Foaming behavior of 1-vinyl-2-pyrrolidone–methyl methacrylate copolymers under ScCO2

Autor:	Miriam Trigo-López, Félix C. García, Cipriano Ramos, Sagrario Beltrán, Jose Antonio Reglero Ruiz, Saúl Vallejos, José M. García
Rok vydání:	2020
Předmět:	chemistry.chemical_classification Materials science Polymers and Plastics Organic Chemistry 02 engineering and technology Polymer 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences chemistry.chemical_compound chemistry Polymer chemistry Copolymer 1-vinyl-2-pyrrolidone Solubility Methyl methacrylate 0210 nano-technology
Zdroj:	Cellular Polymers. 39:203-219
ISSN:	1478-2421 0262-4893
DOI:	10.1177/0262489320929226
Popis:	We report on the preparation, characterization, and foaming behavior of cellular polymers based on 1-vinyl-2-pyrrolidone (VP) and methyl methacrylate (MMA). Samples with different feed ratios proportions of VP and MMA were prepared following the bulk radical copolymerization procedure, using commercially available monomers and testing two different initiators (photochemical and thermal), obtaining solid samples of around 1.5 mm thick. To evaluate the polymerization process, the chemical structure of VP/MMA copolymers was determined by proton nuclear magnetic resonance measurements. In a second step, single-batch supercritical carbon dioxide (CO2) foaming tests were carried out at different temperatures to evaluate the influence of the VP to MMA feed ratios and the foaming temperature in the density, the presence of solid outer skin, the CO2 sorption–desorption process, and the cellular morphology of the foamed polymers.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::c95e37c105633c93013f2568c197437b https://doi.org/10.1177/0262489320929226 Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
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