The Use of Size Exclusion Chromatography in the Studies of Crosslinking and Chain Scission in Polymers

Güven, Olgun

doi:10.1007/978-94-009-1924-2_13

Cited by 2 publications

(2 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Both scission and crosslinking affect the molecular weight distribution of the polymer, and their yields may also be obtained through correlating the molecular weight distribution to the absorbed dose. This effect was analyzed using Equations (1) and (2), where

are number average molecular weights,

are weight averages, and

and

are the number of scission and crosslinking events per 100 eV, respectively [ 26 ]. The subindexes of the molecular weights express the absorbed dose

that the polymer has been exposed to.…”

Section: Methodsmentioning

confidence: 99%

Effect of Gamma Radiation on the Processability of New and Recycled PA-6 Polymers

Niño

Vidal²,

Cerro

et al. 2023

Polymers

View full text Add to dashboard Cite

The growing quantities of plastic waste have raised environmental concerns, with almost a quarter of disposed plastics being sent to landfill. This has motivated research efforts into various recycling technologies to ease dependence on fossil resources, increasing circularity. Irradiation of various kinds, such as electron beam, beta and gamma rays, has been studied in the past as a way of revamping end-of-life polymer properties. The present work focuses on the effects of gamma radiation on the processability of new and recycled polymers, which is intimately linked with their rheological properties. In this study, both virgin and recycled polymers were irradiated under different radiation doses and the effects of the radiation on their viscosity assessed and compared. Results were analyzed making use of different theoretical relationships, and the causes of the changes in rheology were investigated by means of various characterization techniques, such as GPC, FTIR, EPR and DSC. Finally, the rheological curves of all samples were fitted to the Ostwald–de Waele relationship and the dependence of its parameters on the absorbed dose fitted to a function.

show abstract

are number average molecular weights,

are weight averages, and

and

are the number of scission and crosslinking events per 100 eV, respectively [ 26 ]. The subindexes of the molecular weights express the absorbed dose

that the polymer has been exposed to.…”

Section: Methodsmentioning

confidence: 99%

Effect of Gamma Radiation on the Processability of New and Recycled PA-6 Polymers

Niño

Vidal²,

Cerro

et al. 2023

Polymers

View full text Add to dashboard Cite

show abstract

“…These electrons will deposit their energy along their track in the matter. An energy of 10–500 eV can be deposited in a volume of the order of a cubic nanometer, which leads to the generation of free radicals in spurs 10,11 . When ionizing radiations interact with polymers, free radicals are generated.…”

Section: Introductionmentioning

confidence: 99%

Radical detection and electron‐spin resonance (ESR) monitoring in polymer materials irradiated with gamma and X‐rays: Polyethylene and polypropylene

Krieguer,

Marque,

Dorey

et al. 2024

J of Applied Polymer Sci

View full text Add to dashboard Cite

When ionizing radiations interact with polymers, free radicals are generated and are known to be the initiating species for the modification in materials. Monitoring and identifying free radicals after irradiation allow assessing the impact of X‐rays and gamma rays on materials. A comparative study has been performed on materials made from polypropylene and polyethylene after irradiation by the two irradiation technologies. Electron spin resonance (ESR) signal has been monitored up to 380 days when signal was still present. ESR signals, concentration profiles, and kinetics were observed after X‐rays and gamma rays.

show abstract

The Use of Size Exclusion Chromatography in the Studies of Crosslinking and Chain Scission in Polymers

Cited by 2 publications

References 13 publications

Effect of Gamma Radiation on the Processability of New and Recycled PA-6 Polymers

Effect of Gamma Radiation on the Processability of New and Recycled PA-6 Polymers

Radical detection and electron‐spin resonance (ESR) monitoring in polymer materials irradiated with gamma and X‐rays: Polyethylene and polypropylene

Contact Info

Product

Resources

About