Disclosing the complex crystallization of PBAT/PLA/Babassu biocompounds through MDSC analysis

Biocompounds based on poly(butylene adipate‐co‐terephthalate) (PBAT) and polylactic acid (PLA) were produced at 50:50 with 1% and 5% of Babassu. Modulated differential scanning calorimetry was employed to elucidate their complex melt and cold crystallizations and recrystallization. Heat flow signals...

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Bibliographic Details
Published in:Journal of thermal analysis and calorimetry 2022-07, Vol.147 (13), p.7299-7310
Main Authors: Wellen, Renate M. R., Jaques, Nichollas G., Barros, Ana B. S., Morais, Dayanne D. S., Almeida, Débora E. O., Araújo, Edcleide M., Haag, Katharina, Carvalho, Laura H., Koschek, Katharina
Format: Article
Language:English
Subjects:
Analysis
Analytical Chemistry
Biopolymers
Butylene
Calorimetry
Chemistry
Chemistry and Materials Science
Cooling rate
Crystallization
Dynamic mechanical analysis
Energy dissipation
Heat transfer
Heat transmission
Heating
Inorganic Chemistry
Measurement Science and Instrumentation
Physical Chemistry
Polylactic acid
Polymer Sciences
Recrystallization
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Summary:Biocompounds based on poly(butylene adipate‐co‐terephthalate) (PBAT) and polylactic acid (PLA) were produced at 50:50 with 1% and 5% of Babassu. Modulated differential scanning calorimetry was employed to elucidate their complex melt and cold crystallizations and recrystallization. Heat flow signals under applied amplitudes/frequencies did not significantly change; hence, 1 K/60 s was selected to perform the crystallization tests. From the non-reversing heat flow signal, higher cooling/heating rates led to higher crystallization rates, and under higher heating rates much PLA’s polymorphic crystalline phase is produced. PLA’s recrystallization which occurs within its melting increased with Babassu addition. Dynamic mechanical analysis and scanning electron microscopy indicated absence of Babassu aggregates resulted from the proper processing, adding PBAT to PLA improved the energy dissipation mechanisms as translated through higher stress support; related to Babassu adding 1% to PBAT/PLA the stress was improved and it acted as toughening agent . PBAT/PLA/Babassu besides environmentally safe are industrially advantageous once provide options for application such as food packing and general products.
ISSN:1388-6150
1588-2926
DOI:10.1007/s10973-021-11058-w