Role of pigments in the stability of polyethylene systems

Maatoug, Maatoug A.; Anna, P.; Bertalan, György; Ravadits, I.; Marosi, György; Csontos, István; Márton, A.; Tóth, A.

doi:10.1002/1439-2054(20001001)282:1<30::aid-mame30>3.0.co;2-9

Cited by 26 publications

(6 citation statements)

References 10 publications

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“…Surprisingly, after the surfactant backside exposure, the degradation effects seem to be smaller. Maatoug et al 12 reported a similar effect for pigmented HDPE systems. Perhaps, the oxygen diffusion is inhibited by the surfactant.…”

Section: Materials Imentioning

confidence: 73%

Combined Impact of Ultraviolet and Chemical Fluids on High‐density Polyethylene Packaging Material

2011

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To investigate the ageing behaviour of filled plastic containers outdoors, square cuts of the wall of two high‐density polyethylene (HDPE) types were exposed to ultraviolet (UV) radiation at their front side and to specific liquid chemicals (de‐ionized water, surfactant or White Spirit) at their back. The UV radiant exposure at the front side was 80 MJ/m². To compare the actions of the different exposures, separate dark backside fluid exposures were performed, in parallel. Besides, UV weathering was carried out until a UV radiant exposure of 325 MJ/m², being roughly comparable to outdoor exposure of one year in Northern Australia. An unpigmented HDPE included in the investigation gave no sufficient protection for the White Spirit. In addition, it showed clear degradation after several of these exposures. In combination with the White Spirit, an increase of carbonyl bonds was measured, presumably assignable to degradation products of the White Spirit. For a pigmented HDPE material, with the implemented combined exposures, no relevant damage was observed, within applied the exposure period. Copyright © 2011 John Wiley & Sons, Ltd.

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Section: Materials Imentioning

confidence: 73%

Combined Impact of Ultraviolet and Chemical Fluids on High‐density Polyethylene Packaging Material

2011

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“…Polymeric materials, which are exposed to solar ultraviolet (UV) radiation, heat, and moisture, despite of other stress parameters, degrade through processes known as weathering . Weathering of polymeric materials has been the most challenging issue in recent years and due to the increasing use of these substances, their degradation or stability processes has become an area of intense investigations . Among these materials, poly(vinyl chloride) (PVC) with a huge production rate (34 million tons per year) and its good properties such as low production cost, good process ability, and easy modification have been the most interested polymeric materials in research area to study its degradation and stability features .…”

Section: Introductionmentioning

confidence: 99%

Kinetic study of the poly(vinyl chloride)/titanium dioxide nanocomposites photodegradation under accelerated ultraviolet and visible light exposure

Mehmandoust

Alizadeh

Babaluo

2014

Polym. Adv. Technol.

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In the present study, poly(vinyl chloride)/titanium dioxide (PVC/TiO2) nanocomposite films containing different amounts of synthesized TiO2 nanoparticles and commercial rutile powder were irradiated for 5112 hr, under exposure of artificial ultraviolet and visible lights in three different intensities. The rate of degradation was determined by using weight loss data and was found to follow a pseudo‐first order kinetic model. To determine the overall rate constant of degradation, k, a possible mechanism of the photodegradation was considered. The rate equation demonstrated k as a function of TiO2 concentration and irradiation intensity at each wavelength. The overall rate constant of PVC/TiO2 samples were calculated to be varied in the range of 6–16 × 10−7 hr−1, at all investigated conditions. The kinetic study represented that by adding synthesized TiO2 nanoparticles, even at low content, and with increasing their concentration, the photodegradation rate of nanocomposites decreased considerably compared with the composite samples. Likewise, by adding nanoparticles, a significant increase in the nanocomposites lifetime was achieved. The effect of irradiation intensity was investigated according to the reciprocity law experiments, and it was found that photodegradation occurred in two regimes with respect to irradiation intensity. The calculated overall rate constants were validated by the experimental data. Copyright © 2014 John Wiley & Sons, Ltd.

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“…Compatibility, mechanical properties, stability, and transport characteristics could be affected by the modification of inter-faces [3]. This is the way to improve the compatibility and to control the behavior of multi-component systems [4,5].…”

Section: Introductionmentioning

confidence: 99%

Preparation of Al(OH)3/Acrylic Copolymer Latex by Emulsion Polymerization

Park

Jeong

Lee

et al. 2010

Composite Interfaces

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The Al(OH) 3 /acrylic copolymer latexes were synthesized through the emulsion polymerization of acrylic monomers, butyl acrylate and 2-ethylhexyl acrylate in the presence of surface-functionalized Al(OH) 3 filler particles. The polymerization was stabilized by polyoxyethylene (50) nonyl phenyl ether (NP-1050, nonionic surfactant) and ammonium (POE) alkyl aryl ether sulfate (EU-S133D, anionic surfactant) to produce stable composite latexes. The improved compatibility of Al(OH) 3 surface with acrylic monomers was achieved by the modification with 3-(trimethoxysilyl) propyl methacrylate (γ -MPS). Transmission electron microscopy showed that nano-sized Al(OH) 3 particles were slightly agglomerated in the copolymer latex. When pristine Al(OH) 3 was used as a filler or γ -MPS-modified Al(OH) 3 particles were added above 30 wt% with respect to monomers, unstable latexes were obtained, which were partially precipitated out on standing for prolonged time. The flame retardation effect was not apparent with the incorporation of Al(OH) 3 in the latexes by 30 wt% as shown by LOI test.

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Role of pigments in the stability of polyethylene systems

Abstract: Cross-linked fraction of artificially aged HDPE samples containing phthalocyanine based (VV Green) and TiO 2 based (SV White) pigments.

Cited by 26 publications

References 10 publications

Combined Impact of Ultraviolet and Chemical Fluids on High‐density Polyethylene Packaging Material

Combined Impact of Ultraviolet and Chemical Fluids on High‐density Polyethylene Packaging Material

Kinetic study of the poly(vinyl chloride)/titanium dioxide nanocomposites photodegradation under accelerated ultraviolet and visible light exposure

Preparation of Al(OH)3/Acrylic Copolymer Latex by Emulsion Polymerization

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