Characterisation of ureaurethane elastomers containing tall oil based polyols

Mizera, Kamila; Kirpļuks, Miķelis; Cābulis, Uģis; Leszczyńska, Milena; Półka, Marzena; Ryszkowska, Joanna

doi:10.1016/j.indcrop.2018.01.019

Cited by 15 publications

(19 citation statements)

References 46 publications

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“…For the EPUUs annealed at 110 °C E ′ −30 increases for E_10%RO_110 to 12.55 GPa and decreases with an increase of RO polyol content. The increase of E ′ at a temperature of −30 °C is the effect of the movement of the polymer chains next to each other . The E ′ 20 (above the glass transition temperature T g ) increases with increase in RO polyol content (Table ).…”

Section: Resultsmentioning

confidence: 97%

“…The interpretation of the FTIR spectra of the tested EPUUs shows signals in the range 3349–3342 cm −1 , which are the result of symmetric and asymmetric stretching vibrations of the N–H groups present in the urea and urethane derivatives . This bond is involved in the formation of hydrogen bonds . The signals at 2960–2953 cm −1 and 2874–2872 cm −1 correspond to symmetric and asymmetric CH 2 stretching vibrations, respectively.…”

Section: Resultsmentioning

confidence: 98%

“…The EPUUs were produced by a one‐step method with isocyanate index ( I NCO ) equal to 1.07, with a molar ratio PEA:MDI:DYDI = 1:2:1. The content of hard segments in the tested EPUUs was calculated to be 20–24 wt%.…”

Section: Methodsmentioning

confidence: 99%

“…Polyether or polyester composes the soft segment domains, and the diisocyanate linked with the chain extenders composes the hard segments in the hard domains . The segmented structure of EPUUs is the main reason for their excellent properties: good resistance to abrasion and to oils, grease as well as to weather conditions . Thanks to these properties they are used in many technical applications such as furniture, medical devices and the footwear industry, coatings, adhesives, sealants and automotive parts .…”

Section: Introductionmentioning

confidence: 99%

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Production and characterization of ureaurethane elastomers with rapeseed‐based polyol

Mizera

Ryszkowska

Kurańska

et al. 2018

Polymer International

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The purpose of this study was to evaluate the effect of rapeseed‐oil‐based (RO) polyol on the thermal and mechanical properties of tested ureaurethane elastomers (EPUUs). The chemical structure and degree of phase separation connected to the value of hydrogen bonds were tested by infrared spectroscopy. Thermal degradation was examined by TGA. The glass transition temperature and the enthalpy of heat effects were analysed by DSC. The mechanical properties were tested by dynamic mechanical thermal analysis and static tensile strength. The physicomechanical properties were also examined, including wear resistance and hardness of the tested materials. The use of RO polyol in 10–40 wt% concentration in polyol premixes changed the chemical structure of the EPUUs indicating a change in the quantity of hydrogen bonds and the degree of phase separation. DSC analysis showed that addition of the RO polyol causes an increase in the glass transition temperature of the soft phase in the EPUUs. © 2018 Society of Chemical Industry

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Section: Resultsmentioning

confidence: 97%

Section: Resultsmentioning

confidence: 98%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Production and characterization of ureaurethane elastomers with rapeseed‐based polyol

Mizera

Ryszkowska

Kurańska

et al. 2018

Polymer International

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“…The tested velour bovine leather had the highest piloted-ignition value, which means that its susceptibility to ignition was the lowest in the tested conditions. Considering the HRRmax values of the tested materials in the analyzed thermal exposures, it can be seen that they were similar to the HRRmax of wood or wood-based materials, or some polyurethane foams, but they were definitely lower than the HRRmax of, for example, non-flame-retardant epoxy materials [31][32][33][34][35].…”

Section: Discussionmentioning

confidence: 99%

Leather Thermal and Environmental Parameters in Fire Conditions

Półka

2019

Sustainability

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The thermal decomposition of leather-product combustion produces some inflammable and harmful compounds after tanning, fat liquoring, dyeing, and finishing processes. These organic compounds are ignited and release a lot of toxic gases and smoke in fire conditions, polluting the atmosphere air. On this account, it is very important to know leather safety performance for fire prevention. The flammability and thermal stability of types of leather at thermal expositions stimulating fire conditions were analyzed. Five types of leather were used in experimental testing, four of animal origin and an artificial one. Results showed that, in the analyzed heat exposure, the highest average heat-release rate (174 kW/m2) and smoke generation, and the lowest temperature of the beginning of thermal decomposition, were recorded for the artificial leather. Leather flammability essentially depends on the type of applied energy stimulus, as well as hide composition and origin. A possible cause for differences in the obtained results of the leather analyses is the percentage of certain leather components and their chemical composition.

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The effect of rapeseed oil-based polyols on the thermal and mechanical properties of ureaurethane elastomers

et al. 2019

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Two types of rapeseed oil-based polyols in the content of 20 wt% and 50 wt% were used for synthesis of ureaurethane elastomers (EPUU) with isocyanate index 1.07. The bio-polyols were synthesized by epoxidation and opening of oxirane rings using isopropanol (RO) and diethylene glycol (MK). The aim of this work was to evaluate the impact of bio-polyols on the thermal and mechanical properties of the manufactured EPUUs, produced with poly(ethylene adipate) (PEA). Differences in the structure of used bio-polyols caused changes in the number of hydrogen bonds and degree of phase separation in EPUUs. As the content of bio-polyols increases, the number of hydrogen bonds connecting the rigid segments of these materials is reduced. The consequence of these changes is variation in the thermal characteristics of these materials. Cross-linking density calculated from dynamical mechanical thermal analysis increases for materials with 20% of both types of rapeseed oilbased polyols and is the highest for material 80PEA/20MK. An introduction of the MK polyol also resulted in an increase in the elongation at break of the modified elastomers.

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Characterisation of ureaurethane elastomers containing tall oil based polyols

Cited by 15 publications

References 46 publications

Production and characterization of ureaurethane elastomers with rapeseed‐based polyol

Production and characterization of ureaurethane elastomers with rapeseed‐based polyol

Leather Thermal and Environmental Parameters in Fire Conditions

The effect of rapeseed oil-based polyols on the thermal and mechanical properties of ureaurethane elastomers

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