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Title: New star-shaped polyether-pentols (PEPOs) for fabrication of crosslinked Polyurethanes-synthesis and characterization
Authors: Jurek-Suliga, Justyna
Grobelny, Zbigniew
Golba, Sylwia
Okła, Hubert
Bednarczyk, Katarzyna
Keywords: polymer synthesis; molecular engineering; ROP; oxiranes anionic polymerization; potassium hydroxyalkoxides; macropentols
Issue Date: 2021
Citation: "Polymers" 2021, iss. 13, art. no. 2150
Abstract: Polyether-pentols (PEPOs) were synthesized from glycidyl ethers and butylene oxide with the application of tripotassium salts of 2,2,6,6-tetrakis(hydroxymethyl)cyclohexanol (HMCH) activated 18C6 for ring-opening polymerization (ROP). The construction of the applied initiator system reflects the ability of crown ether to influence the degree of ion-pair separation with an increased activating effect. As a result formation of bi- or trimodal polymers was observed with molar masses in the range of (Mn = 1200–6000). The observed multi-fraction composition is prescribed to the formation of ionic aggregates with different reactivities during polymerization. The mechanism of the studied processes is discussed. The obtained PEPOs served for a crosslinked PUR synthesis, for which the hydrogen bond index for coupling of hard segments was calculated. Additionally, the range of phase separation was calculated that was higher for PUR-containing aromatic rings as the substituent.
DOI: 10.3390/polym13132150
ISSN: 2073-4360
Appears in Collections:Artykuły (WNŚiT)

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