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

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 commerc...

Full description

Saved in:
Bibliographic Details
Published in:Cellular Polymers 2020-09, Vol.39 (5), p.203-219
Main Authors: Trigo-López, Miriam, Reglero Ruiz, José A, Vallejos, Saúl, Ramos, Cipriano, Beltrán, Sagrario, García, Félix C, García, José M
Format: Article
Language:English
Subjects:
Carbon dioxide
Copolymerization
Copolymers
Evaluation
Foaming
Morphology
NMR
Nuclear magnetic resonance
Plastic foam
Polymerization
Polymers
Polymethyl methacrylate
Scanning electron microscopy
Software
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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.
ISSN:0262-4893
1478-2421
DOI:10.1177/0262489320929226