Synthesis and structure-property relationships of biodegradable polyurethanes

Pergal, Marija V.; Blaban, Milica

doi:10.5599/obp.14.6

Cited by 2 publications

(1 citation statement)

References 207 publications

(256 reference statements)

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“…As a pigment grinding medium, the phosphate PU acrylics were shown to be well-suited for this function because of their sheer stability [79]. It has been stated that there may be improved cracking when steroids were adsorbed on PUs [80]. Looking at drying time, PU resin-coated panels were tested for four different properties, which were scratch hardness, impact hardness, flexibility, and chemical barrier [81].…”

Section: Mechanical Properties Of Nanofiller-tpu Nanocompositesmentioning

confidence: 99%

Investigating Physio-Thermo-Mechanical Properties of Polyurethane and Thermoplastics Nanocomposite in Various Applications

et al. 2021

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The effect of the soft and hard polyurethane (PU) segments caused by the hydrogen link in phase-separation kinetics was studied to investigate the morphological annealing of PU and thermoplastic polyurethane (TPU). The significance of the segmented PUs is to achieve enough stability for further applications in biomedical and environmental fields. In addition, other research focuses on widening the plastic features and adjusting the PU–polyimide ratio to create elastomer of the poly(urethane-imide). Regarding TPU- and PU-nanocomposite, numerous studies investigated the incorporation of inorganic nanofillers such as carbon or clay to incorporating TPU-nanocomposite in several applications. Additionally, the complete exfoliation was observed up to 5% and 3% of TPU–clay modified with 12 amino lauric acid and benzidine, respectively. PU-nanocomposite of 5 wt.% Cloisite®30B showed an increase in modulus and tensile strength by 110% and 160%, respectively. However, the nanocomposite PU-0.5 wt.% Carbone Nanotubes (CNTs) show an increase in the tensile modulus by 30% to 90% for blown and flat films, respectively. Coating PU influences stress-strain behavior because of the interaction between the soft segment and physical crosslinkers. The thermophysical properties of the TPU matrix have shown two glass transition temperatures (Tg’s) corresponding to the soft and the hard segment. Adding a small amount of tethered clay shifts Tg for both segments by 44 °C and 13 °C, respectively, while adding clay from 1 to 5 wt.% results in increasing the thermal stability of TPU composite from 12 to 34 °C, respectively. The differential scanning calorimetry (DSC) was used to investigate the phase structure of PU dispersion, showing an increase in thermal stability, solubility, and flexibility. Regarding the electrical properties, the maximum piezoresistivity (10 S/m) of 7.4 wt.% MWCNT was enhanced by 92.92%. The chemical structure of the PU–CNT composite has shown a degree of agglomeration under disruption of the sp2 carbon structure. However, with extended graphene loading to 5.7 wt.%, piezoresistivity could hit 10-1 S/m, less than 100 times that of PU. In addition to electrical properties, the acoustic behavior of MWCNT (0.35 wt.%)/SiO2 (0.2 wt.%)/PU has shown sound absorption of 80 dB compared to the PU foam sample. Other nanofillers, such as SiO2, TiO2, ZnO, Al2O3, were studied showing an improvement in the thermal stability of the polymer and enhancing scratch and abrasion resistance.

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Section: Mechanical Properties Of Nanofiller-tpu Nanocompositesmentioning

confidence: 99%

Investigating Physio-Thermo-Mechanical Properties of Polyurethane and Thermoplastics Nanocomposite in Various Applications

et al. 2021

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Biological Applications of Biosilica/Silk Fibroin/Polyurethane (1:3:1) Composite

et al. 2022

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High availability and several benefits of biosilica (BS) in various industries, it becomes a desirable material for industrial purposes. This study is focused to prepare a biocomposite of biosilica isolated from sugarcane baggase and combined with silk fibroin (SF) and polyurethane (PUF) foam. FTIR, XRD, TGA, DSC and SEM measurements were used to characterize the synthesized BS/SF/PUF biocomposite. The potentiality of biosilica composite as an antimicrobial support material was investigated. The BS/SF/PUF biocomposite has a rough surface nature, amorphous and higher thermal stability due to strong contacts, according to the characterization data. Furthermore, the results revealed that the produced material exhibited excellent antioxidant and antimicrobial properties.

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Synthesis and structure-property relationships of biodegradable polyurethanes

Cited by 2 publications

References 207 publications

Investigating Physio-Thermo-Mechanical Properties of Polyurethane and Thermoplastics Nanocomposite in Various Applications

Investigating Physio-Thermo-Mechanical Properties of Polyurethane and Thermoplastics Nanocomposite in Various Applications

Biological Applications of Biosilica/Silk Fibroin/Polyurethane (1:3:1) Composite

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