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- W2035825364 abstract "Abstract This paper reviews the research programme of the Maidenhead Laboratory of Courtaulds Ltd. devoted to the synthesis of textile fibres based on poly(α-amino acids), regarded as models for natural silk. The work involved studies of the preparation, properties and structures of the polymers and development of suitable fibre-spinning techniques. Polymers were prepared from N -carboxy-α-amino acid anhydrides (NCAs); the reactions involved, following initiation by protic or aprotic bases, are outlined. Applications of polarized infra-red radiation in elucidating polymer structure were pioneered at Maidenhead, and played a major role in the recognition of the α and β modifications of poly (α-amino acids) and their similarities to the fibrous proteins. The two forms show differences in properties, notably solubility, arising from different patterns of hydrogen bonding. X-ray diffraction patterns of oriented fibres of β-poly- l -alanine are remarkably similar to those of many silk fibroins. Solution-spinning is the only suitable process for fibre production from these polymers, and a novel method, permitting relatively high speeds, is described. Finished fabrics woven from 100 denier/60 filament yarn of poly (γ-methyl- l -glutamate) were found to possess many of the distinctive silk-like properties, together with a few additional easy-care features. Some costing details of the overall process are given; for 10 × 10 6 lb per year production, l -glutamic acid costs just exceeded 30% of the total." @default.
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- W2035825364 date "1996-03-01" @default.
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- W2035825364 title "Spinning silk at Maidenhead: the polypeptide project" @default.
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- W2035825364 doi "https://doi.org/10.1016/0928-4931(95)00131-x" @default.
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