Thermal Analysis of Polyurethane Dispersions Based on Different Polyols

Cakić, Suzana; Ristić, Ivan; Ristić, Olivera Z.

doi:10.5772/35800

Cited by 8 publications

(4 citation statements)

References 39 publications

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“…The degree of phase separation, as well as the concentration of the hard segments, are contributing factors to the properties of PU. 49 Therefore, the results obtained in GPC and DMA analysis suggest that the structure of polyurethane, i.e. distribution and separation of so and hard segment/phases have not been modied by changing the NMP cosolvent by the two green solvents studied.…”

Section: Resultsmentioning

confidence: 90%

Green alternative cosolvents to N-methyl-2-pyrrolidone in water polyurethane dispersions

et al. 2021

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Section: Resultsmentioning

confidence: 90%

Green alternative cosolvents to N-methyl-2-pyrrolidone in water polyurethane dispersions

et al. 2021

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“…The rst, initial weight loss (5 wt %) for HTPU and Zn(II)-HTPU 300 was observed at a range of 50-180 °C (Centred at 105 o C) correlates with the evaporation of entrapped moisture/solvent molecules [45]. The second weight loss (5-15 wt %) at 180-255 °C (Centred at 222 o C) in both cases, can be due to the urethane linkage scission to their components, isocyanate, and hydroxyl components 34 along with further decomposition of hydroxyl components [46].…”

Section: Thermal Studiesmentioning

confidence: 94%

Transition Metal-Ions Incorporated PEG300 and TDI Based Hydroxy-Terminated Polyurethanes

Laxmi¹,

Shahzaib²,

Khan³

et al. 2021

Preprint

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Present work reports the synthesis of polyethylene glycol, PEG 300 (soft segment) and toluene 2,4-diisocyanate, TDI (hard segment) based hydroxy-terminated polyurethane ligands (HTPU300) for the first time to the best of our knowledge. The effect of 3d transition metal ions with different 3d electrons within HTPU (M(II)-HTPU300, M= Mn, Co, Ni, and Zn) was evaluated by their physical and antibacterial studies of the final complex polymeric unit. M(II) HTPU300 and was conveniently synthesized in appreciable yields following a facile and one-pot addition polymerization reaction scheme. Foremost the thermal stability of all the M(II)-HTPU300 polymeric materials were evaluated using TGA, DSC, and IPDT calculations. FTIR technique was used to ascertain the structure of M(II)-HTPU300, while SEM/EDX and XRD techniques were used to study their morphology, elemental analysis, and crystalline nature of the material, respectively. Further, the in-vitro antimicrobial activity of the PU was investigated against gram-positive (Staphylococcus aureus, Bacillus subtilis) and gram-negative (Escherichia coli and Pseudomonas aeruginosa) bacterial strains. The comparatively moderate efficacy against bacterial stain supports the possible application of such PU as thermally stable bacterial resistant materials constructed out of degradable PEG.

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“…, IPDI, since the degradation products of IPDI-based PUs showed lower toxicity than those from the degradation products of aromatic diisocyanate-based PUs. 89 The obtained PU had a density of 95–122 kg m −3 , high porosity (89–90%), 35–2165 μm pore sizes (interconnected micro and macropore), compression stress of 48–55 kPa, and 59–78 kPa tensile strength. Moreover, the PU with 1.0 isocyanate index exhibited a slight cytotoxicity effect after incubation for 24 h and showed cell proliferation on the PU surface.…”

Section: Polyurethanes (Pus)mentioning

confidence: 96%