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Homo and Block Copolymers of Poly(β-benzyl-L-aspartate)s and Poly(γ-benzyl-L-glutamate)s of Different Architectures

✍ Scribed by Blaž Brulc; Ema Žagar; Mariusz Gadzinowski; Stanisław Słomkowski; Majda Žigon

Publisher
John Wiley and Sons
Year
2011
Tongue
English
Weight
786 KB
Volume
212
Category
Article
ISSN
1022-1352

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✦ Synopsis

Abstract

Homopolypeptides of linear and star‐like architectures were prepared by polymerizing benzylic‐protected L‐glutamic acid and L‐aspartic acid N‐carboxyanhydrides (Glu NCA, Asp NCA) in DMF. The polymerization rate of the Glu NCA is faster than that of Asp NCA. Using a simple monoamino initiator, its hydrochloride, di‐, tri‐, and tetraamino functional initiators, homopolypeptides with well‐defined structures and molar masses were obtained. The molar‐mass averages of the poly(γ‐benzyl‐L‐glutamate)s lie very close to calculated values, according to the initial [M]:[I] ratios, while those of the linear poly(β‐benzyl‐L‐aspartate)s were lower than the predicted ones. PBAs had somewhat broader molar‐mass distributions than PBGs.
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