General Information About Pyrolysis

Moldoveanu, Serban C.

doi:10.1016/b978-0-444-64000-0.00001-9

Cited by 12 publications

(8 citation statements)

References 56 publications

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“…Analytical techniques based on pyrolysis have proven particularly successful to investigate the degradation process of several polymers as well as their blends, since information is provided at a molecular level on these complex polymeric systems by examining their pyrolytic products. In fact, the latter are small volatile molecules formed by selective bond cleavage induced by thermal energy [ 46 ]. Once coupled with gas chromatography (GC) and mass spectrometry (MS), thermoanalytical pathway is highly sensitive, requires small masses and a minimum sample preparation while the analysis time is generally short.…”

Section: Resultsmentioning

confidence: 99%

Thermal Stability and Decomposition Mechanism of PLA Nanocomposites with Kraft Lignin and Tannin

et al. 2021

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Packaging applications cover approximately 40% of the total plastics production, whereas food packaging possesses a high proportion within this context. Due to several environmental concerns, petroleum-based polymers have been shifted to their biobased counterparts. Poly(lactic acid) (PLA) has been proved the most dynamic biobased candidate as a substitute of the conventional polymers. Despite its numerous merits, PLA exhibits some limitations, and thus reinforcing agents are commonly investigated as fillers to ameliorate several characteristics. In the present study, two series of PLA-based nanocomposites filled with biobased kraft-lignin (KL) and tannin (T) in different contents were prepared. A melt–extrusion method was pursued for nanocomposites preparation. The thermal stability of the prepared nanocomposites was examined by Thermogravimetric Analysis, while thermal degradation kinetics was applied to deepen this process. Pyrolysis–Gas Chromatography/Mass Spectrometry was employed to provide more details of the degradation process of PLA filled with the two polyphenolic fillers. It was found that the PLA/lignin nanocomposites show better thermostability than neat PLA, while tannin filler has a small catalytic effect that can reduce the thermal stability of PLA. The calculated Eα value of PLA-T nanocomposite was lower than that of PLA-KL resulting in a substantially higher decomposition rate constant, which accelerate the thermal degradation.

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Section: Resultsmentioning

confidence: 99%

Thermal Stability and Decomposition Mechanism of PLA Nanocomposites with Kraft Lignin and Tannin

et al. 2021

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“…The global production of plastics, polymer resins, and fibers, in the year 2015 was estimated as 381 million metric tons (MT), which increased by 75% in the year 2020 (Lee et al, 2020;Moldoveanu, 2019). It was also estimated that the global plastic waste generation in 2025 will increase to 9-13% of total Municipal Solid Waste (MSW) (Raman Sharma & Sharma, 2014).…”

Section: Introductionmentioning

confidence: 99%

Thermic pyrolysis of polypropylene waste as a source of fuel

Palmay

Morocho-Delgado²,

Puente-Guijarro³

et al. 2021

RMIQ

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“…Generally, if the absorption coefficient of the polymer with respect to the external radiation is large, the temperature of the polymer surface becomes high and thermal decomposition occurs by free radical chain elimination, evolving non-combustible as well as combustible gases, which further encourage burning. These elimination reactions include random or chain end-initiated scissoring of the weakest bonds in the bridging groups connecting the aromatic rings or heterocycles, propagation and termination reactions, ending up with the formation of char in the condensed phase [40,41]. In general, the burning of polymers can be characterized by four components: heat, the oxidizing agent, the fuel (polymer) and an uninhibited chemical chain reaction.…”

Section: Thermal Degradation Of Polymersmentioning

confidence: 99%

Layer-by-Layer Deposition: A Promising Environmentally Benign Flame-Retardant Treatment for Cotton, Polyester, Polyamide and Blended Textiles

et al. 2022

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A detailed review of recent developments of layer-by-layer (LbL) deposition as a promising approach to reduce flammability of the most widely used fibers (cotton, polyester, polyamide and their blends) is presented. LbL deposition is an emerging green technology, showing numerous advantages over current commercially available finishing processes due to the use of water as a solvent for a variety of active substances. For flame-retardant (FR) purposes, different ingredients are able to build oppositely charged layers at very low concentrations in water (e.g., small organic molecules and macromolecules from renewable sources, inorganic compounds, metallic or oxide colloids, etc.). Since the layers on a textile substrate are bonded with pH and ion-sensitive electrostatic forces, the greatest technological drawback of LbL deposition for FR finishing is its non-resistance to washing cycles. Several possibilities of laundering durability improvements by different pre-treatments, as well as post-treatments to form covalent bonds between the layers, are presented in this review.

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General Information About Pyrolysis

Cited by 12 publications

References 56 publications

Thermal Stability and Decomposition Mechanism of PLA Nanocomposites with Kraft Lignin and Tannin

Thermal Stability and Decomposition Mechanism of PLA Nanocomposites with Kraft Lignin and Tannin

Thermic pyrolysis of polypropylene waste as a source of fuel

Layer-by-Layer Deposition: A Promising Environmentally Benign Flame-Retardant Treatment for Cotton, Polyester, Polyamide and Blended Textiles

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