Thermal Properties of Aliphatic Polypeptoids

Please always quote using this URN: urn:nbn:de:bvb:20-opus-96333
  • A series of polypeptoid homopolymers bearing short (C1–C5) side chains of degrees of polymerization of 10–100 are studied with respect to thermal stability, glass transition and melting points. Thermogravimetric analysis of polypeptoids suggests stability to >200 °C. The study of the glass transition temperatures by differential scanning calorimetry revealed two dependencies. On the one hand an extension of the side chain by constant degree of polymerization decrease the glass transition temperatures (Tg) and on the other hand a raise of theA series of polypeptoid homopolymers bearing short (C1–C5) side chains of degrees of polymerization of 10–100 are studied with respect to thermal stability, glass transition and melting points. Thermogravimetric analysis of polypeptoids suggests stability to >200 °C. The study of the glass transition temperatures by differential scanning calorimetry revealed two dependencies. On the one hand an extension of the side chain by constant degree of polymerization decrease the glass transition temperatures (Tg) and on the other hand a raise of the degree of polymerization by constant side chain length leads to an increase of the Tg to a constant value. Melting points were observed for polypeptoids with a side chain comprising not less than three methyl carbon atoms. X-ray diffraction of polysarcosine and poly(N-ethylglycine) corroborates the observed lack of melting points and thus, their amorphous nature. Diffractograms of the other investigated polypeptoids imply that crystalline domains exist in the polymer powder.show moreshow less

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Metadaten
Author: Robert Luxenhofer, Corinna Fetsch
URN:urn:nbn:de:bvb:20-opus-96333
Document Type:Journal article
Faculties:Fakultät für Chemie und Pharmazie / Institut für Funktionsmaterialien und Biofabrikation
Language:English
Parent Title (English):Polymers
Year of Completion:2013
Source:In: Polymers (2013) 5, 112-127, doi:10.3390/polym5010112
DOI:https://doi.org/10.3390/polym5010112
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 54 Chemie / 540 Chemie und zugeordnete Wissenschaften
Tag:DSC; TGA; XRD; biomaterials; glass transition temperature; peptoid
Release Date:2014/04/29
Collections:Open-Access-Publikationsfonds / Förderzeitraum 2013
Licence (German):License LogoCC BY: Creative-Commons-Lizenz: Namensnennung