TY - JOUR
T1 - Controlling the size of spherulite and the degradation of poly(butylene succinate-co-adipate) by solvent and gel preparation temperature
AU - Yamazaki, Hana
AU - Kamitabira, Saya
AU - Maeda, Tomoki
AU - Hotta, Atsushi
N1 - Funding Information:
This work was supported in part by a Grant-in-aid for Science Research (A), by a Fund for the Promotion of Joint International Research (Fostering Joint International Research) (No. 15H02298 and No. 15KK0244 , respectively to A.H., from Japan Society for the Promotion of Science (JSPS: “KAKENHI”)). A.H. is grateful to Prof Glenn H. Fredrickson from the University of California, Santa Barbara for offering stimulating suggestions and encouragements.
Publisher Copyright:
© 2019 Elsevier Ltd
PY - 2019/4
Y1 - 2019/4
N2 - 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.
AB - 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.
KW - Degradation
KW - Gel
KW - Poly(butylene succinate-co-adipate)
KW - Spherulite
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U2 - 10.1016/j.polymdegradstab.2019.02.014
DO - 10.1016/j.polymdegradstab.2019.02.014
M3 - Article
AN - SCOPUS:85061824101
VL - 162
SP - 106
EP - 111
JO - Polymer Degradation and Stability
JF - Polymer Degradation and Stability
SN - 0141-3910
ER -