Radiation-induced degradation of an epoxy thermoset supported by hydrogen peroxide

Nowicki, Andrzej; Przybytniak, G.; Legocka, I.; Mirkowski, K.

doi:10.1016/j.radphyschem.2013.04.014

Cited by 11 publications

(1 citation statement)

References 10 publications

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“…( Kerry Thomas, 2007 ) The molecular structures of thermosets, which endow them uniquely favorable stability, ultimately make reprocess ability impossible. Novel approaches for recyclable thermoset design are showing significant promise, ( Gilfrich et al, 1991 ; Ramis and Salla, 1997 ; Nowicki et al, 2014 ; Garcia and Robertson, 2017 ), however these approaches fail to contend with existing waste streams. While the radiation resistance of network polymers has been studied in the past to ensure operational lifetimes are adequate for selected materials ( Nguyen et al, 2018 ; Hong and Chen, 2019 ; Sabu Thomas, 2019 ), radiolysis as an approach to selectively deconstruct macromolecules has not been extensively studied.…”

Section: Introductionmentioning

confidence: 99%

On the Mechanism of the Steady-State Gamma Radiolysis-Induced Scissions of the Phenyl-Vinyl Polyester-Based Resins

et al. 2022

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The major societal problem of polymeric waste necessitates new approaches to break down especially challenging discarded waste streams. Gamma radiation was utilized in conjunction with varying solvent environments in an attempt to discern the efficacy of radiolysis as a tool for the deliberate degradation of model network polyesters. Our EPR results demonstrated that gamma radiolysis of neat resin and in the presence of four widely used solvents induces glycosidic scissions on the backbone of the polyester chains. EPR results clearly show the formation of alkoxy radicals and C-centered radicals as primary intermediate radiolytic products. Despite the protective role of the phenyl groups on the backbone of the radiation-induced polyester chains, the radiolytic-glycosidic scissions predominate. Among the following three solvents used in this study (water, isopropyl alcohol, and dichloromethane), the highest radiolytic yield of glycosidic scission was achieved using water. The •OH radicals produced in the radiolysis of phenyl unsaturated polyester aqueous suspensions very rapidly abstract H atoms from the methylene group, which is followed by a very rapid glycosidic scission. The lowest glycosidic yield was found in the dichloromethane solutions of these polyester resins due to scavenging by the fast electron capture reactions.

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Section: Introductionmentioning

confidence: 99%

On the Mechanism of the Steady-State Gamma Radiolysis-Induced Scissions of the Phenyl-Vinyl Polyester-Based Resins

et al. 2022

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A Novel BST@TPU Membrane with Superior UV Durability for Highly Efficient Daytime Radiative Cooling

Li,

Pattelli,

Ding

et al. 2024

Adv Funct Materials

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Passive radiative cooling technologies play an integral role in advancing sustainable development. While the potential of polymer‐based radiative cooling materials is increasingly recognized, they often degrade under prolonged ultraviolet (UV) radiation exposure, which undermines both their mechanical and radiative cooling performance. To address this challenge, a coaxial electrospinning method to prepare a BST@TPU membrane, with a core layer of strontium barium titanate nanorods (BST NRs) and a shell layer of thermoplastic polyurethane (TPU) is employed. Capitalizing on the UV absorption and free radical adsorption properties of BST NRs, the UV stability of the TPU membrane is significantly increased. Additionally, the inclusion of high refractive index BST NRs compensates for the decrease in reflectivity caused by their UV absorption. After 216 h of continuous 0.7 kW m−2 UV irradiation, the BST@TPU membrane, which initially exhibits a reflectance of 97.2%, demonstrated a modest decline to 92.1%. Its net radiative cooling power maintains 85.78 W m−2 from the initial of 125.21 W m−2, extending the useful lifetime of the TPU membrane threefold. This innovation extends promise for enhancing the efficiency and durability of radiative cooling materials, contributing to sustainable cooling solutions across various applications.

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γ-Ray-sensitive motif-driven versatile epoxy thermoset: Highly efficient radiation degradation, intrinsic flame resistance and sustainable synthesis

Wang

et al. 2022

Chemical Engineering Journal

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Radiation-induced degradation of an epoxy thermoset supported by hydrogen peroxide

Cited by 11 publications

References 10 publications

On the Mechanism of the Steady-State Gamma Radiolysis-Induced Scissions of the Phenyl-Vinyl Polyester-Based Resins

On the Mechanism of the Steady-State Gamma Radiolysis-Induced Scissions of the Phenyl-Vinyl Polyester-Based Resins

A Novel BST@TPU Membrane with Superior UV Durability for Highly Efficient Daytime Radiative Cooling

γ-Ray-sensitive motif-driven versatile epoxy thermoset: Highly efficient radiation degradation, intrinsic flame resistance and sustainable synthesis

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