Abstract
The effects of tetrahydrofuran (THF) on the physical properties of poly(methyl methacrylate) at (PMMA)/silica nanoparticle interfaces in polymer nanocomposites were investigated via differential scanning calorimetry (DSC), Fourier transform infrared (FT-IR) spectroscopy, and X-ray diffraction (XRD) analysis. Amorphous structures containing PMMA chains with large numbers of trans-gauche conformers were observed in the annealed samples. The amorphous structures in the samples cast from THF suspensions contained PMMA chains rich in trans–trans conformers. These amorphous structures differed from those of neat PMMA prepared without silica. Although the polymer chain mobility was reduced due to interactions between PMMA and the silica nanoparticles, trans–trans-enriched PMMA chains within the amorphous structures were less affected by these interactions. When the amorphous structures were heated above the glass transition temperature of PMMA, the proportion of trans–gauche conformers increased.
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Acknowledgements
This work was supported by Grant-in-Aid for JSPS Research Fellow Number JP19J14528. The XRD measurements were performed at the Ookayama Materials Analysis Division, Technical Department.
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Matsuura, K., Kuboyama, K. & Ougizawa, T. Effect of tetrahydrofuran on poly(methyl methacrylate) and silica in the interfacial regions of polymer nanocomposites. Polym J 52, 1203–1210 (2020). https://doi.org/10.1038/s41428-020-0375-0
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DOI: https://doi.org/10.1038/s41428-020-0375-0
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