Author(s):
1. Milica Balaban, Prirodno-matematički fakultet Banja Luka, Republic of Srpska, Bosnia and Herzegovina
2. Silvester Bolka, Fakultet za tehnologiju polimera , Slovenia
3. Vesna Antić, Univerzitet u Beogradu, Poljoprivredni fakultet, Serbia

Abstract:
Telechelic poly(dimethylsiloxane) oligomers are usually synthesised by siloxane equilibration reaction at relatively high temperatures. In present paper a series of α,ω–dihydroxybutyl-poly(dimethyl siloxane)s (PDMS) of the controlled molecular weight was synthesized in the presence of a cation-exchange resin as the heterogeneous catalyst. Influence of the reaction temperature on the molecular weight of the PDMS oligomers was investigated by 1H NMR spectroscopy, thermogravimetric analysis - infrared spectroscopy (TG-FTIR) and dilute solution viscometry. The results showed that performing the reaction at low temperature allowed complete control of the molecular weight of the synthesized oligomers.

Key words:
hydroxybutyl-terminated PDMS, siloxane equilibration reaction, 1H NMR spectroscopy

Thematic field:
SYMPOSIUM A - Science of matter, condensed matter and physics of solid states

Date of abstract submission:
26.07.2018.

Conference:
Contemporary Materials 2018 - Savremeni Materijali