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- W3193199278 abstract "Poly(aryloxyphosphazenes) are thermally stable, insulative, fire proof, and ablative resistant in extreme combustion, and can be applied as an insulated covering of high voltage cable and thermal shielding material for aircraft and spacecraft. However, being an elastomer, its higher glass transition temperature (Tg above −15 °C) limits the application in certain aspects. Therefore, adjustment of the Tg of poly(aryloxyphosphazenes) has become a research focus to improve overall performance. Introducing substituents such as alkoxy groups has been identified as an effective approach to lower the polymer Tg. In this study, based on the introduction of the different ratios of the ethoxy substituents in poly(bisphenoxyphosphazene), a series of simulations and experimental studies have been carried out for predicting the Tg of polyphosphazenes, along with establishing the relationships among synthesis, structure, and Tg. Molecular dynamics (MD) simulations using COMPASS force field and empirical Flory-Fox equation have been used to predict the Tg of the polymers and confirm the compatibility with the experimental data. Overall, the simulation results are noted to be in good agreement with the experimental values, and the Tg of the polymers gradually decreases with an increase in the ethoxy content. The proposed methods are efficient for the prediction of the Tg values of polyphosphazenes and can also be used for the structure prediction via the desired Tg, which is likely to have broad application for targeted polyphosphazenes synthesis." @default.
- W3193199278 created "2021-08-16" @default.
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- W3193199278 date "2021-09-01" @default.
- W3193199278 modified "2023-10-01" @default.
- W3193199278 title "Effect of side groups on glass transition temperatures of Poly(ethoxy/phenoxy)phosphazenes: Prediction and synthesis" @default.
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- W3193199278 doi "https://doi.org/10.1016/j.polymer.2021.124068" @default.
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