The synthesis and characterization of new thermoplastic poly(carbonate-urethane) elastomers derived from HDI and aliphatic–aromatic chain extenders

Kultys, Anna; Rogulska, Magdalena; Pikus, S.; Skrzypiec, Krzysztof

doi:10.1016/j.eurpolymj.2009.06.003

Cited by 82 publications

(80 citation statements)

References 44 publications

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“…The low crystallinity of these novel polycarbonate diols allows for their use in systems that are liquid at room temperature and prevents cold hardening of the resulting polyurethane. Kultys et al [80] summarized hardness properties of PCPUs as they relate to structure. Soft PCPUs with low moduli of elasticity are obtained in commercially aliphatic H12MDI/butane diol hard segment polymers.…”

Section: Hardness and Non-blocking Propertiesmentioning

confidence: 99%

Synthesis and characterization of an ultra-soft poly(carbonate urethane)

Kull

Bass

Craft

et al. 2015

European Polymer Journal

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Section: Hardness and Non-blocking Propertiesmentioning

confidence: 99%

Synthesis and characterization of an ultra-soft poly(carbonate urethane)

Kull

Bass

Craft

et al. 2015

European Polymer Journal

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“…This study is a part of an ongoing investigation concerning new TPUs obtained from aliphatic-aromatic sulfur-containing chain extenders, derivatives of, among others, diphenylmethane, diphenylethane, benzophenone, diphenyl ether and diphenyl sulfide [6][7][8][9][10][11][12][13]. On the basis of the studies conducted for selected polymers, it was stated that the introduction of sulfur atoms to the polymer chain improved their adhesive strength [12,[14][15][16] and refractive index [15,16].…”

Section: Introductionmentioning

confidence: 99%

Aliphatic polycarbonate-based thermoplastic polyurethane elastomers containing diphenyl sulfide units

Rogulska

Kultys

2016

J Therm Anal Calorim

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New thermoplastic polyurethane elastomers (TPUs) were obtained by a one-step melt polyaddition from 30, 45 and 60 mol% aliphatic polycarbonate diol of M n = 2000 g mol -1 (Desmophen Ò C2200, Bayer), 1,1 0 -methanediylbis(4-isocyanatocyclohexane) (HMDI) or 1,6-diisocyanatohexane (HDI) and 2,2 0 -[sulfanediylbis(benzene-1,4-diyloxy)]diethanol (acting as a chain extender). The TPUs were examined by FTIR, UV-Vis, atomic force microscopy, X-ray diffraction analysis, differential scanning calorimetry, thermogravimetry (TG) and TG-FTIR. Moreover, their Shore A/D hardness, tensile, adhesive and optical properties were determined. The obtained TPUs were transparent or opaque high molar mass materials, showing amorphous or partially crystalline structures. The HDI-based TPUs exhibited lower glass-transition temperatures than those based on HMDI (from -35 to -31°C vs. from -20 to 1°C) as well as a higher degree of microphase separation. The TPUs were stable up to 262-272°C, taking into account the temperature of 1 % mass loss, with somewhat higher values shown by those from HDI. They decomposed in two stages. The main volatile products of the hard-segment decomposition were carbon dioxide, water and carbonyl sulfide, while aliphatic ethers, aldehydes and unsaturated alcohols, as well as carbon dioxide, originated from the soft-segment decomposition. The synthesized TPUs, with hardness in the range of 80-90°Sh A, possessed a good tensile strength (33.0-38.7 MPa), similar to that of the commercial biodurable medical grade TPU ChronoFlex Ò AL 80A (37.9 MPa), prepared from aliphatic polycarbonate diol, HMDI and butane-1,4-diol.

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“…This paper is a continuation of our studies on the synthesis and characterization of new thermoplastic segmented polyurethanes, including TPUs, based on commercial diisocyanates and polymer diols as well as nonconventional aliphatic-aromatic chain extenders. These chain extenders are diols with sulfide linkages and dithiols, derivatives, among others, of diphenylmethane, diphenylethane, benzophenone, diphenyl ether and diphenyl sulfide [8][9][10][11][12][13][14][15][16][17][18]. Making use of ''bulky'' chain extenders, additionally introducing sulfur atoms to polymer chain can improve adhesive properties to metals [9,10,13,17,18] and refractive index [10,13] and enhance antimicrobial activity [10] of such polyurethanes in relation to conventional ones.…”

Section: Introductionmentioning

confidence: 99%

The effect of chain extender structure on the properties of new thermoplastic poly(carbonate–urethane)s derived from MDI

Rogulska

Kultys

Pikus

2016

J Therm Anal Calorim

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Two series of high-molar-mass thermoplastic poly(carbonate-urethane)s (PCURs) were synthesized from nonconventional sulfur-containing chain extenders, i.e., 2,2 0 -[sulfanediylbis(benzene-1,4-diyloxy)]diethanol (diol SE) and 2,2 0 -[methanediylbis(benzene-1,4-diylmethanediylsulfanediyl)]diethanol (diol ME), 1,1 0 -methanediylbis(4-isocyanatobenzene) and 30, 45 and 60 mol% aliphatic polycarbonate diol of M n = 2000 g mol -1 (Desmophen Ò C2200, Bayer) via a one-step melt polyaddition. The PCURs were investigated by FTIR, UV-Vis, atomic force microscopy, X-ray diffraction analysis, differential scanning calorimetry, thermogravimetry (TG) and TG-FTIR. Moreover, their Shore A/D hardness, tensile, adhesive and optical properties were determined. The obtained PCURs were transparent or opaque elastomers, possessing amorphous or partially crystalline structures. The polymers based on diol ME showed lower glass transition temperatures (-9 to (-8) vs. -7 to 20°C) and better microphase separation. All the PCURs exhibited a relatively good thermal stability. Their temperature of 1 % mass loss was within the range of 284-292°C with somewhat higher values shown by those obtained from diol ME. The PCURs decomposed in two (from diol ME) or three (from diol SE) stages, and for both types of polymers, the main decomposition occurred at the first stage. All the PCURs based on diol SE exhibited higher tensile strength (33.5-41.9 vs. 27.0-31.5 MPa), but smaller elongation at break (300-400 vs. 450-550 %) than polymers derived from diol ME. Somewhat better adhesive properties and a slightly higher refractive index were found for polymer based on diol ME with two sulfur atoms.

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The synthesis and characterization of new thermoplastic poly(carbonate-urethane) elastomers derived from HDI and aliphatic–aromatic chain extenders

Cited by 82 publications

References 44 publications

Synthesis and characterization of an ultra-soft poly(carbonate urethane)

Synthesis and characterization of an ultra-soft poly(carbonate urethane)

Aliphatic polycarbonate-based thermoplastic polyurethane elastomers containing diphenyl sulfide units

The effect of chain extender structure on the properties of new thermoplastic poly(carbonate–urethane)s derived from MDI

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