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Journal of Polymer Research

Erschienen in:

01.06.2021 | ORIGINAL PAPER

Poly(methyl methacrylate)-octatrimethylsiloxy polyhedral oligomeric silsesquioxane composite syntactic foams with bimodal pores

verfasst von: Merve Ozkutlu, Goknur Bayram, Cerag Dilek

Erschienen in: Journal of Polymer Research | Ausgabe 6/2021

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Abstract

Bimodal poly(methyl methacrylate) (PMMA) foams are produced with a new method combining syntactic foam production and supercritical CO₂ (scCO₂) foaming. Bimodal pore structure offers several potential advantages to foam properties, such as reduced mass density and excellent thermal and sound insulation properties. To produce the foams, first PMMA composites are produced with hollow glass microspheres (HGMs) and octatrimethylsiloxy polyhedral oligomeric silsesquioxane (POSS) nanoparticles using a twin screw extruder. The composite syntactic foams are then processed with scCO₂ to form bimodal pore structured PMMA-HGM-POSS composite foams. In the foam matrix, large pores form due to the CO₂ diffusion in the matrix towards the voids between the matrix and HGM surfaces, and small pores are formed at the nucleation cites. Highly CO₂-philic POSS nanoparticles contribute to scCO₂ foaming as cell nucleators enhancing the foaming performance of the syntactic composites. The effects of process pressure, time, and concentrations of HGMs and POSS nanoparticles on the foam morphology are studied. The highest decrease achieved in the foam density compared to that of the bulk polymer is 69% with only 12% decrease in the hardness.

Vorheriger Artikel One-step synthesis and characteristics of LiOH-castor oil based stable polyurethane foam

Nächster Artikel Conductivity, structural and thermal properties of corn starch-lithium iodide nanocomposite polymer electrolyte incorporated with Al2O3

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Titel: Poly(methyl methacrylate)-octatrimethylsiloxy polyhedral oligomeric silsesquioxane composite syntactic foams with bimodal pores
verfasst von: Merve Ozkutlu
Goknur Bayram
Cerag Dilek
Publikationsdatum: 01.06.2021
Verlag: Springer Netherlands
Erschienen in: Journal of Polymer Research / Ausgabe 6/2021
Print ISSN: 1022-9760
Elektronische ISSN: 1572-8935
DOI: https://doi.org/10.1007/s10965-021-02576-0

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