Hydrolysis of biobased stereocomplex polylactide: Polymorphism dependent crystals degradation and evolution of three-phase crystalline composition
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Hydrolysis of biobased stereocomplex polylactide : Polymorphism dependent crystals degradation and evolution of three-phase crystalline composition. / Chen, Qi; Sogut, Ece; Auras, Rafael; Kirkensgaard, Jacob Judas Kain; Uysal-Unalan, Ilke.
In: Applied Materials Today, Vol. 38, 102226, 2024.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - Hydrolysis of biobased stereocomplex polylactide
T2 - Polymorphism dependent crystals degradation and evolution of three-phase crystalline composition
AU - Chen, Qi
AU - Sogut, Ece
AU - Auras, Rafael
AU - Kirkensgaard, Jacob Judas Kain
AU - Uysal-Unalan, Ilke
N1 - Publisher Copyright: © 2024 The Author(s)
PY - 2024
Y1 - 2024
N2 - The hydrolytic degradation behavior of stereocomplex polylactide (SCPLA) with distinct polymorphisms (α, αʹ, SC) and SC fractions (the ratio of SC crystallinity to total crystallinity) was first investigated in the present study. The evolution of three-phase crystalline compositions was quantified using modulated differential scanning calorimetry. Hydrolytic degradation commenced in the mobile amorphous fraction (MAF), while both the crystal (CF) and rigid amorphous fraction (RAF) began degradation on Day 3. By the 26th day, the MAF was consumed entirely, followed by the CF and RAF degraded at similar rates, primarily through the cleavage of chains with free ends on the folding surface of the remaining lamella. This work further discussed the influence of polymorphism on homochiral (HC) and SC crystal degradation during hydrolysis. Given racemic helices' participation in SC crystallization, SC-crystal lamellae may possess a higher number of amorphous chains with free ends than HC-crystals. This attribute could account for the faster degradation of HC-crystals in samples with a higher SC fraction.
AB - The hydrolytic degradation behavior of stereocomplex polylactide (SCPLA) with distinct polymorphisms (α, αʹ, SC) and SC fractions (the ratio of SC crystallinity to total crystallinity) was first investigated in the present study. The evolution of three-phase crystalline compositions was quantified using modulated differential scanning calorimetry. Hydrolytic degradation commenced in the mobile amorphous fraction (MAF), while both the crystal (CF) and rigid amorphous fraction (RAF) began degradation on Day 3. By the 26th day, the MAF was consumed entirely, followed by the CF and RAF degraded at similar rates, primarily through the cleavage of chains with free ends on the folding surface of the remaining lamella. This work further discussed the influence of polymorphism on homochiral (HC) and SC crystal degradation during hydrolysis. Given racemic helices' participation in SC crystallization, SC-crystal lamellae may possess a higher number of amorphous chains with free ends than HC-crystals. This attribute could account for the faster degradation of HC-crystals in samples with a higher SC fraction.
KW - Biodegradable
KW - Bioplastic
KW - Lactide
KW - Rigid amorphous fraction
KW - Structure-property relationship
U2 - 10.1016/j.apmt.2024.102226
DO - 10.1016/j.apmt.2024.102226
M3 - Journal article
AN - SCOPUS:85192290453
VL - 38
JO - Applied Materials Today
JF - Applied Materials Today
SN - 2352-9407
M1 - 102226
ER -
ID: 392973386