Preparation and Properties of Frost-Resistant Room-Temperature-Curable Compounds Based on Oligoethertetraurethane Diepoxides of Various Chemical Structures

Frost-Resistant Epoxy-Urethane Binders Containing Diglycidyl Urethane

“…The band at 1702 cm -1 refers to the carbonyl bonded by the hydrogen bond to the NH group of the urethane hydroxyl hard block. The peak at 1730 cm -1 is related to the absorption of free carbonyl of the urethane group [18]. It should be noted that the intensity of the peak at 1730 cm -1 of the PUE-1 sample is higher than that of the sample of the PUE-6 (based on IFDA), which indicates a higher level of interchain interaction in the polymers cured by AEP.…”

“…In authors' opinion, the solution to the problem of developing a frost-resistant elastic material with high mechanical characteristics lies in the field of the use of polyetherurethane epoxides. Their glass transition temperature can be lowered below -70°C, but they have a much higher level of interchain interaction that can lead to better strength properties compared to polydieneurethane epoxides [18].…”

Preparation, Structure and Properties of Urethane-Containing Elastomers Based on Epoxy Terminal Oligomers

“…The band at 1730 cm −1 appears in the spectra of the samples, synthesized from 2,4-toluene diisocyanate and aminoethylpiperazine ( Figure 7 a), due to the absorption of carbonyl in free urethane groups. It can be assigned to the hard segments dissolved in the soft phase [ 28 ]. As expected, the intensity of this absorption band increases with the molecular weight of the polyester soft segment.…”

“…For the elastomers with hard urethane hydroxyl segments based on isophorone diisocyanate, the absorption band characteristic for the microphase separation is observed in the range of 1695–1698 cm −1 [ 28 ]. In Figure 8 a,b the FTIR spectra sections are presented for the elastomers prepared using isophorone diisocyanate and cured with aminoethylpiperazine ( Figure 8 a) or isophorone diamine ( Figure 8 b).…”

Synthesis and Study of Physical and Mechanical Properties of Urethane-Containing Elastomers Based on Epoxyurethane Oligomers with Controlled Crystallinity

“…The analysis of the FTIR spectra in the range of carbonyl stretching vibrations (1600–1760 cm –1 ) reveals the important features of the structural organization of the synthesized elastomers. It is known that the microphase separation of soft and hard segments of elastomers with urethane hydroxyl hard blocks is characterized by an absorption band at 1695 cm −1 when using isophorone diisocyanate and 1705 cm −1 when using 2,4-toluene diisocyanate [ 43 ].…”