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- W2001018484 abstract "Abstract Biodegradable poly(ester amide)s that contained phenylalanine residues in the main chains were synthesized by the polycondensation of di‐ p ‐nitrophenyl sebacate and phenylalanine 2‐aminoethyl ester. The stereoisomeric composition ( L / D ratio) of the phenylalanine residue in the monomer did not affect the yield and molecular weight of the polymer much. From the optical rotations of the polymers, it was found that the L / D ratio of the phenylalanine residue in the polymer was almost equal to the L / D ratio of the phenylalanine residue in the monomer. The biodegradability of the poly(ester amide)s was studied in aqueous solutions with proteases as catalysts. The polymer with 100% L ‐phenylalanine residue was effectively degraded by α‐chymotrypsin or subtilisins. However, the replacement of 10% L ‐phenylalanine with D ‐isomer resulted in a dramatic decrease in degradability. The polymers with less than 30% L ‐isomer were hardly degraded by the enzymes. Gel permeation chromatography studies suggested that the solubility of the degradation products in water greatly affected the rate and extent of biodegradation. © 2001 John Wiley & Sons, Inc. J Polym Sci Part A: Polym Chem 40: 385–392, 2002" @default.
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- W2001018484 date "2001-12-18" @default.
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- W2001018484 title "Synthesis and biodegradation of poly(ester amide)s containing amino acid residues: The effect of the stereoisomeric composition ofL- andD-phenylalanines on the enzymatic degradation of the polymers" @default.
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- W2001018484 doi "https://doi.org/10.1002/pola.10126" @default.
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