Studies on thermoplastic polyurethanes based on new diphenylethane-derivative diols. I. Synthesis and characterization of nonsegmented polyurethanes from HDI and MDI

Rogulska, Magdalena; Podkościelny, Wawrzyniec; Kultys, Anna; Pikus, S.; Poździk, Elżbieta

doi:10.1016/j.eurpolymj.2006.02.014

Cited by 66 publications

(41 citation statements)

References 30 publications

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“…Among these, polyurethanes are one of the most important classes of polymers due to their segmented (hard and soft) polymeric character obtained through the use of a chain extender which mainly determines their mechanical and physical properties [3,4]. In the last decade nonsegmented polyurethanes [5] which is usually the case when natural hydroxyl sources are used, have been synthesis for different purposes [6][7][8][9]. Polyurethanes are also recognized with their biocompatibility and biodegradation character [10] and hence have an important potential in wound dressing applications [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Fatty acid-based polyurethane films for wound dressing applications

Gultekin

Atalay-Oral

Erkal

et al. 2008

J Mater Sci: Mater Med

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Fatty acid-based polyurethane films were prepared for use as potential wound dressing material. The polymerization reaction was carried out with or without catalyst. Polymer films were prepared by casting-evaporation technique with or without crosslink-catalyst. The film prepared from uncatalyzed reaction product with crosslink-catalyst gave slightly higher crosslink density. The mechanical tests showed that, the increase in the tensile strength and decrease in the elongation at break is due to the increase in the degree of crosslinking. All films were flexible, and resisted to acid solution. The films prepared without crosslink-catalyst were more hydrophilic, absorbed more water. The highest permeability values were generally obtained for the films prepared without crosslink catalyst. Both the direct contact method and the MMT test were applied for determination of cytotoxicity of polymer films and the polyurethane film prepared from uncatalyzed reaction product without crosslink-catalyst showed better biocompatibility property, closest to the commercial product, Opsite Ò .

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Section: Introductionmentioning

confidence: 99%

Fatty acid-based polyurethane films for wound dressing applications

Gultekin

Atalay-Oral

Erkal

et al. 2008

J Mater Sci: Mater Med

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“…In contrast, the aliphatic diisocyanate-based TPUs show no change of colour in the same condition [3]. This paper is a continuation of research on the new TPUs derived from aliphatic-aromatic sulphur-containing chain extenders as well as derivatives of diphenylmethane [5][6][7][8][9][10][11][12][13], diphenylethane [14][15][16], benzophenone [17][18][19], diphenyl ether [20] and diphenyl sulphide [21,22]. Based on the test results, it can be concluded that the introduction of sulphur atoms into the structure of a polymer has increased their adhesive strength [21] and refractive index [11,12].…”

Section: Introductionmentioning

confidence: 74%

New thermoplastic polyurethane elastomers based on aliphatic diisocyanate

Puszka

Kultys

2016

J Therm Anal Calorim

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New segmented polyurethanes (SPURs) were synthesized by one-step melt polyaddition from a poly (oxytetramethylene)diol of M n = 1000 g mol -1 (PTMO) or a poly(hexamethylene carbonate)diol of M n = 860 g mol -1 (PHCD) as soft segments, 5-isocyanato-1-(isocyanatomethyl)-1,3,3-trimethylcyclohexane (IPDI), and 2,2 0 -methylenebisas an unconventional chain extender. Furthermore, some of SPURs were modified by the addition of a carboxylic group by means of 3-hydroxy-2-(hydroxymethyl)-2-methylpropanoic acid. The effects of the kind and amount of the polymer diol and chain extender used on the structure and properties of the polymers were studied. The polymers were examined by attenuated total reflection Fourier transform infrared spectroscopy, gel permeation chromatography, thermogravimetric analysis (TG), TG-FTIR, differential scanning calorimetry (DSC), Shore A/D hardness and tensile testing. The obtained SPURs were amorphous, colourless, high molar mass materials which showed elastomeric or plastic properties. Their T g s were in the range of -51 to 29°C. It was observed that the polymers with a PHCD demonstrated a better segmental miscibility (higher T g s), as well as greater hardness and tensile strengths, but smaller elongations at break than PTMO-based ones. All of the polymers exhibited a relatively good thermal stability.

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“…Molecular characterization and morphological studies of polyurethane elastomers have been reported by many researchers. The effect of the diisocyanate structure [4] and chain extender (CE) length using a, v-alkane diols on the crystallinity, surface morphology [5] and thermo-mechanical properties [6] of PUEs have also been investigated and well documented.…”

Section: Introductionmentioning

confidence: 99%