Abstract
Several isotactic poly (methyl methacrylates) (iPMMA), with isotactic triad contents ranging from 46 to 100%, have been investigated after crystallization in the melt at different temperatures by differential scanning calorimetry, polarizing microscopy and small-angle light scattering. It was found that the crystallization of iPMMA, even of samples with high isotactic content, is slow. It never gives high degrees of crystallinity, but nevertheless leads to a spherulitic structure.
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The average radius of 7 μm for ISO-5 was measured by polarized microscopy since the Hv SALS pattern could not be observed due to the low spherulitic concentration.
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Lemieux, E., Prud'homme, R.E. Crystallization and morphology of isotactic poly(methyl methacrylates). Polymer Bulletin 21, 621–626 (1989). https://doi.org/10.1007/BF00264144
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DOI: https://doi.org/10.1007/BF00264144