Combination of in vitro thermally-accelerated ageing and Fourier-Transform Infrared spectroscopy to predict scaffold lifetime

Langueh, Credson; Changotade, Sylvie; Ramtani, S.; Lutomski, Didier; Rohman, Géraldine

doi:10.1016/j.polymdegradstab.2020.109454

Cited by 4 publications

(3 citation statements)

References 36 publications

(45 reference statements)

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“…These peaks decreased gradually when the PBAT/PLA blends were under hydrolyzation. Rohman also found the diminished peak at 1164 cm –1 of ester groups in poly(ester-urethane-urea), and the intensity of this peak decreased 47.7% after incubated at 75 °C for 89 days . Simultaneously, the peak at 1691 cm –1 appeared after incubation, assigned to the −C=O groups of carboxylic acid (Figure B).…”

Section: Characterization For Chain Scission/cross-linking In Acceler...mentioning

confidence: 99%

“…Rohman also found the diminished peak at 1164 cm −1 of ester groups in poly(ester- urethane-urea), and the intensity of this peak decreased 47.7% after incubated at 75 °C for 89 days. 120 Simultaneously, the peak at 1691 cm −1 appeared after incubation, assigned to the −C=O groups of carboxylic acid (Figure 13B). With the promoted temperature for treatment, the aging was aggravated obviously.…”

Section: Infrared Spectroscopy To Detect Functional Groups For Aged P...mentioning

confidence: 99%

Section: Characterization For Chain Scission/cross-linking In Acceler...mentioning

confidence: 99%

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Characterization Techniques of Polymer Aging: From Beginning to End

Tian

Lin

et al. 2023

Chem. Rev.

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Polymers have been widely applied in various fields in the daily routines and the manufacturing. Despite the awareness of the aggressive and inevitable aging for the polymers, it still remains a challenge to choose an appropriate characterization strategy for evaluating the aging behaviors. The difficulties lie in the fact that the polymer features from the different aging stages require different characterization methods. In this review, we present an overview of the characterization strategies preferable for the initial, accelerated, and late stages during polymer aging. The optimum strategies have been discussed to characterize the generation of radicals, variation of functional groups, substantial chain scission, formation of low-molecular products, and deterioration in the polymers' macro-performances. In view of the advantages and the limitations of these characterization techniques, their utilization in a strategic approach is considered. In addition, we highlight the structure−property relationship for the aged polymers and provide available guidance for lifetime prediction. This review could allow the readers to be knowledgeable of the features for the polymers in the different aging stages and provide access to choose the optimum characterization techniques. We believe that this review will attract the communities dedicated to materials science and chemistry.

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Section: Characterization For Chain Scission/cross-linking In Acceler...mentioning

confidence: 99%

Section: Infrared Spectroscopy To Detect Functional Groups For Aged P...mentioning

confidence: 99%

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Characterization Techniques of Polymer Aging: From Beginning to End

Tian

Lin

et al. 2023

Chem. Rev.

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Aging properties of a vegetable‐based polyurethane foam under high relative humidity and different temperatures

Da Silva,

De Barros,

Casari

et al. 2024

Polymer Engineering & Sci

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The objective of this study is to assess, characterize, and forecast the aging effects on the mechanical properties of a vegetable‐based polyurethane foam (PUF) derived from castor oil under elevated relative humidity conditions and at two distinct load orientations (aligned with the expansion direction and perpendicular to it). Ten specimens were subjected to temperatures of 60, 75, and 90°C, along with a relative humidity of 90%, for a duration of up to 60 days. Compression tests, following ASTM D1621‐16 standards and supplemented by 3D digital image correlation, revealed nearly isotropic behavior with marginally lower compression strength in the expansion direction. On the other hand, the strength of the foams at 90°C was higher in that direction. This led to a smaller activation energy (Ea) in this property, which ended up showing a shorter lifespan prediction considering the strength retention in this direction. The stiffness values were proportionally more similar in both directions than the strength ones and this was observed in the Ea for those curves. In contrast to several other foams and polyurethanes, the one examined in this study exhibited consistently higher Ea values for its mechanical properties, particularly in the transverse direction to expansion, surpassing 94 kJ/mol. This indicates a robust diffusion and chemical stability, suggesting its potential for prolonged utilization compared to conventional oil‐based foams. A prediction was made that this foam would lose 50% of its stiffness and strength in around 9.8 and 9.5 years at 20°C, respectively, considering the directions more sensitive to the aging process. This research offers valuable insights for predicting lifespan based on operating temperatures and property retention needs, contributing to the advancement of sustainable materials in structural applications.Highlights Fifty specimens investigated for each of two directions. Evaluation of vegetable‐based PUF aging process unveils density changes. Unique behavior noted: different Ea values for each direction. High Ea values indicate enhanced mechanical stability over oil‐based foams. Lifespan prediction enhances material application prospects.

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Program and Abstracts

2023

Tissue Engineering Part A

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Combination of in vitro thermally-accelerated ageing and Fourier-Transform Infrared spectroscopy to predict scaffold lifetime

Cited by 4 publications

References 36 publications

Characterization Techniques of Polymer Aging: From Beginning to End

Characterization Techniques of Polymer Aging: From Beginning to End

Aging properties of a vegetable‐based polyurethane foam under high relative humidity and different temperatures

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