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New thermoplastic elastomers by incorporation of nonpolar soft segments in PET-based copolyesters

Titelangaben

Schmalz, Holger ; Abetz, Volker ; Lange, Ronald ; Soliman, Maria:
New thermoplastic elastomers by incorporation of nonpolar soft segments in PET-based copolyesters.
In: Macromolecules. Bd. 34 (2001) Heft 4 . - S. 795-800.
ISSN 1520-5835
DOI: https://doi.org/10.1021/ma001226p

Volltext

Link zum Volltext (externe URL): Volltext

Abstract

The incorporation of hydroxy-functionalized hydrogenated polybutadienes (HO-PEB-OH, KRATON liquid polymer) into PET-based copolyesters by a conventional two-step melt polycondensation procedure is described. The usually occurring macrophase separation with nonpolar soft segments is avoided by chain extension of HO-PEB-OH with ethylene oxide to yield the corresponding hydroxy-terminated PEO-PEB-PEO triblock copolymers. Several PEO-PEB-PEO triblock copolymers with different PEO block lengths have been synthesized by means of anionic synthesis and incorporated into PET-based copolyesters with varying PET content. We show that the chain extension of HO-PEB-OH with ethylene oxide compatibilizes the nonpolar KEATON with the polar reactants 1,4-butanediol and dimethyl terephthalate during melt polycondensation, leading to a complete incorporation of the triblock copolymer into the copolyester. Morphological studies using SFM as well as mechanical testing show that the morphology is strongly influenced by the soft segment leading to dispersed PET crystallites in a matrix of the soft phase. Thermal characterization of the synthesized copolyesters by DSC exhibits a low glass transition temperature and a high PET melting point even at high soft segment contents, making these materials suitable for low- and high-temperature range applications.

Weitere Angaben

Publikationsform: Artikel in einer Zeitschrift
Begutachteter Beitrag: Ja
Zusätzliche Informationen: ISI:000166858700021
Keywords: BLOCK-COPOLYMERS
Institutionen der Universität: Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Chemie > Lehrstuhl Makromolekulare Chemie II
Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Chemie > Lehrstuhl Makromolekulare Chemie II > Lehrstuhl Makromolekulare Chemie II - Univ.-Prof. Dr. Andreas Greiner
Profilfelder > Advanced Fields > Polymer- und Kolloidforschung
Fakultäten
Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften
Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Chemie
Profilfelder
Profilfelder > Advanced Fields
Titel an der UBT entstanden: Ja
Themengebiete aus DDC: 500 Naturwissenschaften und Mathematik > 540 Chemie
Eingestellt am: 16 Apr 2015 08:32
Letzte Änderung: 28 Jul 2023 09:23
URI: https://eref.uni-bayreuth.de/id/eprint/10419