TY  - JOUR
A1  - Luxenhofer, Robert
A1  - Fetsch, Corinna
T1  - Thermal Properties of Aliphatic Polypeptoids
T2  - Polymers
N2  - 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 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.
KW  - peptoid
KW  - biomaterials
KW  - glass transition temperature
KW  - DSC
KW  - TGA
KW  - XRD
Y1  - 2013
UR  - https://opus.bibliothek.uni-wuerzburg.de/frontdoor/index/index/docId/9633
UR  - https://nbn-resolving.org/urn:nbn:de:bvb:20-opus-96333
ER  -