Surface characteristics of UV-irradiated polyurethane elastomers extended with α, ω-alkane diols

Zia, Khalid Mahmood; Bhatti, Ijaz Ahmad; Barikani, Mehdi; Zuber, Mohammad; Islamuddin,

doi:10.1016/j.apsusc.2008.04.066

Cited by 31 publications

(14 citation statements)

References 23 publications

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“…It means that the number of methylene units in the aliphatic diols used as chain extender has considerable effect on the structure of irradiated PU samples [3].…”

Section: Resultsmentioning

confidence: 99%

“…The physico-mechanical properties, the chemical resistance and the good processability make PU available in many technical applications as protective coatings, adhesives, biomedical materials [2,3]. Although the PU materials have good mechanical properties, however their use as coating materials is limited by the sensitivity to the light.…”

Section: Introductionmentioning

confidence: 99%

“…The mechanism of photo-degradation of PU is well known [3,4]. Atomic force microscopy (AFM) analysis on photodegraded surfaces of polyurethane coating has identified blisters under continuous exposure while under dark-light cycles the blisters retained a constant size and shape [5,6].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The influence of polychromic light on the surface of MDI based polyurethane elastomer

Roşu¹,

Ciobanu²,

Roşu³

et al. 2009

Applied Surface Science

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“…It means that the number of methylene units in the aliphatic diols used as chain extender has considerable effect on the structure of irradiated PU samples [3].…”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The influence of polychromic light on the surface of MDI based polyurethane elastomer

Roşu¹,

Ciobanu²,

Roşu³

et al. 2009

Applied Surface Science

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“…It was found also that, the tensile straight; MPa were affected sharply according to the CE percent in the different PU formulations, in which, the increasing in the CE percent, leads to increase the tensile strength; MPa of coated fabrics. This could be attributed to the increasing of the hard segment content for CE/polyol ratio and the increasing of H-bonding density in PU bonds (Zia et al, 2009). From Fig.…”

Section: Mechanical Propertiesmentioning

confidence: 99%

Surface Characteristics of Cotton/ Polyester Fabric Coated with Poly-urethane Elastomers Cured Thermally or by Using Gamma Irradiation

2014

Egypt. J. Rad.Sci.

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IFFERENT POLYURETHANE (PU) elastomerics formulations were prepared by using 4, 4'-diphenyl methane diisocyanate, polyol (castor oil; CO), chain extender (1,4-butanediol); CE and catalyst. The prepared PU formulations were applied as coating films up on the cotton/ polyester blend fabric surface. The specimens were cured to complete the reaction of the PU spell, either thermally (140°C) or by using γ-rays at different doses (30-150 kGy). The PU layer formed up on the fabric surface was characterized by using Fouriertransform infrared (FTIR). The effects of CE percent and the used curing system on the coated fabrics properties, such as mechanical properties, thermal stability, water absorbance, crease recovery and surface morphology were investigated. The results showed that the increasing of CE percent and the irradiation dose lead to improving the tensile strength; MPa and the thermal stability, while, the elongation at break (%), crease recovery and water absorbance were decreased.

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“…However, the aromatic diisocyanate-based TPUs possess serious defects, such as change of colour or decrease in thermal and mechanical properties against ultraviolet and visible light and heat [1,3,4]. In contrast, the aliphatic diisocyanate-based TPUs show no change of colour in the same condition [3].…”

Section: Introductionmentioning

confidence: 99%

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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Surface characteristics of UV-irradiated polyurethane elastomers extended with α, ω-alkane diols

Cited by 31 publications

References 23 publications

The influence of polychromic light on the surface of MDI based polyurethane elastomer

The influence of polychromic light on the surface of MDI based polyurethane elastomer

Surface Characteristics of Cotton/ Polyester Fabric Coated with Poly-urethane Elastomers Cured Thermally or by Using Gamma Irradiation

New thermoplastic polyurethane elastomers based on aliphatic diisocyanate

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