Thermal Characterization of 'Comb-Like' Block Copolymers Based on PCL Obtained by Combining ROP and RAFT Polymerizations
| Autor: | Cristiano Giacomelli, Mario Daniel Ninago, Paulo I. R. Muraro, Andrés Eduardo Ciolino, Marcelo A. Villar, Augusto G.O. de Freitas |
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| Rok vydání: | 2016 |
| Předmět: |
Thermogravimetric analysis
Materials science Polymers and Plastics Dispersity INGENIERÍAS Y TECNOLOGÍAS 02 engineering and technology 010402 general chemistry 01 natural sciences Ring-opening polymerization Differential scanning calorimetry Polymer chemistry Materials Chemistry Copolymer Thermal stability Thermal analysis POLY(e-CAPROLACTONE) Organic Chemistry technology industry and agriculture 021001 nanoscience & nanotechnology Condensed Matter Physics 0104 chemical sciences RING-OPENING POLYMERIZATION Ingeniería Química Polymerization Chemical engineering Otras Ingeniería Química REVERSIBLE ADDITION FRAGMENTATIO CHAIN TRANSFER (RAFT) THERMAL PROPERTIES 0210 nano-technology |
| Zdroj: | Macromolecular Symposia. 368:84-92 |
| ISSN: | 1022-1360 |
| Popis: | In this work we report the synthesis of poly(hydroxyethylmethacrylate-graft-polycaprolactone)-block-poly(caprolactone) copolymers,P(HEMA-g-PCL)-b-PCL, by combining ring-opening polymerization (ROP)and reversible addition-fragmentation chain-transfer polymerization (RAFT).The successful synthesis of the targeted comb-like block copolymersobtained was confirmed by 1H-Nuclear Magnetic Resonance, FourierTransform Infrared Spectroscopy and Size Exclusion Chromatography.Thermal behavior of the copolymers was studied by Differential ScanningCalorimetry, and their thermal stability was investigated by modulatedthermogravimetric analysis. In this sense, the comb-like block copolymersexhibited controlled molar masses between 6,000 g/mol and 45,000 g/mol, andpolydispersity indexes lower than 1.3. Besides, thermal analysis evidenced anoticeable reduction in the melting temperature compared with linear PCLhomopolymer, as well as, in the activation energy for the degradation process. Fil: Ninago, Mario Daniel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Planta Piloto de Ingeniería Química. Universidad Nacional del Sur. Planta Piloto de Ingeniería Química; Argentina Fil: Ciolino, Andrés Eduardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Planta Piloto de Ingeniería Química. Universidad Nacional del Sur. Planta Piloto de Ingeniería Química; Argentina Fil: Villar, Marcelo Armando. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Planta Piloto de Ingeniería Química. Universidad Nacional del Sur. Planta Piloto de Ingeniería Química; Argentina Fil: Freitas, Augusto G.O De. Universidad Federal de Santa Maria; Brasil Fil: Muraro, Paulo I.R.. Universidad Federal de Santa Maria; Brasil Fil: Giacomelli, Cristiano C.. Universidad Federal de Santa Maria; Brasil |
| Databáze: | OpenAIRE |
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