An investigation on the effect of pigments on the texture ability and mechanical properties of polypropylene BCF yarns

Bagheri, Ghasem; Tavanai, Hossein; Ghiaci, Mehran; Morshed, Mohammad; Shamsabadi, Amir Shahin

doi:10.1080/00405000.2019.1694824

Cited by 6 publications

(3 citation statements)

References 28 publications

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“…The CA concentrations in this work are in this range (see Table 2). Selected dye concentrations (between 0.3 and 0.9 wt%) produce a near 1:1 molar ratio with GLY and they also are in the range frequently used for coloring PP with organic pigments 15,17 …”

Section: Methodsmentioning

confidence: 99%

“…Its non‐polar aliphatic structure and high crystallinity give place to this characteristic 14 . Numerous methods are used for coloring PP, including chemical modification by grafting of polar groups, blending with dyeable polymers and/or nanoparticles, copolymerization, plasma treatment, and mass coloration via pigmentation 14–17 . Mass coloration with organic dyes is a method that has received scarce attention because most dyes do not dissolve well in polyolefins, may give place to blooming and deposition of color on surfaces and/or may display poor thermal‐ and photo‐stability.…”

Section: Introductionmentioning

confidence: 99%

“…14 Numerous methods are used for coloring PP, including chemical modification by grafting of polar groups, blending with dyeable polymers and/or nanoparticles, copolymerization, plasma treatment, and mass coloration via pigmentation. [14][15][16][17] Mass coloration with organic dyes is a method that has received scarce attention because most dyes do not dissolve well in polyolefins, may give place to blooming and deposition of color on surfaces and/or may display poor thermal-and photo-stability. Thus, dyes are generally incorporated directly to the surface of final pieces, which includes blending or surface treatment with polar groups that serve as sorption sites for dyestuff.…”

Section: Introductionmentioning

confidence: 99%

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Coloration and branching of polypropylene by reactive processing

Schmidt

Guapacha

Quinzani

et al. 2023

J of Applied Polymer Sci

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Reactive melt processing is a known technique used to produce long-chain branched polypropylene. It involves polyfunctional substances that act as chain-linking agents (CA). In this work, polyfunctional amine dyes are used as CA in a novel method for simultaneously improving melt strength and fade resistance of polypropylene. Colored long-chain branched polymer is synthesized by reactive processing of maleic anhydride grafted polypropylene (PPg) in the molten state using glycerol, basic fuchsin and disperse blue 1. Selected CA concentrations avoid gel-like structures and impart good color intensity.FT-IR spectroscopy confirms the reaction between PPg and the CAs while rheological characterization supports the synthesis of long-chain branched structures. Covalent bonding of dye molecules to PPg is confirmed by both UV-visible spectroscopy and colorimetry. A maximum total color difference, ΔE*, of about 20 was measured after xylene purification. New materials show good color homogeneity and transparency with minimum bleeding after 48 hours exposure to water and ethanol.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Coloration and branching of polypropylene by reactive processing

Schmidt

Guapacha

Quinzani

et al. 2023

J of Applied Polymer Sci

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The Effect of Nitrogen and Oxygen Dopants on the Morphology and Microstructure of Zinc Oxide Nanoparticles Incorporated Electrospun Poly(acrylonitrile) Based Activated Carbon Nanofibers

Farhadi

Tavanai

Abdolmaleki

et al. 2020

J Inorg Organomet Polym

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The effect of masterbatch pigments on the crystallisation, morphology, and shrinkage behaviour of Isotactic Polypropylene

et al. 2022

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Variations in mould shrinkage when using organic and inorganic pigments in semicrystalline polymers is a well-known phenomenon within industry. These differences in mould shrinkage are thought to be caused by the presence of the pigments acting as nucleating agents, altering the crystallisation of semicrystalline polymers. These shrinkage variations can give rise to problems in obtaining the correct interference fit between parts and can cause issues in automated equipment such as filling lines. It has been previously reported that the onset temperature of crystallisation measured via DSC (differential scanning calorimetry) can be used to predict shrinkage when a variety of neat pigments are added to un-nucleated PP (polypropylene). However, the shrinkage and crystallisation behaviour of masterbatch pigments, which are widely used industrially is poorly understood. To better understand the influence of masterbatch pigments on crystallisation and shrinkage behaviour, injection moulded samples were prepared using variety of reds, whites, and purple commercial-masterbatch pigments with PP. The crystallisation kinetics and crystallinity were studied using DSC, LPOM (Linkam hot stage polarising optical microscopy), XRD (X-ray diffraction), and FTIR (Fourier transform infrared spectroscopy). The morphology was investigated via LPOM and SEM (scanning electron microscopy). A clear correlation was observed between the crystallisation onset temperature measured using DSC and the recorded shrinkage. A strong relationship was also observed between the percentage crystallinity measured using FTIR and shrinkage. Quinacridone and pyrrole based red and purple pigments were found to act as strong nucleating agents, with the pyrrole based red pigment also acting as β nucleator in PP. The white pigments were found to have less influence on the nucleation behaviour. For the pigments which induced the largest variation in shrinkage, a higher rate of nucleation and proportionally smaller spherulitic diameter was observed by DSC, SEM, and LPOM.

show abstract

An investigation on the effect of pigments on the texture ability and mechanical properties of polypropylene BCF yarns

Cited by 6 publications

References 28 publications

Coloration and branching of polypropylene by reactive processing

Coloration and branching of polypropylene by reactive processing

The Effect of Nitrogen and Oxygen Dopants on the Morphology and Microstructure of Zinc Oxide Nanoparticles Incorporated Electrospun Poly(acrylonitrile) Based Activated Carbon Nanofibers

The effect of masterbatch pigments on the crystallisation, morphology, and shrinkage behaviour of Isotactic Polypropylene

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