Thermoplastic polyurethanes derived from petrochemical or renewable resources: A comprehensive review

Datta, Janusz; Kasprzyk, Paulina

doi:10.1002/pen.24633

Cited by 115 publications

(99 citation statements)

References 112 publications

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“…Thermal decomposition temperature ( T d ) of TPUs was measured using TGA. The thermal degradation of TPUs started at about 238‑287 °C depending on the structure and carbon chain length of diols (Table ), initiated by decomposition of urethane groups . Thermal decomposition of SS is initiated by a random scission of the ester linkage at around 360‑386 °C.…”

Section: Resultsmentioning

confidence: 99%

“…The thermal degradation of TPUs started at about 238‑287 °C depending on the structure and carbon chain length of diols (Table ), initiated by decomposition of urethane groups . Thermal decomposition of SS is initiated by a random scission of the ester linkage at around 360‑386 °C. It was observed that higher T d in TPUs made from crystalline azelate polyols than amorphous azelate polyols.…”

Section: Resultsmentioning

confidence: 99%

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Thermal and mechanical properties of thermoplastic urethanes made from crystalline and amorphous azelate polyols

Ismail

Ibrahim

Sendijarević³

et al. 2019

J of Applied Polymer Sci

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Polyester polyols from renewable resources have gained significant interest in the field of polyurethane chemistry. Two sets of segmented TPUs were prepared from crystalline and amorphous azelate polyols, 4,4′‐methylenebis(phenyl isocyanate), and 1,4‐butanediol as a chain extender at a mole ratio of 1:2:1, respectively. Bio‐1,3‐propanediol (1,3‐PDO) and 1,5‐pentanediol (PTDO) were used to prepare crystalline azelate polyols, while 1,2‐propanediol (1,2‐PDO) and 2,2′‐dimethyl‐1,3‐propanediol (NPG) were used to prepare amorphous azelate polyols. All TPUs displayed clear glass transition temperatures (T gs) in between −36 and − 24 °C, associated with azelate polyols soft segments, which are decreasing with increasing diols chain lengths in azelate polyols. TPUs based on crystalline azelate polyols exhibited higher mechanical properties and better heat resistance in comparison to their counter parts. Besides, TPU based on 1,3‐PDO azelate showed lower percentage of hysteresis indicating lower heat build‐up. This is essentially good for TPUs that are to be used in dynamic applications such as rollers and wheels. Hence, the study on structure–property correlation of the crystalline and amorphous azelate polyols and their effect on TPUs properties suggest that crystalline azelate polyols are suitable for dynamic application of TPU, and amorphous azelate polyols are suitable for coatings and adhesives applications. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47890.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Thermal and mechanical properties of thermoplastic urethanes made from crystalline and amorphous azelate polyols

Ismail

Ibrahim

Sendijarević³

et al. 2019

J of Applied Polymer Sci

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“…When the material is heated beyond the melt temperature of the hard segments, a homogeneous viscous melt would be created and the microphase separation structure disappears. After cooling, the domain structure can be reconstructed …”

Section: Introductionmentioning

confidence: 99%

Microstructure and tensile properties of injection molded thermoplastic polyurethane with different melt temperatures

Xiang

Zhang

Zheng

et al. 2020

J of Applied Polymer Sci

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The use of injection molding technology to prepare heterogeneous interlayer film of laminated glass holds strong applicable potential. This article aims to investigate the effects of melt temperature and melt flow on the microstructure evolution and tensile properties of thermoplastic polyurethane (TPU) specimens during the injection molding process. The tensile properties of the TPU specimens show dependency on the melt temperature and melt flow direction. The results of birefringence indicate that melt flow and lower melt temperature induce higher stretching deformation of the molecular chain network. Small-angle X-ray scattering analysis approves that besides the melt temperature and flow direction, the testing position on the cross section of the specimen has great influence on the microstructure of the TPU sheet. Further analysis and conclusions can be made using wide-angle X-ray scattering method. The above results demonstrate that both the tensile properties and microstructure of the injection molded TPU specimens tend to be isotropic with the increase of melt temperature.

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“…TPUs are synthesized in the reaction of diisocyanate with a polyol . These materials can be synthesized by two different methods.…”

Section: Introductionmentioning

confidence: 99%

“…At the beginning, the prepolymer is prepared via the reaction of an oligomer with diisocyanate. In the second step, the prepolymer reacts with a chain extender, for example, short, organic diols, or diamines . TPUs consist of hard segments (HSs) and soft segments (SSs).…”

Section: Introductionmentioning

confidence: 99%

Effect of molar ratio [NCO]/[OH] groups during prepolymer chains extending step on the morphology and selected mechanical properties of final bio‐based thermoplastic poly(ether‐urethane) materials

Kasprzyk

Datta

2018

Polymer Engineering & Sci

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The main aim of this work was to investigate the effect of [NCO]/[OH] molar ratio used during the prepolymer chain extending step (with bio‐based diols) on the chemical structure, and thermomechanical and mechanical properties of thermoplastic poly(ether‐urethane)s. Thermoplastic poly(ether‐urethane)s were obtained from bio‐based polyol (polytrimethylene ether glycol), bio‐based glycol (1,4‐butanediol or 1,3‐propanediol), and 4,4'diphenylmethane diisocyanate via a prepolymer route. In the first step, the prepolymer was synthesized from a polyol and diisocyanate. In the second step, the prepared prepolymer terminated with isocyanate group had been extended by using bio‐glycol at three different [NCO]/[OH] molar ratios, namely, 0.9, 0.95, and 1.0. The chemical structure was analyzed using Fourier transform infrared spectroscopy. The Gaussian deconvolution technique was used to study the hydrogen bonding as well as to decompose carbonyl region of three peaks in various TPUs. It has been confirmed that the glycol type and [NCO]/[OH] molar ratio have an effect on the degree of phase separation, and thermomechanical and mechanical properties of resulting materials. It was also observed that the degree of microphase separation increased with increasing content of 1,3‐propanediol used as a chain extender. Materials with the highest [NCO]/[OH] ratio showed the most favorable mechanical properties. POLYM. ENG. SCI., 58:E199–E206, 2018. © 2018 Society of Plastics Engineers

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Thermoplastic polyurethanes derived from petrochemical or renewable resources: A comprehensive review

Cited by 115 publications

References 112 publications

Thermal and mechanical properties of thermoplastic urethanes made from crystalline and amorphous azelate polyols

Thermal and mechanical properties of thermoplastic urethanes made from crystalline and amorphous azelate polyols

Microstructure and tensile properties of injection molded thermoplastic polyurethane with different melt temperatures

Effect of molar ratio [NCO]/[OH] groups during prepolymer chains extending step on the morphology and selected mechanical properties of final bio‐based thermoplastic poly(ether‐urethane) materials

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