NDLI: Nanocellular foaming of fluorine containing block copolymers in carbon dioxide: the role of glass transition in carbon dioxide

Content Provider	Royal Society of Chemistry (RSC)
Author	Yokoyama, Hideaki Dutriez, Cédric Satoh, Kotaro Kamigaito, Masami
Copyright Year	2012
Abstract	Carbon dioxide foaming in polymeric materials has been recognized as an environmentally friendly method to introduce microfoam consisting of cells of micrometre size (microcells). Our group has demonstrated that CO2-philic fluorinated block domains of block copolymers worked as nuclei of foams and further decreased the size of cells to around 10 nm (nanocells). In this study, we introduced nanocells to poly[(methyl methacrylate)-b-(perfluorooctylethyl methacrylate)] (PMMA–PFMA, MF) and poly[(perfluorooctylethyl methacrylate)-b-(methyl methacrylate)-b-(perfluorooctylethyl methacrylate)] (PFMA–PMMA–PFMA, FMF), and compared the resultant porosity with those of polystyrene-based fluorinated block copolymers previously studied. The temperature providing a maximum porosity for the PMMA based copolymers was lower than that for the PS based copolymers. We further measured the glass transition temperatures, Tg, of skeleton blocks, i.e. PS and PMMA, in the presence of CO2 using a quartz crystal resonator and revealed that the temperature of maximum porosity is correlated to the decreased Tg of the skeleton polymers in CO2.
Starting Page	2821
Ending Page	2827
Page Count	7
File Format	HTM / HTML PDF
ISSN	20462069
Volume Number	2
Issue Number	7
Journal	RSC Advances
DOI	10.1039/c2ra01268e
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Glass transition PMMA Carbon dioxide Microfoam Micrometre Porosity Methyl methacrylate Quartz FMF Para-Methoxy-N-methylamphetamine
Content Type	Text
Resource Type	Article
Subject	Chemistry Chemical Engineering

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