Controlling the size of spherulite and the degradation of poly(butylene succinate-co-adipate) by solvent and gel preparation temperature
Autor: | Tomoki Maeda, Atsushi Hotta, Saya Kamitabira, Hana Yamazaki |
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Rok vydání: | 2019 |
Předmět: |
Polymers and Plastics
Chemistry Cyclohexanone 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Toluene 0104 chemical sciences Polybutylene succinate Solvent chemistry.chemical_compound Spherulite Chemical engineering Mechanics of Materials Adipate Materials Chemistry Gel preparation Degradation (geology) 0210 nano-technology |
Zdroj: | Polymer Degradation and Stability. 162:106-111 |
ISSN: | 0141-3910 |
Popis: | The size of spherulites observed in the poly(butylene succinate-co-adipate) (PBSA) gel was found to be effectively controlled by the careful selection of the types of solvent and the gel preparation temperature. Additionally, the degradation behavior of the PBSA dried-gels with different sizes of spherulites was studied. By using different solvents, such as toluene (TOL), o-dichlorobenzene (o-DCB), and cyclohexanone (CHN), the diameter of the spherulites could be changed from 16.7 μm to 186.2 μm, while the gel preparation temperature was kept constant at 28 °C. The gel preparation temperature was then changed from −50 °C to 28 °C using CHN, and it was found that the diameter of the spherulites changed from 25.2 μm to 186.2 μm. Regarding the degradation behavior, the PBSA dried-gel with relatively smaller spherulites (∼20 μm in diameter) exhibited higher weight loss of over 80% at the immersion time of 6 days, while the PBSA dried-gels with relatively larger spherulites (∼186 μm in diameter) presented lower weight loss of below 30% at the immersion time of 6 days. It was therefore concluded that the degradation rate became lower with the increase in the size of spherulites. |
Databáze: | OpenAIRE |
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