Degradation and Stabilization of Poly(vinyl Chloride)

Yassin, Ahmady A.; Sabaa, Magdy W.

doi:10.1080/07366579008050916

Cited by 75 publications

(34 citation statements)

References 167 publications

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“…This leads to increase in the polarization of the investigated sample . This significant dependency of ε ′ on temperature has previously been observed for PVC composites . Such dependency has been interpreted in view of 2 different temperature stages.…”

Section: Resultssupporting

confidence: 75%

Dielectric spectroscopic analysis of polyvinyl chloride nanocomposites loaded with Fe₂O₃ nanocrystals

Mansour

Elsad

Izzularab

2018

Polymers for Advanced Techs

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Iron oxide (α‐Fe2O3) nanocrystals powder was successfully synthesized via the sol‐gel method. The microstructural examination of the synthesized nanocrystals confirmed the formation of α‐Fe2O3 (hematite) structure using X‐ray diffraction and Fourier transform infrared. The synthesized nano‐hematite powder with different weight percentage up to 5 wt% was introduced to polyvinyl chloride (PVC) to fabricate PVC/Fe2O3 nanocomposites using the solution‐cast technique. The dielectric spectroscopic analysis for the investigated samples has been studied at room temperature and at different temperatures up to 120°C. The real part of the permittivity (ε′) exhibited a significant dependence on filler concentrations throughout whole temperature range. However, the dependency of both of the loss tangent (tanδ) and AC conductivity (σac) on filler concentrations is more pronounced at temperatures higher than room temperature. The obtained values of tan δ for the investigated nancomposites referred to the α‐relaxation around 70°C, which is close to glass transition temperature of the investigated PVC. The dependency of the dielectric strength on Fe2O3 nanofiller concentration was observed with enhancement in the dielectric strength reach to 20.5% for PVC/0.7 wt% Fe2O3 nanocomposite higher than the recorded value for the pristine PVC.

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Section: Resultssupporting

confidence: 75%

Dielectric spectroscopic analysis of polyvinyl chloride nanocomposites loaded with Fe₂O₃ nanocrystals

Mansour

Elsad

Izzularab

2018

Polymers for Advanced Techs

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“…Above 623 K, the dechlorinated polymer undergoes further cracking and pyrolysis to linear and cyclic compounds while the aromatic-to-aliphatic hydrocarbon ratio is reversed above 803 K. [106,107] The feasibility of a catalytic dechlorination of PVC using a batch reactor system (see Figure 5) designed to operate at pressures up to 10 atm and temperatures (with the facility for a controlled temperature ramping) of up to 723 K has been demonstrated. [104,108] The 1 dm 3 continuously stirred tank reactor (CSTR) can accommodate a starting PVC mass of up to 100 g. Inert (He or Ar) and/or hydrogen gases are delivered to the CSTR via a sparger tube located below the impeller blade, where stirring speeds of up to 1500 rpm are required for effective mixing.…”

Section: Catalytic Treatment Of Halogenated Polymers: Focus On Pvcmentioning

confidence: 99%

Catalytic Transformation of Waste Polymers to Fuel Oil

Keane

2009

ChemSusChem

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Waste not, want not: The increase in waste polymer generation, which continues to exceed recycle, represents a critical environmental burden. However, plastic waste may be viewed as a potential resource and, with the correct treatment, can serve as hydrocarbon raw material or as fuel oil, as described in this Minireview.Effective waste management must address waste reduction, reuse, recovery, and recycle. The consumption of plastics continues to grow, and, while plastic recycle has seen a significant increase since the early 1990s, consumption still far exceeds recycle. However, waste plastic can be viewed as a potential resource and can serve, with the correct treatment, as hydrocarbon raw material or as fuel oil. This Minireview considers the role of catalysis in waste polymer reprocessing and provides a critical overview of the existing waste plastic treatment technologies. Thermal pyrolysis results in a random scissioning of the polymer chains, generating products with varying molecular weights. Catalytic degradation provides control over the product composition/distribution and serves to lower significantly the degradation temperature. Incineration of waste PVC is very energy demanding and can result in the formation of toxic chloro emissions. The efficacy of a catalytic transformation of PVC is also discussed.

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“…PVC is used in clothing, household sewerage pipes, window and door frames, and electrical purposes. PVC has less thermal stability at higher temperatures [35]. The thermal stability along with other properties can be improved by making composites with fillers like clay [36], metal oxides [37], and different types of cellulosic powders [38].…”

Section: Wpbp As Reinforcing Agent In Polymer Compositesmentioning

confidence: 99%

Valorization and Miscellaneous Prospects of WasteMusa balbisianaColla Pseudostem

Gogoi

Phukan

Dutta

et al. 2014

Journal of Waste Management

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Resourceful utilization of the enormous quantum of agrowastes generated via agricultural practices can be supportive in waste management, environmental upgradation, and subsequent material and energy recovery. In this regard, the present study aimed at highlighting waste banana (Musa balbisiana Colla) pseudostem (an agrowaste) as a potential bio-based feedstock with miscellaneous applications. The pseudostem was characterized by carbon, nitrogen, and hydrogen (CHN) analysis, thermogravimetric-differential thermal analysis (TGDTA), and Fourier transform infrared (FTIR) spectroscopy. Cellulose, hemicellulose, and lignin were estimated as a part of biochemical characterization. Total phenolic content, total flavonoid content, 1, 1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging assay, and ferric reducing antioxidant power (FRAP) were carried out as a part of antioxidant characterization. The waste banana pseudostem biomass (WBPB) was also tried successfully as a natural filler in polyvinyl chloride (PVC) polymer composite. Thermal properties and water uptake test of the WBPB polymer composite were accessed as a part of composite characterization. The pseudostem had calorific value (15.22 MJ/kg), high holocellulose (58.67%), high free radical scavenging potential (69.9%), and a low ash content (6.8%). Additionally, the WBPB polymer composite showed improved water resistance and thermostability. The study suggests feasibility of WBPB as a prospective bioenergy feedstock, primary antioxidant source, and reinforcing agent in polymer composites.

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Degradation and Stabilization of Poly(vinyl Chloride)

Cited by 75 publications

References 167 publications

Dielectric spectroscopic analysis of polyvinyl chloride nanocomposites loaded with Fe₂O₃ nanocrystals

Dielectric spectroscopic analysis of polyvinyl chloride nanocomposites loaded with Fe₂O₃ nanocrystals

Catalytic Transformation of Waste Polymers to Fuel Oil

Valorization and Miscellaneous Prospects of WasteMusa balbisianaColla Pseudostem

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Degradation and Stabilization of Poly(vinyl Chloride)

Cited by 75 publications

References 167 publications

Dielectric spectroscopic analysis of polyvinyl chloride nanocomposites loaded with Fe2O3 nanocrystals

Dielectric spectroscopic analysis of polyvinyl chloride nanocomposites loaded with Fe2O3 nanocrystals

Catalytic Transformation of Waste Polymers to Fuel Oil

Valorization and Miscellaneous Prospects of WasteMusa balbisianaColla Pseudostem

Contact Info

Product

Resources

About

Dielectric spectroscopic analysis of polyvinyl chloride nanocomposites loaded with Fe₂O₃ nanocrystals

Dielectric spectroscopic analysis of polyvinyl chloride nanocomposites loaded with Fe₂O₃ nanocrystals