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Title: Linking two worlds in polymer chemistry: The influence of block uniformity and dispersity in amphiphilic block copolypeptoids on their self‐assembly

Journal Article · · Biopolymers
DOI: https://doi.org/10.1002/bip.23259 · OSTI ID:1493863
ORCiD logo [1];  [1];  [2];  [3];  [3];  [4];  [4];  [3];  [2]; ORCiD logo [5]; ORCiD logo [6]
  1. Lehrstuhl für Chemische Technologie der Materialsynthese Universität Würzburg Würzburg Germany
  2. Institut für Organische Chemie &, Center for Nanosystems Chemistry (CNC) Universität Würzburg Würzburg Germany, Bavarian Polymer Institute (BPI) Universität Würzburg Würzburg Germany
  3. Lehrstuhl für Röntgenmikroskopie Universität Würzburg Würzburg Germany
  4. Lehrstuhl für Tissue Engineering und Regenerative Medizin Universitätsklinikum Würzburg Würzburg Germany
  5. Molecular Foundry, Biological Nanostructures, Lawrence Berkeley National Laboratory United States of America
  6. Lehrstuhl für Chemische Technologie der Materialsynthese Universität Würzburg Würzburg Germany, Bavarian Polymer Institute (BPI) Universität Würzburg Würzburg Germany

Abstract The self‐assembly of block copolymers has captured the interest of scientists for many decades because it can induce ordered structures and help to imitate complex structures found in nature. In contrast to proteins, nature's most functional hierarchical structures, conventional polymers are disperse in their length distribution. Here, we synthesized hydrophilic and hydrophobic polypeptoids via solid‐phase synthesis (uniform) and ring‐opening polymerization (disperse). Differential scanning calorimetry measurements showed that the uniform hydrophobic peptoids converge to a maximum of the melting temperature at a much lower chain length than their disperse analogs, showing that not only the chain length but also the dispersity has a considerable impact on the thermal properties of those homopolymers. These homopolymers were then coupled to yield amphiphilic block copolypeptoids. SAXS and AFM measurements confirm that the dispersity plays a major role in microphase separation of these macromolecules, and it appears that uniform hydrophobic blocks form more ordered structures.

Sponsoring Organization:
USDOE
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
1493863
Journal Information:
Biopolymers, Journal Name: Biopolymers Journal Issue: 4 Vol. 110; ISSN 0006-3525
Publisher:
Wiley Blackwell (John Wiley & Sons)Copyright Statement
Country of Publication:
United States
Language:
English

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