Synthesis and characterization of polyurethane-urea-amide based on functionalized polystyrene

Kayalvizhi, M.; Vakees, E.; Suresh, J.; Arun, A.

doi:10.1080/15685551.2015.1070505

Cited by 5 publications

(7 citation statements)

References 22 publications

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“…The Tg obtained at crosslinked samples which contain the same low DATA amount (DT2, DT5, DT6) is around −54 C. This emphasizes the strong influence of the DATA structure on the structure of the hard domain, through its volume and rigidity, as well as the importance of strong hydrogen bonds, which ensure a stronger ordering of the microphases. 39…”

Section: Resultsmentioning

confidence: 99%

The effects of the inclusion of 1,2,4-triazole derivatives into the main chains of the polyurethane urea exposed to UV radiation

Oprea¹,

Potolinca²

2021

High Performance Polymers

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Linear polyurethane urea containing 1,2,4-triazole segments was obtained by polyaddition of the 3,5-diamino-1,2,4-triazole (DATA) to urethane prepolymer. Also, three crosslinked polymers with different crosslinkers (2,4,6-triaminopyrimidine (TAP), glycerin (Gly), castor oil (CO)) were synthesized. Thermogravimetric analysis, of the obtained polymers, indicated good thermal stability up to 310°C. The polyurethane urea chemical structure was confirmed by FTIR analysis. The glass transition temperatures (Tg) of these polymers, measured by differential scanning calorimetry (DSC), were found in the range of −52°C to −56°C. These values were not significantly influenced by the structure of the hard domain and the intermolecular interactions. The tensile testing showed that the inclusion of 1,2,4-triazole in polyurethane structure substantially improves the tensile strength up to 58 MPa. The obtained polyurethane urea presents surface slight hydrophobic and low interfacial tension. The positive effect of the 1,2,4-triazole segment from the polymer main chain in the UV aging process of these polymer materials has been studied. After exposure to UV radiation, few changes were observed in the molecular structure, in the surface morphology and the mechanical properties.

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Section: Resultsmentioning

confidence: 99%

The effects of the inclusion of 1,2,4-triazole derivatives into the main chains of the polyurethane urea exposed to UV radiation

Oprea¹,

Potolinca²

2021

High Performance Polymers

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“…The amorphous and crystalline amide peak height (h) are related by the factor “C” which is having the value of 2.4. 23…”

Section: Methodsmentioning

confidence: 99%

“…The inherent viscosity of the synthesized polymer at a strength of 0.1 dL/g in a 1:1 molar solution of phenol/1,1,2,2-tetrachloroethane is found at 25°C by capillary Ubbelohde by adopting the known procedure. 23…”

Section: Methodsmentioning

confidence: 99%

“…24 Similar specimen is prepared and used for recording FT-IR at different temperature using the Alpha Bruker instrument connected with alpha-T at 30-120 C. The degree of crystallinity found out by using the known procedure. 23 Xc ¼…”

Section: Ft-ir Spectramentioning

confidence: 99%

“…A carbonyl group of the hydrogen bonded urethane stretching appears at 1735 cm À1 and utmost intensity also observed in this region due to loss of electron density for the formation of hydrogen bonds. 15,23 The peak around 1745 cm À1 is corresponds to non-bonded urethane carbonyl stretching. The stretching at 1710 cm À1 and at 1660-1690 cm À1 corresponds to amorphous amide carbonyl and hydrogen bonded urea carbonyl.…”

Section: Ft-ir Spectramentioning

confidence: 99%

See 2 more Smart Citations

Polyurethane-urea-amide-based triblock copolymer contains functionalized polystyrene: Synthesis, characterization and solvent resistivity study

Balaji

Suresh

Shunmugavelu

et al. 2021

Journal of Thermoplastic Composite Materials

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Synthesized polystyrene (PSt) with a molecular weight of 2100 g/mol, hexamethylene diisocyanate (HMDI), 6-hexylamino benzamide (6B), and N1-(6-aminohexyl)-N4-(6-benzoylaminohexyl)terephthalamide (6T6B) are used to make a copolymer of thermoplastic elastomers. The prepared polymers’ inherent viscosity results (0.4–1.1 dL/g) support the polymer’s high mass. The presence of a monodentate urea group in the polymer chain is confirmed by FT-IR tests. The temperature dependence of FT-IR confirms that the synthesized copolymer has a space length dependent reversible crystallinity. Data from differential scanning calorimetry (DSC) also shows that the hard segment crystallization is strong and reversible in nature. The XRD results show that the polymer is semi-crystalline. The TGA analysis confirmed that the synthesized copolymers are thermally stable up to 290°C. The presence of hydrogen bonds in polymer chains is thermally reversible. The polymer’s solvent resistivity is excellent due to its high crystallinity.

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Synthesis and characterization of a biopolymer of glycerol and macadamia oil

Pires

Alarcon

Gaglieri

et al. 2018

J Therm Anal Calorim

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Synthesis and characterization of polyurethane-urea-amide based on functionalized polystyrene

Cited by 5 publications

References 22 publications

The effects of the inclusion of 1,2,4-triazole derivatives into the main chains of the polyurethane urea exposed to UV radiation

The effects of the inclusion of 1,2,4-triazole derivatives into the main chains of the polyurethane urea exposed to UV radiation

Polyurethane-urea-amide-based triblock copolymer contains functionalized polystyrene: Synthesis, characterization and solvent resistivity study

Synthesis and characterization of a biopolymer of glycerol and macadamia oil

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