Thermoanalytical investigations for the recycling of PVC

Matuschek, G.; Milanov, N.; Kettrup, A.

doi:10.1016/s0040-6031(00)00549-9

Cited by 34 publications

(14 citation statements)

References 4 publications

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“…The plasticizer evaporation involves the creation of voids around the chlorine atoms making their release and diffusion easier. These results are in agreement with those reported earlier [12] . The release of phthalate-based plasticizer along with the release of HCl from PVC in the range 320-340°C displayed similar behavior.…”

Section: Aouachria K Et Al -The Effect Of Di-(-2-ethyl Hexyl) Phthsupporting

confidence: 94%

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

et al. 2014

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Plasticizers play a key role in the formulation of polymers and in determining their physical properties and processability. This study examines the effect of di(2-ethyl hexyl)phthalate (DEHP) as plasticizer on the thermal and mechanical properties of PVC/PMMA blends. For that purpose, blends of variable composition, from 0 to 100 wt%, were prepared in the presence (15, 30 and 50 wt %) and in the absence of di(2-ethyl hexyl)phthalate. The thermal degradation of the blends was investigated by thermogravimetric analysis (TGA) in an atmosphere of synthetic air in the temperature range of 50-550°C. The variation of the mechanical properties, such as tensile behavior, hardness and impact resistance, were investigated for all blend compositions. The effect of the plasticizer on the same properties was considered. The results obtained show that a range of properties can be generated according to the blend compositions. Therefore, the addition of PMMA to the blends stabilized PVC, for the initial thermal degradation, and the addition of the plasticizer caused a decrease of stress at break and Young modulus.

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Section: Aouachria K Et Al -The Effect Of Di-(-2-ethyl Hexyl) Phthsupporting

confidence: 94%

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

et al. 2014

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“…Above the processing temperature, the thermal decomposition (pyrolysis) of PVC occurs in two major steps. First, HCl eliminates from the polymer in conjunction with the simultaneous formation of polyenes in the chain accompanied with the evolution of low amounts of volatile organic compounds up to about 330 o C (20)(21)(22)(23)(24)(25)(26)(27)(28)(29). In the second step above this temperature, the breakdown of the remaining material leading to various compounds takes place (27-30).…”

Section: Introductionmentioning

confidence: 99%

“…20-29 and references therein). However, while intensive research has been carried out on thermogravimetry with primary PVC products and corresponding experimental samples, only few studies have dealt with the thermal analysis of recycled PVCs (21)(22)(23). The results of the existing investigations clearly indicate the complexity of the degradation process of such PVCs, because of the different kinds of additives and processing conditions commonly used for PVC production have significant influence on the degradation reactions, thus on the stability of PVCs considered for reuse and reprocessing during recycling.…”

Section: Introductionmentioning

confidence: 99%

Thermal Properties, Degradation and Stability of Poly(vinyl chloride) Predegraded Thermooxidatively in the Presence of Dioctyl Phthalate Plasticizer

Szarka

Iván

2013

Journal of Macromolecular Science, Part A

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Thermooxidative degradation of poly(vinyl chloride) (PVC) is inevitable during processing of PVC. Recycling of this polymer requires reprocessing in most of the cases, and due to the low thermal stability of PVC, it is of paramount importance to reveal the effect of thermooxidation on the thermal stability of this commercially important polymer. However, detailed systematic investigations are lacking on this crucial problem. In this study, the thermal behavior of PVCs thermooxidized in dilute dioctyl phthalate (DOP) (di(2-ethylhexyl) phthalate, DEHP) plasticizer was investigated by DSC, thermal gravimetry and isothermal degradation under inert atmosphere. It was found that thermooxidation leads to PVCs with certain extent of internal plasticization by DOP chemically bound to the PVC chains and by the oxidized chain segments as well. These striking results also indicate that the decreased thermal stability caused by thermooxidation in the course of the primary processing of this polymer should be taken into account in order to efficiently stabilize PVC products for reprocessing and recycling.2

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“…The characteristics of thermal decomposition and the volatile content are investigated by TGA, as shown in Figure 3. All samples have an initial weight loss at around 260°C, implying that most HCl components including dehydrochlorination are decomposed at this temperature [17]. As the contents of the recycled PVC increase, the second and the third decomposition temperatures slightly shifted to a higher temperature.…”

Section: Specimens and Experimentsmentioning

confidence: 96%

Investigation of fatigue and mechanical properties of the pipe grade poly(vinyl chloride) using recycled scraps

Lee¹,

Moon²,

Lee³

et al. 2015

Express Polym. Lett.

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Thermoanalytical investigations for the recycling of PVC

Cited by 34 publications

References 4 publications

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

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

Thermal Properties, Degradation and Stability of Poly(vinyl chloride) Predegraded Thermooxidatively in the Presence of Dioctyl Phthalate Plasticizer

Investigation of fatigue and mechanical properties of the pipe grade poly(vinyl chloride) using recycled scraps

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