Titlebar

Export bibliographic data
Literature by the same author
plus on the publication server
plus at Google Scholar

 

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

Title data

Schmalz, Holger ; Abetz, Volker ; Lange, Ronald ; Soliman, Maria:
New thermoplastic elastomers by incorporation of nonpolar soft segments in PET-based copolyesters.
In: Macromolecules. Vol. 34 (13 February 2001) Issue 4 . - pp. 795-800.
ISSN 0024-9297
DOI: https://doi.org/10.1021/ma001226p

Official URL: Volltext

Abstract in another language

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.

Further data

Item Type: Article in a journal
Refereed: Yes
Additional notes: ISI:000166858700021
Keywords: BLOCK-COPOLYMERS
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Macromolecular Chemistry II
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Macromolecular Chemistry II > Chair Macromolecular Chemistry II - Univ.-Prof. Dr. Andreas Greiner
Profile Fields > Advanced Fields > Polymer and Colloid Science
Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry
Profile Fields
Profile Fields > Advanced Fields
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 540 Chemistry
Date Deposited: 16 Apr 2015 08:32
Last Modified: 16 Apr 2015 08:32
URI: https://eref.uni-bayreuth.de/id/eprint/10419