Crosslinked network formation beyond graft copolymers in transparent bisphenol-A Polycarbonate/Poly(methyl methacrylate) blends catalyzed by bis(trifluoromethanesulphonyl)imide based organic salts
| Autor: | Tingzi Yan, Huihui Xu, Yongjin Li |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Thermogravimetric analysis
Materials science Polymers and Plastics Organic Chemistry 02 engineering and technology Compatibilization 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Poly(methyl methacrylate) 0104 chemical sciences Gel permeation chromatography chemistry.chemical_compound Differential scanning calorimetry chemistry Chemical engineering visual_art Materials Chemistry visual_art.visual_art_medium Copolymer Methyl methacrylate Polycarbonate 0210 nano-technology |
| Zdroj: | Polymer. 223:123700 |
| ISSN: | 0032-3861 |
| DOI: | 10.1016/j.polymer.2021.123700 |
| Popis: | It has been widely accepted that the promoted transparency of bisphenol-A Polycarbonate/Poly(methyl methacrylate) (PC/PMMA) blends was attributed to the transesterification induced PC-graft(g)-PMMA copolymer formation during melt extrusion of the blends. However, prior studies fall short of detailed characterization of the PC-g-PMMA copolymers. In this paper, we investigated the effect of different bis(trifluoromethanesulphonyl)imide-based salts on the compatibilization and optical transparency properties of PC/PMMA blends. It was found that Mg(TFSI)2 showed the best compatibilization effect and could enable transparent blend films for PC/PMMA blends at all PMMA compositions as manifested from scanning electron microscopy (SEM) images, differential scanning calorimetry(DSC) and thermogravimetric analysis(TGA). Moreover, elution experiments with mutual solvent left intractable portion indication crosslinked network formation beyond PC-g-PMMA copolymers. Finally, the detailed structure of PC-g-PMMA copolymers was studied by Gel Permeation Chromatography (GPC). To the best of our knowledge, this is the first time to analyze the detailed structure of the PC-g-PMMA copolymers formed during melt extrusion. |
| Databáze: | OpenAIRE |
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