Thermo-oxidative aging of low density polyethylene blown films in presence of cellulose nanocrystals and a pro-oxidant additive

Moo-Tun, Nora M.; Valadez-González, Alex; Uribe-Calderón, Jorge

doi:10.1007/s00289-017-2204-y

Cited by 13 publications

(6 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The carbonization of apricot kernels at 850 °C for 1 h in a nitrogen atmosphere allowed us to obtain AC with a surface area of 328.6 m 2 /g, and a micropore volume and size of 0.15 cm 3 /g and 1.62 nm, respectively [ 54 ]. It was found that by increasing the treatment temperature of apricot kernels, the product output reduced, and the percentage content of the carbon and density of carbonizate increased [ 55 ].…”

Section: Resultsmentioning

confidence: 99%

Removing Pollutants from Sewage Waters with Ground Apricot Kernel Shell Material

et al. 2022

View full text Add to dashboard Cite

For the first time, a comprehensive review of the literature data on the use of apricot (Prunus armeniaca) biomass components as a sorption material for the treatment of wastewater and environmental water from various pollutants is carried out in the present study. In addition to a comprehensive analysis of contemporary studies, the current work carried out its own microstructural and energy dispersive studies. It shows that apricot kernel shell is a promising raw material for obtaining sorption materials that can be used to extract various pollutants from aqueous media. The parameters of sorption interaction are presented, at which the highest rate of removal of pollutants was achieved. It is shown that the sorption capacity of apricot biomass components can be increased by modifying it with various chemical reagents, as well as other physical and physicochemical methods. We reveal that most publications consider the use of the latter as a raw material for the production of activated carbons. It is established that the surface area and total pore space of activated carbons from apricot kernel shells depend on the modes of carbonization and activation. It is shown that activated carbons are effective adsorbents for removing various pollutants (metal ions, dyes, oil and oil products) from aqueous media. It was found that the adsorption isotherms of pollutants in most cases are best described by the Langmuir and Freundlich models, and the process kinetics is most often described by the pseudo-second-order model. The possibility of improving the sorption characteristics of apricot biomass during chemical or physicochemical treatment is also shown.

show abstract

Section: Resultsmentioning

confidence: 99%

Removing Pollutants from Sewage Waters with Ground Apricot Kernel Shell Material

et al. 2022

View full text Add to dashboard Cite

show abstract

“…Moreover, the ratios of integrated area for a specific group to that for a reference peak were considered to provide semiquantitative evaluation for polymer aging. For example, the indices of associated and free hydroperoxides were determined according to the following equations: I OOH false( normalassociated false) = A 3410 / A 720 and I OOH false( normalfree false) = A 3550 / A 720 in which A stands for the area of a specific peak. The CI values acquired by I C=O = A 1600–1800 / A 720 could be deconvoluted to the carboxylic acids at 1715 cm –1 ( I C=OOH = A 1715 / A 720 ) and ester groups at 1740 cm –1 ( I C=OO = A 1740 / A 720 ).…”

Section: Characterization For Chain Scission/cross-linking In Acceler...mentioning

confidence: 99%

“…139 Furthermore, XPS could also be applied to evaluate the function of fillers or additives for the aging modulation of polymers. 130,140 The existence of oxygen in the backbone of the polymers, such as polyesters and polyether ketone, has complicated the analysis of C1s and O1s spectra. 141,142 Taking poly(methyl methacrylate) (PMMA) as an example, Wochnowskia et al demonstrated that both C1s and O1s shifted to higher energies upon irradiation as a result of the cross-linked polymer chain through oxygen bridge bonding.…”

Section: Xps Analysis For Polymers Constituted By C H and O Atomsmentioning

confidence: 99%

Section: Characterization For Chain Scission/cross-linking In Acceler...mentioning

confidence: 99%

“…Pseudo in situ XPS was carried out for cross-linked polyisoprene and polychloroprene, and the intensity variations of C1 s spectra were utilized to estimate aging behaviors . Furthermore, XPS could also be applied to evaluate the function of fillers or additives for the aging modulation of polymers. , …”

Section: Characterization For Chain Scission/cross-linking In Acceler...mentioning

confidence: 99%

See 2 more Smart Citations

Characterization Techniques of Polymer Aging: From Beginning to End

Tian

Lin

et al. 2023

Chem. Rev.

View full text Add to dashboard Cite

Polymers have been widely applied in various fields in the daily routines and the manufacturing. Despite the awareness of the aggressive and inevitable aging for the polymers, it still remains a challenge to choose an appropriate characterization strategy for evaluating the aging behaviors. The difficulties lie in the fact that the polymer features from the different aging stages require different characterization methods. In this review, we present an overview of the characterization strategies preferable for the initial, accelerated, and late stages during polymer aging. The optimum strategies have been discussed to characterize the generation of radicals, variation of functional groups, substantial chain scission, formation of low-molecular products, and deterioration in the polymers' macro-performances. In view of the advantages and the limitations of these characterization techniques, their utilization in a strategic approach is considered. In addition, we highlight the structure−property relationship for the aged polymers and provide available guidance for lifetime prediction. This review could allow the readers to be knowledgeable of the features for the polymers in the different aging stages and provide access to choose the optimum characterization techniques. We believe that this review will attract the communities dedicated to materials science and chemistry.

show abstract

Performance of photo-degradation and thermo-degradation of polyethylene with photo-catalysts and thermo-oxidant additives

Wang

et al. 2019

Polym. Bull.

View full text Add to dashboard Cite

Thermo-oxidative aging of low density polyethylene blown films in presence of cellulose nanocrystals and a pro-oxidant additive

Cited by 13 publications

References 31 publications

Removing Pollutants from Sewage Waters with Ground Apricot Kernel Shell Material

Removing Pollutants from Sewage Waters with Ground Apricot Kernel Shell Material

Characterization Techniques of Polymer Aging: From Beginning to End

Performance of photo-degradation and thermo-degradation of polyethylene with photo-catalysts and thermo-oxidant additives

Contact Info

Product

Resources

About