Effect of ionic group content on thermal and structural properties of polycaprolactone-based shape memory polyurethane ionomers

Momtaz, Milad; Barikani, Mehdi; Razavi‐Nouri, Mohammad

doi:10.1007/s13726-015-0341-4

Cited by 18 publications

(7 citation statements)

References 39 publications

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“…The effect of ionic group content on thermal, structural and shape memory properties of segmented polyurethane ionomers based on PCL, MDI, BD and DMPA neutralized with TEA was analyzed in detail in Ref. [15]. It was found that the ionomers with higher amount of ionic groups have relatively stronger tendency to crystallize.…”

Section: Application Of Polyurethane Ionomers In Elastomer Materialsmentioning

confidence: 99%

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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Section: Application Of Polyurethane Ionomers In Elastomer Materialsmentioning

confidence: 99%

Structures, properties and applications of the polyurethane ionomers

Król

2019

J Mater Sci

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“…Specifically, despite a variety of studies on polyurethane ionomers, there are relatively few publications related to the synthesis of ionomer PUs containing more than one ionic functionality in the hard phase [ 20 , 21 ]. Indeed, usually, the ionic monomer, which most of the time is also the chain extender, is added in molar ratio with respect to the diisocyanate-polyol-diisocyanate prepolymer to obtain a final 2:1:1 diisocyanate:ionic monomer:polyol composition [ 22 , 23 , 24 , 25 ].…”

Section: Introductionmentioning

confidence: 99%

Silver- and Zinc-Decorated Polyurethane Ionomers with Tunable Hard/Soft Phase Segregation

Rapone

Taresco

Lisio

et al. 2021

IJMS

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Segmented polyurethane ionomers find prominent applications in the biomedical field since they can combine the good mechanical and biostability properties of polyurethanes (PUs) with the strong hydrophilicity features of ionomers. In this work, PU ionomers were prepared from a carboxylated diol, poly(tetrahydrofuran) (soft phase) and a small library of diisocyanates (hard phase), either aliphatic or aromatic. The synthesized PUs were characterized to investigate the effect of ionic groups and the nature of diisocyanate upon the structure–property relationship. Results showed how the polymer hard/soft phase segregation was affected by both the concentration of ionic groups and the type of diisocyanate. Specifically, PUs obtained with aliphatic diisocyanates possessed a hard/soft phase segregation stronger than PUs with aromatic diisocyanates, as well as greater bulk and surface hydrophilicity. In contrast, a higher content of ionic groups per polymer repeat unit promoted phase mixing. The neutralization of polymer ionic groups with silver or zinc further increased the hard/soft phase segregation and provided polymers with antimicrobial properties. In particular, the Zinc/PU hybrid systems possessed activity only against the Gram-positive Staphylococcus epidermidis while Silver/PU systems were active also against the Gram-negative Pseudomonas aeruginosa. The herein-obtained polyurethanes could find promising applications as antimicrobial coatings for different kinds of surfaces including medical devices, fabric for wound dressings and other textiles.

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“…Specifically, despite a variety of studies on polyurethane ionomers, there are relatively few publications related to the synthesis of ionomer PUs containing more than one ionic functionality in the hard phase [20,21]. Indeed, usually, the ionic monomer, which most of the time is also the chain extender, is added in molar ratio with respect to the diisocyanatepolyol-diisocyanate prepolymer to obtain a final 2:1:1 diisocyanate:ionic monomer:polyol composition [22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%