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Mechanical and Swelling Properties of Hydroxyl-Terminated Polybutadiene-Based Polyurethane Elastomers

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Abstract

The mechanical and swelling properties of an elastomeric polyurethanes have been studied. The elastomers were composed of hydroxyl-terminated polybutadiene, the chain extended with either glyceryl monoricinoleate, neopentyl glycol, trimethylolpropane and cured with toluene diisocyanate and 4,4′-methylene diphenyl diisocyanate. The mineral fillers under study were nanoclay, TiO2, ZrO2 and ZnO. Gel fraction, crosslinking degree and average molecular weight between crosslinks were calculated from the swelling data. The hydrogen bonding index, which is a measure of hydrogen bonding, was calculated from infrared spectrophotometric data. The most remarkable result was that crosslink density diminished for a nanoclay polyurethane nanocomposite compared to an unfilled sample. Samples with nanoclay exhibited an unusual inverse correlation between crosslink density and tensile strength. Our findings showed that nanoclay in particular is an effective inorganic filler that can modulate the microstructural and mechanical behavior of polyurethane elastomers for tuned applications.

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Authors and Affiliations

  1. Applied Chemistry Department, Argentine Institute for Scientific and Technical Research for the Defense (CITEDEF), Ave. J.B. de La Salle 4397, B1603ALO, Buenos Aires, Argentina

    Javier Quagliano, Javier Bocchio & Pablo Ross

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  1. Javier Quagliano
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  2. Javier Bocchio
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  3. Pablo Ross
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Correspondence to Javier Quagliano.

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Quagliano, J., Bocchio, J. & Ross, P. Mechanical and Swelling Properties of Hydroxyl-Terminated Polybutadiene-Based Polyurethane Elastomers. JOM 71, 2097–2102 (2019). https://doi.org/10.1007/s11837-019-03417-8

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