Properties of polyurethane adhesives containing natural calcium carbonate + fumed silica mixtures

Sepulcre-Guilabert, José; Ferrándiz-Gómez, Teresa P.; Martı́n-Martı́nez, José Miguel

doi:10.1163/156856101743409

Cited by 21 publications

(13 citation statements)

References 13 publications

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“…By increasing the carbon black loading, the decrease in storage modulus at low frequency is not produced and the storage modulus (G′) increases by increasing the carbon black loading in the solution, which is a further evidence of the existence of a network between the polyurethane, the carbon black and the solvent. [28] …”

Section: Resultsmentioning

confidence: 99%

Effect of the carbon black content on the thermal, rheological and mechanical properties of thermoplastic polyurethanes

Álvarez-García

Martı́n-Martı́nez

2015

Journal of Adhesion Science and Technology

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Different mixtures of thermoplastic polyurethane (PU) with different amounts of nanometric carbon black (CB) were prepared by mechanical stirring in organic solvent, and their thermal, rheological, viscoelastic and mechanical properties were investigated. The rheology of the PU-CB mixtures in methyl ethyl ketone was optimized, allowing good dispersion of the CB in the polyurethane matrix once the solvent was removed; an increase in the number and size of carbon black aggregates in the polyurethane matrix was obtained by increasing the carbon black loading. Addition of carbon black improved the rheological and viscoelastic properties of the polyurethane, and the larger was the carbon black content, the higher was the storage modulus and the lower was the tanδ value. Moreover, the addition of higher amounts of CB changed the viscoelastic behaviour of the polyurethane, which became mainly elastic over all temperature range. On the other hand, the addition of CB loadings up to 12 wt% increased the thermal stability of the polyurethanes and increased the elongation-at-break without noticeable reduction in the tensile strength.

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Section: Resultsmentioning

confidence: 99%

Effect of the carbon black content on the thermal, rheological and mechanical properties of thermoplastic polyurethanes

Álvarez-García

Martı́n-Martı́nez

2015

Journal of Adhesion Science and Technology

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“…Addition of fillers such as calcium carbonate (CaCO 3 ) is commonly used to tailor mechanical properties such as strength and modulus with a reduction of the material cost. Because of low filler–matrix interactions, many attempts were carried out to improve the compatibility at the interface using, for instance, silane grafted onto the filler or fatty acid treatment …”

Section: Introductionmentioning

confidence: 99%

“…modulus with a reduction of the material cost. Because of low filler-matrix interactions, 8 many attempts were carried out to improve the compatibility at the interface using, for instance, silane grafted onto the filler or fatty acid treatment. 9,10 Studies on talc-filled polymers have also been widely investigated.…”

Section: Introductionmentioning

confidence: 99%

Renewable thermoplastic multiphase systems from dimer fatty acids, with mineral microfillers

Reulier

Boumbimba²,

Rasselet

et al. 2015

J of Applied Polymer Sci

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Renewable thermoplastic blends based on polyurethane (TPU) and polyamide (DAPA) obtained from dimers of fatty acids were reinforced with mineral microfillers, surface coated calcium carbonate (CaCO 3 ) or high aspect ratio talc (HAR), to prepare different micro-biocomposites systems. The influence of the nature of the filler, the aspect ratio and the filler content (5, 10, and 15 wt %), for different TPU/DAPA ratios (20/80, 50/50, and 80/20 wt %/wt %), were specifically investigated. Differential scanning calorimetry (DSC) and thermogravimetric analyses were conducted to investigate the thermal properties. DSC analyses showed that the addition of CaCO 3 had no influence on the glass transition and the melting temperature of the corresponding composites. Moreover, the morphology and the mechanical properties in the solid state of the different multiphase systems were investigated. SEM observations after tensile tests showed that the best matrix/filler interactions were obtained in the case of the 20/80-based systems. Uniaxial tensile tests have shown that the addition of HAR or CaCO 3 fillers led to a clear increase of the Young modulus. Micromechanical models based on a two-phase composite approach, including Mori-Tanaka and Davies models were used to describe the dependence of the elastic modulus on the volume fraction of HAR or CaCO 3 fillers.

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“…[4] One of the promising inorganic fillers in this field is montmorillonite (Mt). The structural unit of Mt is two tetrahedral sheets.…”

Section: Introductionmentioning

confidence: 99%

Study on the structure and properties of RTV/FR-DOMt nanocomposites

Wei

Wang

Zhao

2016

Journal of Experimental Nanoscience

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The aim of our research was to study the effect of flame-retardant dendrimer modified organic montmorillonite (FR-DOMt) with different ratios on the structure and properties of room-temperaturevulcanised silicone rubber (RTV). The physical and mechanical properties of RTV nanocomposites were improved with the addition of FR-DOMt additives. The RTV nanocomposites exhibited better thermal stability. T onset of RTV/FR-DOMt-3 was 310 C, 100 C higher than that of pure RTV. RTV/FR-DOMt-3 nanocomposite possessed the highest elongation at break, 500%. This was 46% higher than that of pure RTV. In addition, these RTV nanocomposites showed an increased FR behavior. By adding 3À15 phr of FR-DOMt into pure RTV matrix, a linear decrease of burning rate together with an increase of LOI values were obtained. SEM and TEM observations of RTV/FR-DOMt-3 demonstrated that the exfoliated silicate layers dispersed uniformly in this nanocomposite.

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Properties of polyurethane adhesives containing natural calcium carbonate + fumed silica mixtures

Cited by 21 publications

References 13 publications

Effect of the carbon black content on the thermal, rheological and mechanical properties of thermoplastic polyurethanes

Effect of the carbon black content on the thermal, rheological and mechanical properties of thermoplastic polyurethanes

Renewable thermoplastic multiphase systems from dimer fatty acids, with mineral microfillers

Study on the structure and properties of RTV/FR-DOMt nanocomposites

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