The effect of di-(-2-ethyl hexyl) phthalate (Dehp) as plasticizer on the thermal and mechanical properties of pvc/pmma blends

Aouachria, Kamira; Quintard, Guilhem; Massardier-Nageotte, Valérie; Belhaneche‐Bensemra, Naïma

doi:10.1590/0104-1428.1588

Cited by 16 publications

(21 citation statements)

References 12 publications

(12 reference statements)

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“…The plastics success is owing to their attractive performances, inexpensive, durable materials, lightweight, recyclable, as well as adjustable properties depending on their formulation [1] . Polyolefins [2] represent a very important family of polymers, constituting more than a third of the total plastics demand in Europe.…”

Section: Introductionmentioning

confidence: 99%

High shear dispersion of tracers in polyolefins for improving their detection

et al. 2015

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SbstractAn efficient recycling of end-of-life products is of crucial interest from an economical and ecological point of view. However, the near infrared spectroscopy often used for the optic sorting processes is limited because of the absorption of carbon black present in black plastics and as it only sorts as a function of chemical formulas. The tracing technology developed in this study is based on the dispersion of lanthanide complexes particles into polymers to give them a code that can be related to their formulation and viscosity that are important parameters for their re-processing. As the success of this technology is conditioned by achieving a fine dispersion of the tracer particles, we also focus on accomplishing a fine dispersion of tracer particles by using a high shear process. Processing under high shear rate (N= 800 rpm) has proved to play a determining role in dispersing finely and homogenously tracer particles within PP matrix. Thanks to the good quality of dispersion, the detection of three tracers at a level of 0.1 wt% has been successfully achieved, even in black matrices for an acquisition time of 10 ms.

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Section: Introductionmentioning

confidence: 99%

High shear dispersion of tracers in polyolefins for improving their detection

et al. 2015

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“…However, the difference (≈9 wt%) in weight loss for (b) and (c) is not proportional to the addition of plasticizer (≈17 wt%). This can be attributed to the fact that both membranes (b) and (c) also show an additional weight loss of ≈10 wt% at the degradation point of DEHP (323 °C) which explains this discrepancy …”

Section: Resultsmentioning

confidence: 99%

“…The higher the content of plasticizer present in the membrane, the easier is the release of HCl and therefore the onset is at lower temperatures (c) than (b) and (a). This is due to the free volume induced by DEHP that allows more efficient release of HCl . The plasticizer penetrates among the polymer molecules and reduces the intermolecular forces of the polymer by increasing the distance between polymer molecules .…”

Section: Resultsmentioning

confidence: 99%

Ammonium across a Selective Polymer Inclusion Membrane: Characterization, Transport, and Selectivity

Casadellà¹,

Schaetzle²,

Loos

2016

Macromol. Rapid Commun.

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The recovery of ammonium from urine requires distinguishing and excluding sodium and potassium. A polymer inclusion membrane selective for ammonium is developed using an ionophore based on pyrazole substituted benzene. The interactions of the components are studied, as well as their effect on transport and selectivity. Spectroscopic and thermogravimetric measurements show no extensive physical interactions of the components, and that the plasticizer reduces the intermolecular forces (rigidity) of the membrane. The ionophore turns the membrane more rigid, although it increases its swelling degree and therefore the affinity of cations. A ratio of plasticizer (DEHP) and polymer (PVC) of 1:3 in mass gives the highest ammonium flux. Tested contents of ionophore (2 and 5 wt%) show that the higher the content of the ionophore, the fastest the flux is (7.5 × 10(-3) mmol cm(-2) h(-1) ). Selectivity of NH4 (+) over Na(+) and over K(+) is reduced from 13.07 to 9.33 and from 14.15 to 9.57 correspondingly.

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“…To sum up, the addition of lanthanide complexes to polymers is of importance as i) it allows their rapid identification by UV fluorescence spectrometry in order to facilitate the sorting and recycling of end-of-life products [1] and ii) limit the degradation of polymers under UV radiations. Thus, increased durability of polymer materials can be obtained by addition of lanthanide complexes such as T2 and T3.…”

Section: Discussionmentioning

confidence: 99%

“…The commercial importance of polymers has lead to very large applications in the form of composites/nanocomposites, polymer blends [1][2][3][4] , such as automotive, aerospace, packaging, etc. Whatever the application and especially outdoor ones, there is often a natural concern regarding the durability of polymer materials.…”

Section: Introductionmentioning

confidence: 99%

Photodegradation of a polypropylene filled with lanthanide complexes

Massardier

Louizi

2015

Polímeros

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SbstractThis research aims at studying the photodegradation of a polypropylene formulation filled with lanthanide complexes. These complexes can be used as tracers for the identification of polymer materials in order to facilitate an high speed automatic sorting of plastic wastes for an economically efficient recycling. By paying attention to the evolution of carbonyl absorption bands in FTIR spectra, it is observed that the addition of lanthanide complexes into our formulation improves UV stability of polypropylene by reducing the extent of photo-degradation. Furthermore, TG analyses show that the traced blends can maintain better thermal properties, after irradiation. A significant increase of the crystallinity degree and a decrease of the melting temperature are more pronounced for the unfilled UV-irradiated PP. This might result from chemi-crystallization that can occur when chain entanglements are broken as a result of chain scissions. From SEM analyses, it is observed that the severity of surface cracks induced by photo degradation is reduced for filled PP. The mechanical tests are in agreement with this result and show a fundamental change in the behavior of the as-exposed blends from a ductile to a brittle material.

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The effect of di-(-2-ethyl hexyl) phthalate (Dehp) as plasticizer on the thermal and mechanical properties of pvc/pmma blends

Cited by 16 publications

References 12 publications

High shear dispersion of tracers in polyolefins for improving their detection

High shear dispersion of tracers in polyolefins for improving their detection

Ammonium across a Selective Polymer Inclusion Membrane: Characterization, Transport, and Selectivity

Photodegradation of a polypropylene filled with lanthanide complexes

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