✍ Scribed by Hans R. Kricheldorf; Lars Wahlen; Khezi Chen
No coin nor oath required. For personal study only.
Blends of poly(ε‐caprolactone) as the matrix material and 1,2,4, or 8 wt.‐% of a poly‐peptide were prepared by dissolution in a cosolvent and coprecipitation into cold methanol. A low‐and a high‐molecular‐weight poly(γ‐benzyl L‐glutamate), a poly(γ‐methyl L‐glutamate) and a poly(D,L‐phenylalanine) were used as reinforcing components and compared with a liquid‐crystalline (LC) polyester derived from a double‐substituted terephthalic acid. Films of all blends were subjected to stress‐strain measurements. A weak reinforcing effect was found for the poly(γ‐benzyl L‐glutamate)s, a somewhat stronger influence for the other polypeptides and the strongest effet for the LC‐polyesters 1.
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## Abstract Summary: FT‐IR microspectroscopy was used to map the compositional distribution along the cross‐section on the gradient films of fully biodegradable poly(ethylene oxide) (PEO)/poly(3‐hydroxybutyrate) (PHB) blend system. First, a linear fitting line for a calibration, related the absorba