Ethylene vinyl acetate/nanoclay‐based pigment composites: Morphology, rheology, and mechanical, thermal, and colorimetric properties

Abstract

In this study, a new type of nanopigment, obtained from a nanoclay (NC) and a dye, was synthesized in the laboratory, and these nanopigments were used to color an ethylene vinyl acetate (EVA) copolymer. Several of these nanoclay-based pigments (NCPs) were obtained through variations in the cation exchange capacity (CEC) percentage of the NC exchanged with the dye and also including an ammonium salt. Composites of EVA and different amounts of the as-synthesized nanopigments were prepared in a melt-intercalation process. Then, the morphological, mechanical, thermal, rheological, and colorimetric properties of the samples were assessed. The EVA/NCP composites developed much better color properties than the samples containing only the dye, especially when both the dye and the ammonium salt were exchanged with NC. Their other properties were similar to those of more conventional EVA/NC composites.

Characterisation of montmorillonites simultaneously modified with an organic dye and an ammonium salt at different dye/salt ratios. Properties of these modified montmorillonites EVA nanocomposites

“…The corresponding interlayer opening for the same amount of both surfactants is 0.66 and 0.80 (for OMt50MB and OMt50C16, respectively). So, as expected, the interlayer distance for a certain amount of dye in the OMt-MB synthesised in the previous works (Marchante et al, 2013a;Marchante et al, 2013b) is considerably increased by the addition of the EHDDMA.…”

Mechanical and thermal properties of low density polyethylene composites filled with dye‐loaded shell powder

“…Nevertheless, clay minerals are hydrophilic in nature, and even after modification, are difficult to disperse into a polymer matrix, which limits the filler content and thus the color gamut. In those previous reports, the Young's modulus of polymer/NCP composites were improved, however, some mechanical properties like tensile strength and impact strength were not noticeably enhanced or even decreased as NCPs content increased. With respect to the thermal behaviors, samples of the polymer/NCP composites did not show significant modification in thermal stability, regardless of fillers loading.…”

Colorating and mechanical performance of low-density polyethylene (LDPE)/dye-loaded shell powder (DPSP) composites

“…Recently, a nanoclay-based pigment (NCP) obtained from clay modified with dyes has gained much attention [17][18][19][20][21][22]. Combining the advantages of dye coloration and nanoclay filling [23], this additive could improve mechanical properties while giving better color performance than using conventional colorants.…”