Coupling effects of gamma irradiation and moisture on the properties of SiO2 and TiO2 filled silicone rubber

Qin, Zi-Ming; Wang, Pu‐Cheng; Chen, Hong‐Bing

doi:10.1016/j.radphyschem.2022.110190

Radiation Physics and Chemistry

2022

DOI: 10.1016/j.radphyschem.2022.110190

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Coupling effects of gamma irradiation and moisture on the properties of SiO2 and TiO2 filled silicone rubber

Zi-Ming Qin

Pu‐Cheng Wang

Hong‐Bing Chen

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Cited by 3 publications

References 19 publications

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Enhanced mechanical property of polyethylene wax/gadolinium oxide/methyl vinyl silicone rubber composites via gamma irradiation

Xin,

Dai,

Qian

et al. 2024

Polymer Composites

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The properties of rubber can be changed by controlling the radiation conditions, so as to be suitable for specific application scenarios. This study compares the structure, mechanical properties, cross‐linking density, thermal properties, and shielding properties of polyethylene wax/gadolinium oxide/methyl vinyl silicone rubber (PEW/Gd2O3/MVQ) under different radiation doses and atmospheric conditions. The results showed that the tensile strength of the neutron shielding rubber exhibited growth and subsequently decreased with increasing irradiation dosage, and the tensile strength reached the optimum value of 8.29 MPa after 25 kGy in air. The hardness and cross‐linking density of the sample increase with the increase of the dose, and especially the hardness and cross‐linking density of the sample irradiated in the air atmosphere at 25 kGy were better than that in the vacuum. The addition of PEW to the rubber significantly increased the thermal neutron‐shielding rate, from 74.10% to 86.59% when 36 phr of Gd2O3 was added. The thermal neutron‐shielding rate increased from 84.42% to 88.39% when irradiated 50 kGy in air. It was found that the comprehensive performance of the rubber was optimized after irradiation of 25 kGy in the air atmosphere.Highlights The mechanical properties of rubber are enhanced by low‐dose irradiation in air. Irradiation of rubber in air is superior to irradiation in vacuum, with optimal results at 25 kGy. Rubber maintains thermal stability at low doses of irradiation. The addition of PEW improves the shielding properties. Rubber retains excellent thermal neutron‐shielding properties after irradiation.

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Enhanced mechanical property of polyethylene wax/gadolinium oxide/methyl vinyl silicone rubber composites via gamma irradiation

Xin,

Dai,

Qian

et al. 2024

Polymer Composites

View full text Add to dashboard Cite

show abstract

Radiation softening and hardening of PDMS in combined neutron and γ rays

Durďáková

Hrdlička

Král

et al. 2023

Polymer Degradation and Stability

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Molecular dynamic study of radiation-moisture aging effects on the interface properties of nano-silica/silicone rubber composites

2023

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The influence of radiation-moisture aging on the thermodynamic and interface properties of nano-silica/silicone rubber (PDMS) composites was investigated using molecular dynamics simulation. The deterioration of polymer matrix was incorporated into the PDMS-silica interface models based on the hydrolysis products and the dominant role of cross-linking over chain scission. The results indicate that the long-chain structure with the higher molecular weight and the stronger intermolecular interactions are formed by incorporating multi-chain cross-linking and more hydroxyl groups. The coupling effects of the long-chain structure and stronger intermolecular interactions enhance the binding strength between the silica and PDMS matrix owing to the formation of more hydrogen bonds, and restrict the diffusion mobility of PDMS chains and water molecules. The aging of the PDMS matrix facilitates water molecules to adsorb on the surface of the silica and the PDMS matrix to form hydrogen bonds, and eventually weakens the bonding strength of the silica-PDMS interface.

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Coupling effects of gamma irradiation and moisture on the properties of SiO2 and TiO2 filled silicone rubber

Cited by 3 publications

References 19 publications

Enhanced mechanical property of polyethylene wax/gadolinium oxide/methyl vinyl silicone rubber composites via gamma irradiation

Enhanced mechanical property of polyethylene wax/gadolinium oxide/methyl vinyl silicone rubber composites via gamma irradiation

Radiation softening and hardening of PDMS in combined neutron and γ rays

Molecular dynamic study of radiation-moisture aging effects on the interface properties of nano-silica/silicone rubber composites

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