Nanospace preparation by crosslinking helical syndiotactic‐poly(methacrylic acid) in acetonitrile/water after stereocomplexation |
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| Authors: | Hiroharu Ajiro Masumi Maegawa Mitsuru Akashi |
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| Institution: | 1. The Center for Advanced Medical Engineering and Informatics, Osaka University, 2‐2, Yamada‐oka, Suita, Osaka 565‐0871, Japan;2. Department of Applied Chemistry, Graduate School of Engineering, Osaka University, 2‐1 Yamada‐oka, Suita, Osaka 565‐0871, Japan |
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| Abstract: | Various molecular weights of isotactic (it‐)‐poly(methyl methacrylate) (PMMA) and syndiotactic (st‐)‐poly(methacrylic acid) (PMAA) were used to form an it‐PMMA/st‐PMAA (1/2) stereocomplex in acetonitrile/water as a suspension. The stereocomplex was tentatively crosslinked with 1,11‐diamino‐3‐6‐9‐trioxaundecane and water soluble carbodiimide at 10, 20, and 40 mol % concentrations versus MAA unit. The it‐PMMA was extracted from the crosslinked stereocomplex under alkaline conditions, and the successive re‐incorporation of the it‐PMMA was carried out. During the extraction and re‐incorporation processes, the FTIR/ATR spectra showed the absence and generation of a peak at 860 cm?1, respectively, which was characteristic of this stereocomplex. The result of the XRD analysis also corresponded with the extraction and re‐incorporation behavior of it‐PMMA; peaks were observed at 2θ = 12 and 15°, d = 0.74 and 0.59 nm, respectively. This study showed that the nanospaces of helical st‐PMAA were available in acetonitrile/water in a suspended state using a crosslinking approach. © 2012 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem, 2012 |
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| Keywords: | crosslinking host– guest systems isotactic networks stereospecific polymers syndiotactic |
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