Structure–property relationship of sodium deoxycholate based poly(ester ether)urethane ionomers for biomedical applications

Filip, Daniela; Macocinschi, Doina; Vlad, Stelian; Lisă, Gabriela; Cristea, Mariana; Zaltariov, Mirela F.

doi:10.1002/app.42921

Cited by 12 publications

(12 citation statements)

References 44 publications

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“…For P2, P3 polyurethanes the secondary relaxation peaks are much broader than for P1, P4 polyurethanes being interpreted by a distribution of relaxation times. This result can be explained with the more homogeneous polyurethane networks of P1, P4 in comparison with those of P2, P3 as demonstrated by our previous DMTA results [15].…”

Section: Deta Analysismentioning

confidence: 56%

“…The molecular dynamics in connection with glass transition or a process are cooperative segmental dynamics. The secondary b relaxation can be assigned to the local motions of polar urethane groups whereas the secondary b 0 relaxation can be assigned to the movements of cyclohexyl ring and the secondary c relaxation is assigned to the movements of the methylene sequences in soft segments of the polyurethane ionomers [15,20,21].…”

Section: Deta Analysismentioning

confidence: 99%

“…Rigid polyurethanes evidence larger R g values than semi rigid polyurethanes [28]. The highest R g value is shown by polyurethane P3 due to its more crystalline PEO segment and highest molecular weight which can be correlated with its highest value of storage modulus, E 0 [15]. A Guinier-Porod empirical model was used by employing Igor Pro software [29].…”

Section: Saxs Analysismentioning

confidence: 99%

“…The reaction continued for 2 h. The resulting polyurethanes were precipitated in water and dried under vacuum for several days. Synthesis and characterization of present polyurethanes are presented in [15,16]. The general scheme of chemical structures of studied polyurethane ionomers is presented in Scheme 1.…”

Section: Experimental Part Materialsmentioning

confidence: 99%

“…Sodium deoxycholate as low molar mass chain extender is used to prepare the herein presented polyurethane ionomers [15,16]. Conductivity, molecular dynamics, chain packing, conformation, supramolecular organization and the resulted surface morphological microstructures are determined by molecular and ionic interactions of the bile salt moiety with different polyether co-soft segments in these biocidal polyurethane ionomers.…”

Section: Introductionmentioning

confidence: 99%

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Molecular dynamics, conductivity and morphology of sodium deoxycholate-based poly(ester ether)urethane ionomer biomaterials

et al. 2016

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Broad-band dielectric spectroscopy technique was used to investigate the molecular dynamics of new sodium deoxycholate-based poly(ester ether)urethane ionomers of particular interest in biomedical devices. These polyurethane ionomers have identical hard segment containing bile salt moiety but with different soft segment chemistries. Poly(ethylene oxide)-rich soft segment promotes stronger ionic interactions and solvation capacity of ions and higher ionic conductivity in these polyurethane ionomers. The universal power law was employed to study the evolution of alternating conductivity (AC) with frequency and temperature. The calculated values of fractional exponent ranged between 0 and 1 which indicate AC conduction through hopping mechanism. Direct current conductivity evidences Arrhenius behaviour in the function of temperature and the estimated values of activation energy for poly(ethylene oxide)-rich soft segment polyurethane ionomers are found higher. The increase in the conductivity with temperature can be interpreted as a hopping mechanism assisted by chain relaxation. AFM and SAXS investigations evidence lamellar arrangement at the sub-micron scale and the nanophase-separated morphology for these polyurethane ionomers. The tensile tests evidenced that the polyurethane with highest molecular weight exhibits the highest values of mechanical properties and ductile behaviour.

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Section: Deta Analysismentioning

confidence: 56%

Section: Deta Analysismentioning

confidence: 99%

Section: Saxs Analysismentioning

confidence: 99%

Section: Experimental Part Materialsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Molecular dynamics, conductivity and morphology of sodium deoxycholate-based poly(ester ether)urethane ionomer biomaterials

et al. 2016

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Sealing system activated by magnetic induction polymerization

Marques

Souza²,

Souza

2017

J of Applied Polymer Sci

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This work describes the one‐step production of glycerin based polyurethane/magnetite nanocomposites. The polymerization was performed in a nonaqueous dispersion containing the magnetic nanoparticles and the polar monomers under alternating magnetic field. Fourier transform infrared spectroscopy and crosslink degree tests were useful to conclude that the use of magnetic induction (∼3 min at 9300 W) produced results similar to the ones obtained by the conventional polymerization (∼3 h at 80 °C) in a fraction of the required time. A lost circulation fluid control test also was performed under magnetic induction heating and the system containing 5 wt % of the nanoparticles showed the highest reduction of the fluid flow rate. Scanning electron microscopy and probability density function tests of the best material allowed inferring that composite prepared by magnetic induction presents a non‐Gaussian distribution of the diameter, which is directly related to the observed sealing effect. These results showed that proposed polymer/polymerization system can be very useful to the sealing applications. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 45549.

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Structures, properties and applications of the polyurethane ionomers

Król

2019

J Mater Sci

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On the basis of the reports from 2010 to 2018, the chemical structure, production methods and applications of polyurethane ionomers were reviewed. The paper presents ionogenic reagents and counterions responsible for the incorporation of anionic and cationic groups into polyurethane chains and the resulting physicochemical properties of these polymers. The most important applications of synthesized ionomers as a waterborne polyurethane, elastomer materials, biomaterials and materials for special applications (electronics, nanocomposites) were presented. Abbreviations PUPolyurethane PUI Polyurethane ionomer PUD Polyurethane dispersion WPU Waterborne polyurethane HMDI 4,4 0 -Methylene bis(cyclohexyl isocyanate) MDI 4,4 0 -Methylenebis(phenyl isocyanate) HDI 1,6-Hexamethylene diisocyanate IPDI Isophorone diisocyanate PTMO Polytetramethylene glycol PCD Polycarbonate diol POG Polyethylene glycol PPG Polypropylene glycol PCL Poly(e-caprolactone) diol PLA Polylactide diol PDMS Poly(dimethylsiloxane) DMPA 2,2-Bis(hydroxymethyl)propionic acid DMBA 2,2-Bis(hydroxymethyl)butyric acid

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Structure–property relationship of sodium deoxycholate based poly(ester ether)urethane ionomers for biomedical applications

Cited by 12 publications

References 44 publications

Molecular dynamics, conductivity and morphology of sodium deoxycholate-based poly(ester ether)urethane ionomer biomaterials

Molecular dynamics, conductivity and morphology of sodium deoxycholate-based poly(ester ether)urethane ionomer biomaterials

Sealing system activated by magnetic induction polymerization

Structures, properties and applications of the polyurethane ionomers

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