Abstract
AbstractBlock oligomers of general formula CH3(CH2)nO[CH2CH2O]9(CH2)nCH3 where n = 0 to 25 have been prepared. All blocks are monodisperse. Examination of their crystallinity (by differential scanning calorimetry, X‐ray scattering, infra‐red and Raman spectroscopy) shows that, within defined limits (n > 9, crystallisation temperature high), the block oligomers can crystallise completely. A likely structure is 7/2 helical monoclinic oxyethylene blocks and planar zigzag low density methylene blocks, with the oxyethylene helices normal to the lamella end‐planes and the methylene chains titled.
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