The effect of ultra-thin graphite on the morphology and physical properties of thermoplastic polyurethane elastomer composites

Menes, Olivia; Cano, Manuela; Benedito, Adolfo; Giménez, Enrique; Castell, Pere; Maser, Wolfgang K.; Benito, Ana M.

doi:10.1016/j.compscitech.2012.06.016

Cited by 56 publications

(40 citation statements)

References 32 publications

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“…This reduction, during dynamic mechanical deformation, is because of the reduced elastomeric chain mobility in the presence of MLG. [52,53] CIIR/E-MLG and CIIR/C-MLG showed the highest tan δ peak reductions (about 13%), confirming the better dispersion of the MLG and the stronger interaction between the nanofiller and elastomeric chains. This is consistent with the conclusion of J. R. Potts et al [54] and L. Wang et al [55] Furthermore, the reduction in tan δ describes the reduction in energy dissipation during dynamic Durability of mechanical properties against weathering exposure Figure 9 shows the optical microscope images of the unfilled CIIR and the MLG/nanocomposites after 1500 hr weathering exposure.…”

Section: Electrical Conductivity Of Ciir and Ciir/mlg Nanocompositessupporting

confidence: 75%

Multilayer graphene/chlorine-isobutene-isoprene rubber nanocomposites: the effect of dispersion

Frasca

Schulze

Wachtendorf

et al. 2016

Polym. Adv. Technol.

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Multilayer graphene (MLG) is composed of approximately 10 sheets of graphene. It is a promising nanofiller just starting to become commercially available. The dispersion of the nanofiller is essential to exploit the properties of the nanocomposites and is dependent on the preparation method. In this study, direct incorporation of 3 parts per hundred of rubber (phr) MLG into chlorine-isobutene-isoprene rubber (CIIR) on a two-roll mill did not result in substantial enhancement of the material properties. In contrast, by pre-mixing the MLG (3 phr) with CIIR using an ultrasonically assisted solution mixing procedure followed by two-roll milling, the properties (rheological, curing, and mechanical) were improved substantially compared with the MLG/CIIR nanocomposites mixed only on the mill. The Young's moduli of the nanocomposites mixed in solution increased by 38%. The CIIR/MLG nanocomposites produced via solution showed superior durability against weathering exposure.

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Section: Electrical Conductivity Of Ciir and Ciir/mlg Nanocompositessupporting

confidence: 75%

Multilayer graphene/chlorine-isobutene-isoprene rubber nanocomposites: the effect of dispersion

Frasca

Schulze

Wachtendorf

et al. 2016

Polym. Adv. Technol.

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“…This morphology can be attributed to the higher site-specific interaction between TPU matrix and Mt-PPy.DBSA. The infrared spectra of neat TPU, TPU/PPy blends and TPU/Mt-PPy nanocomposites filled with 20 wt% is attributed to -NH group of urethane while the bands at 1219 and 1105 cm -1 are assigned to the ether group [43][44][45][46][47][48][49][50]. The spectra of the TPU/PPy and TPU/Mt-PPy exhibited overlapped absorption bands of PPy and TPU.…”

Section: Results and Discussion 31 Characterization Of Conductive Fmentioning

confidence: 99%

Novel electrically conductive polyurethane/montmorillonite-polypyrrole nanocomposites

Ramôa¹,

Barra²,

Merlini³

et al. 2015

Express Polym. Lett.

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Abstract. This work describes the production of electrically conductive nanocomposites based on thermoplastic polyurethane (TPU) filled with montmorillonite-dodecylbenzenesulfonic acid-doped polypyrrole (Mt-PPy.DBSA) prepared by melt blending in an internal mixer. The electrical conductivity, morphology as well as the rheological properties of TPU/MtPPy.DBSA nanocomposites were evaluated and compared with those of TPU nanocomposites containing different conductive fillers, such as polypyrrole doped with hydrochloride acid (PPy.Cl) or dodecylbenzenesulfonic acid (PPy.DBSA) or montmorillonite-hydrochloride acid-doped polypyrrole (Mt-PPy.Cl), prepared with the same procedure. The TPU/MtPPy.DBSA nanocomposites display a very sharp insulator-conductor transition and the electrical percolation threshold was about 10 wt% of Mt-PPy.DBSA, which was significantly lower than those found for TPU/Mt-PPy.Cl, TPU/PPy.Cl and TPU/PPy.DBSA. Morphological analysis highlights that Mt-PPy.DBSA filler was better distributed and dispersed in the TPU matrix, forming a denser conductive network when compared to Mt-PPy.Cl, PPy.Cl and PPy.DBSA fillers. This morphology can be attributed to the higher site-specific interaction between TPU matrix and Mt-PPy.DBSA. The present study demonstrated the potential use of Mt-PPy.DBSA as new promising conductive nanofiller to produce highly conductive polymer nanocomposites with functional properties.

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“…24 Originally produced in very small quantities, 25 graphene can now be produced in large quantities by exfoliation 26 of graphite in solvents, 27 aqueous surfactant solutions 28 or polymer solutions. 29,30 Already, graphene has displayed significant success in reinforcing 31-34 both thermoplastics [35][36][37] and elastomers, 38,39 in some cases at very low loading level. 36,40,41 With this in mind, graphene appears to be a promising additive for thermoplastic adhesives.…”

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confidence: 99%

Improved Adhesive Strength and Toughness of Polyvinyl Acetate Glue on Addition of Small Quantities of Graphene

Khan

May

Porwal

et al. 2013

ACS Appl. Mater. Interfaces

122

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We have prepared composites of polyvinyl acetate (PVAc) reinforced with solution exfoliated graphene. We observe a 50% increase in stiffness and a 100% increase in tensile strength on addition of 0.1vol% graphene compared to the pristine polymer. As PVAc is commonly used commercially as a glue, we have tested such composites as adhesives. The adhesive strength and toughness of the composites were up to 4 and 7 times higher, respectively, than the pristine polymer.

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The effect of ultra-thin graphite on the morphology and physical properties of thermoplastic polyurethane elastomer composites

Cited by 56 publications

References 32 publications

Multilayer graphene/chlorine-isobutene-isoprene rubber nanocomposites: the effect of dispersion

Multilayer graphene/chlorine-isobutene-isoprene rubber nanocomposites: the effect of dispersion

Novel electrically conductive polyurethane/montmorillonite-polypyrrole nanocomposites

Improved Adhesive Strength and Toughness of Polyvinyl Acetate Glue on Addition of Small Quantities of Graphene

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