Assessment of degradation of plasticized poly(vinyl chloride) films through polyene formation under isothermal conditions

Demir, Ahmet; Ulutan, Sevgi

doi:10.1002/app.46092

Cited by 5 publications

(9 citation statements)

References 21 publications

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“…The formation of polyene products leads to the darkness of the polymer color and can be detected using FTIR spectroscopy (Scheme 2). Increasing the intensity of FTIR spectra of PVC polymer indicates a high degradation extent of the polymer [59]. The extent of degradation determined by polyene factor I C=C is increased by increasing the degrading factor as can be seen in Fig.…”

Section: Suggested Mechanisms Of Photo Stabilization Of Pvcmentioning

confidence: 74%

The inhibition performance of a novel iron (III), copper (II), and nickel (II) complexes with Schiff base ligand derived from salicylaldehyde and p–phenylene diamine on Polyvinyl chloride photodegradation

Mohamed

Negm

Youssef

et al. 2023

Preprint

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The stabilization of polyvinyl chloride polymer has a great concern for researchers due to its high instability in the environmental conditions of heat and ultraviolet arrays. Herein, three metal complexes of Schiff base ligand were prepared and their chemical structures were confirmed using elemental analysis, FTIR, 1H-NMR, and UV/Vis spectra. The prepared metal complexes were incorporated in PVC as photo-stabilizers. Only 0.5% by weight of these prepared Schiff bases metal complexes was blended with the PVC polymer to form films with a width of (50 µm). The prepared samples were exposed to ultraviolet irradiation time was varied ranging from 0 to 300 h and the impact of irradiation scheduled upon the PVC stabilization was examined each 50 h. The degree of degradation of PVC in the presence and absence of the different stabilizers was determined using various techniques, including the degree of oxygenated compounds formed, degree of unsaturation, viscosity, and degree of deterioration. The results showed that in the native PVC, the degradation progressively increased over time at the conditions of the experiments. The addition of the stabilizers decreased the degradation considerably. The formation of carbonyl, hydroxyl, and unsaturated intermediates was decreased in the presence of Cu-L, and Ni-L. While Fe-L stabilizer showed weak efficiency. The reasons for the stabilization and the mechanism of the degradation/stabilization processes were discussed based on the electronegativity of the metal ions and the antioxidant activities of the different metal complexes.

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Section: Suggested Mechanisms Of Photo Stabilization Of Pvcmentioning

confidence: 74%

The inhibition performance of a novel iron (III), copper (II), and nickel (II) complexes with Schiff base ligand derived from salicylaldehyde and p–phenylene diamine on Polyvinyl chloride photodegradation

Mohamed

Negm

Youssef

et al. 2023

Preprint

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“…Plastisols were prepared with 60 phr (named as phr; part per hundred resins) DOTP, 5 phr ESBO, 3 phr thermal stabilizers and 2 phr filler into pre dried 100 phr PVC resin, on the mass basis. The ingredients were blended by a steel mixer (8011 EB, SS 610) to obtain a homogeneous mixture, called paste or plastisol 26 …”

Section: Methodsmentioning

confidence: 99%

“…The ingredients were blended by a steel mixer (8011 EB, SS 610) to obtain a homogeneous mixture, called paste or plastisol. 26…”

Section: Plastisol Preparationmentioning

confidence: 99%

Assessment of the effect on the plasticizer diffusion of inorganic fillers in plasticized poly(vinyl chloride) composite films for cable sheath applications

Demir

Ergün

2023

J of Applied Polymer Sci

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In cable sheath applications, plasticizer migration is important as it causes reduction in mechanical properties, deterioration, and pollution in transported environments. This study focuses on the effect of inorganic fillers on the diffusion of plasticizers from plasticized‐PVC cable films. Plastisols were prepared by mixing plasticizer, thermal stabilizers, and inorganic fillers (boric acid, boron clay, sintered calcined boron waste clay, talc, and zircon oxide) into the PVC resin. Plastigel films were cured and thermally aged at 100, 130, and 160°C. Oxidation index were determined by Fourier transform infrared spectroscopy. The diffusion coefficient and activation energies were calculated from mass loss. Thermogravimetric analysis analyses were performed to obtain weight loss. Fillers were characterized for their zeta potential, particle size distribution, polydispersion. Morphology of the fillers was also conducted using scanning electron microscopy. Their mechanical and rheological analyses were evaluated with the tensile and melt flow index test. The order of diffusivity was determined as the films having boric acid > undoped > talc = sintered boron clay > zircon > boron clay. The result of this evaluations is the addition of inorganic filler increases the mechanical and thermal applicability and reduces the plasticizer diffusion. It is thought that the results, will contribute to the studies on the plasticizer transition in cable applications.

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“…Polyenes including five and six C C groups are deca and dimethyl dodeca hexanes observed at 335 and 360 nm, and polyenes including seven to nine C C groups are dihydrocarotene, lycopene, and dihydroxy-copene observed at 415, 470, and 504 nm, respectively. 44 All of the p-PVC films with DOTP and ESBO showed the same tendency of very high T A B L E 3 Independent variable (X 1 : amount of boron waste sludge (2-6 phr), X 2 : amount of heat stabilizer (2-6 phr), X 3 : amount of plasticizer (50-70 phr), and coded values. absorbance, which correspond to the formation of polyene at about 200-330 nm on their UV spectra.…”

Section: Evaluation Of Polyenes Formed By Degradation Of Pvc Using Sp...mentioning

confidence: 99%

“…Since thermal dehydrochlorination is a first order reaction, 16,44 Equation ( 6) was obtained: where k 1 is the reaction rate constant, t is time, and N db is the mol fraction of CDBs.…”

Section: Degradation Kinetics For Dehydrochlorination Reaction Of Pvcmentioning

confidence: 99%

Optimization of thermal degradation performance of plasticized poly(vinyl chloride)‐boron composite films using response surface methodology

Çiğdem

Demir

2023

J of Applied Polymer Sci

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This work aims to statistically assess the dehydrochlorination of plasticized poly(vinyl chloride) (p‐PVC) films produced using boron waste sludge, heat stabilizer mixture (Ca‐ZnSt2), and plasticizer (dioctyl terephthalate). This study also focuses on providing information about the effect of boron waste sludge (BSW), heat stabilizer, and plasticizer amounts on the degradation of the films to enhance the thermal stability of flexible p‐PVC formulations. Experiments were designed using the Box‐Wilson method. The polyene formation and discoloration caused by the degradation were measured by UV spectroscopy and colorimetry, respectively. These parameters were optimized using the response surface methodology. An analysis of variance was performed to assess statistically significant differences between the parameters on p‐PVC degradation by using the Design Expert 13 statistical program. The yellowness index and amount of polyene formed differed among the films, and the film prepared at the midpoint of all parameters was determined to have greater stabilizing efficiency than the others. In this study, an effort has been made to shed light on the improvements in thermal stability in PVC. Results will serve to protect the environment via the data provided to the producers. The use of boron waste will contribute to the environment and the economy.

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Assessment of degradation of plasticized poly(vinyl chloride) films through polyene formation under isothermal conditions

Cited by 5 publications

References 21 publications

The inhibition performance of a novel iron (III), copper (II), and nickel (II) complexes with Schiff base ligand derived from salicylaldehyde and p–phenylene diamine on Polyvinyl chloride photodegradation

The inhibition performance of a novel iron (III), copper (II), and nickel (II) complexes with Schiff base ligand derived from salicylaldehyde and p–phenylene diamine on Polyvinyl chloride photodegradation

Assessment of the effect on the plasticizer diffusion of inorganic fillers in plasticized poly(vinyl chloride) composite films for cable sheath applications

Optimization of thermal degradation performance of plasticized poly(vinyl chloride)‐boron composite films using response surface methodology

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