Degradation and stability studies of butadiene rubber: Correlation between experimental and computational values

Mohanty, Subhra; Prabhu, Parashiva; Kumar, Amit; Venkateswaran, Natarajan; Gupta, Virendra Kumar

doi:10.1016/j.mtcomm.2023.107558

Materials Today Communications

2023

DOI: 10.1016/j.mtcomm.2023.107558

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Degradation and stability studies of butadiene rubber: Correlation between experimental and computational values

Subhra Mohanty,

Parashiva Prabhu,

Amit Kumar

et al.

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2024

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Thermal Degradation Behavior of Thermally‐Oxidized Hydroxyl‐Terminated Polybutadiene (HTPB): An Assessment of Thermal Stability

Irfan,

Xiao

2024

ChemistrySelect

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Thermal analysis was performed on different thermally oxidized hydroxyl‐terminated polybutadiene (HTPB) samples, varying in molecular weights, polydispersities, and viscosities. The HTPB sample was subjected to thermal ageing at 65 °C for 10 weeks and periodically withdrawn for thermal analysis. During thermal ageing, HTPB undergoes chain rearrangements that may include scission and subsequent crosslinking, leading to a higher average molecular weight and viscosity. Differential scanning calorimeter (DSC) and thermogravimetric analyses were performed on thermally oxidized HTPB samples under inert heating conditions to investigate their degradation behavior. The DSC results revealed no significant correlations between the glass transition (Tg) and the samples' molecular weight, viscosity, and polydispersity. In TGA, all HTPB samples showed a two‐step thermal decomposition process characterized by two distinct mass loss stages. Notably, the first stage exhibited a lower total mass loss and a considerably lower peak rate of mass loss than the second stage. The thermal stability of HTPB is significantly compromised by thermal‐oxidative degradation, leading to a pronounced decrease in the initial degradation temperature (TIDT) values, from 372 °C (pristine or 0 week) to 228 °C (10 weeks). Furthermore, we measured the energy of activation (Ea) and the pre‐exponential factor (A) from TGA data using the Coats–Redfern integral equation. Notably, we observed a slight but systematic increase in both Ea and A as the molecular weight of the aged samples increased.

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Thermal Degradation Behavior of Thermally‐Oxidized Hydroxyl‐Terminated Polybutadiene (HTPB): An Assessment of Thermal Stability

Irfan,

Xiao

2024

ChemistrySelect

View full text Add to dashboard Cite

show abstract

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Degradation and stability studies of butadiene rubber: Correlation between experimental and computational values

Cited by 1 publication

References 14 publications

Thermal Degradation Behavior of Thermally‐Oxidized Hydroxyl‐Terminated Polybutadiene (HTPB): An Assessment of Thermal Stability

Thermal Degradation Behavior of Thermally‐Oxidized Hydroxyl‐Terminated Polybutadiene (HTPB): An Assessment of Thermal Stability

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