Design of Porous Polymeric Materials from Interpenetrating Polymer Networks (IPNs): Poly(dl -lactide)/Poly(methyl methacrylate)-Based Semi-IPN Systems
| Autor: | Philippe Guérin, Géraldine Rohman, Françoise Lauprêtre, Sylvie Boileau, Daniel Grande |
|---|---|
| Přispěvatelé: | Institut de Chimie et des Matériaux Paris-Est (ICMPE), Institut de Chimie du CNRS (INC)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS) |
| Rok vydání: | 2005 |
| Předmět: |
Materials science
Polymers and Plastics Bulk polymerization pore-size distribution Scanning electron microscope Radical polymerization 02 engineering and technology mesoporous materials 010402 general chemistry 01 natural sciences Inorganic Chemistry chemistry.chemical_compound Oligoester Polymer chemistry Materials Chemistry Methyl methacrylate Porosity chemistry.chemical_classification Organic Chemistry Polymer poly(methyl methacrylate) monomers 021001 nanoscience & nanotechnology Poly(methyl methacrylate) 0104 chemical sciences chemistry thin-films thermoporometry visual_art miscibility visual_art.visual_art_medium 0210 nano-technology |
| Zdroj: | Macromolecules Macromolecules, American Chemical Society, 2005, 38 (17), pp.7274-7285. ⟨10.1021/ma0501390⟩ |
| ISSN: | 1520-5835 0024-9297 |
| DOI: | 10.1021/ma0501390 |
| Popis: | 1 - Article; Oligoester-containing semiinterpenetrating polymer networks (semi-IPNs) can be effectively used as precursors for the generation of (meso)porous networks with tunable pore sizes. In a first step, novel poly(dl-lactide) (PLA)/poly(methyl methacrylate) (PMMA)-based semi-IPNs were prepared by varying two structural parameters, namely the cross-link density of PMMA subnetwork (initial MMA/dimethacrylate composition ranging from 99/1 to 90/10 mol %) and the cross-linker nature (bisphenol A dimethacrylate, diurethane dimethacrylate). The kinetics of the free-radical cross-linking process was monitored by real-time near-infrared spectroscopy. In a second step, the extraction of the un-cross-linked oligoester subchains from the semi-IPNs was investigated. The possibilities afforded by this straightforward and versatile route to (meso)porous polymeric materials were discussed, and the porosity of the resulting methacrylic networks was examined by scanning electron microscopy (SEM) and thermoporometry using differential scanning calorimetry (DSC). The dependence of pore sizes and pore size distributions on the cross-linker content and nature could be related to turbidity measurements of semi-IPN precursors and explained in terms of polymerpolymer miscibility through the evaluation of PLA/PMMA interaction parameters. |
| Databáze: | OpenAIRE |
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