate as cationic photoinitiator, respectively. The cross-linking mechanisms for both mixtures were determined through monitoring of photocuring by SSNMR, FTIR and Raman spectroscopies. The obtained silicone rubbers were tested by swelling measurements and thermogravimetric analysis. In comparison with PDMS-AO, cross-linked GPTMS had slightly more cross-linking density (by approximately 20% more). The cross-linked GPTMS was more thermally stable in air than cured PDMS-AO (by c.a. 190° C) due to both mechanisms: epoxy polymerization and Si–O–Si formation. The possibility of laser printing with defined framework for PDMS-AO was successfully demonstrated that allows obtaining laser printed polymer objects.
- Published
- 2021
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