Synthesis of new photocurable oligoisoprenes and kinetic studies of their radical photopolymerization
| Autor: | Laurence Lecamp, Irène Campistron, Jean Francois Pilard, Pamela Pasetto, Albert Laguerre, Claude Bunel, Jean-Luc Mouget, Rachid Jellali |
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| Přispěvatelé: | Unité de chimie organique moléculaire et macromoléculaire (UCO2M), Le Mans Université (UM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC), Polymères, biopolymères, membranes (PBM), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences appliquées Rouen Normandie (INSA Rouen Normandie), Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Institut National des Sciences Appliquées (INSA)-Normandie Université (NU)-Université de Rouen Normandie (UNIROUEN), Normandie Université (NU), Mer, molécules et santé EA 2160 (MMS), Le Mans Université (UM)-Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST), Université de Nantes (UN)-Université de Nantes (UN)-Université de Nantes - UFR des Sciences Pharmaceutiques et Biologiques, Université de Nantes (UN)-Université de Nantes (UN) |
| Rok vydání: | 2012 |
| Předmět: |
Materials science
Polymers and Plastics Kinetics Chemical modification 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Diluent 0104 chemical sciences Surfaces Coatings and Films Reaction rate Light intensity [CHIM.POLY]Chemical Sciences/Polymers Photopolymer Polymerization Polymer chemistry Materials Chemistry 0210 nano-technology Photoinitiator ComputingMilieux_MISCELLANEOUS |
| Zdroj: | Journal of Applied Polymer Science Journal of Applied Polymer Science, Wiley, 2012, 127 (2), pp.1359-1368. ⟨10.1002/app.37691⟩ |
| ISSN: | 0021-8995 1097-4628 |
| DOI: | 10.1002/app.37691 |
| Popis: | New photosensitive oligoisoprenes were synthesized by controlled degradation of high molecular weight cis-1,4-polyiso- prene and successive chemical modification of the chain-ends. Oligomers with diacrylate extremities were synthesized, characterized, and used in photocrosslinking reactions in different conditions. The photoinitiated polymerization of the diacrylate oligoisoprenes was carried out using 2,2-dimethyl-2-hydroxyacetophenone (Darocur 1173) as initiator and the reaction was monitored by photoca- lorimetry-DSC and real time FTIR spectroscopy. The influence of oxygen, photoinitiator concentration, light intensity, diluting agent, and oligomers molecular weight on the reaction rate was investigated. It was found that the presence of oxygen does not influence the photopolymerization kinetics of the diacrylate oligoisoprenes. Maximum conversion was obtained for a photoinitiator concentra- tion of 5% (w/w) and for a light intensity of 13.5 mW/cm 2 . Decreasing the formulation viscosity by addition of a diluent (1,6-hexa- nediol diacrylate) raised the photopolymerization rate, by increasing the reactive species mobility. V C 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 000: 000-000, 2012 |
| Databáze: | OpenAIRE |
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