Impact of acid hydrolysis on morphology, rheology, mechanical properties, and processing of thermoplastic starch
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389013%3A_____%2F25%3A00619647" target="_blank" >RIV/61389013:_____/25:00619647 - isvavai.cz</a>
Alternative codes found
RIV/00216208:11310/25:10498686 RIV/00216208:11320/25:10498686
Result on the web
<a href="https://www.mdpi.com/2073-4360/17/10/1310" target="_blank" >https://www.mdpi.com/2073-4360/17/10/1310</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.3390/polym17101310" target="_blank" >10.3390/polym17101310</a>
Alternative languages
Result language
angličtina
Original language name
Impact of acid hydrolysis on morphology, rheology, mechanical properties, and processing of thermoplastic starch
Original language description
We modified native wheat starch using 15, 30, and 60 min of acid hydrolysis (AH). The non-modified and AH-modified starches were converted to highly homogeneous thermoplastic starches (TPSs) using our two-step preparation protocol consisting of solution casting and melt mixing. Our main objective was to verify if AH can decrease the processing temperature of TPS. All samples were characterized in detail by microscopic, spectroscopic, diffraction, thermomechanical, rheological, and micromechanical methods, including in situ measurements of torque and temperature during the final melt mixing step. The experimental results showed that (i) AH decreased the average molecular weight preferentially in the amorphous regions, (ii) the lower-viscosity matrix in the AH-treated starches resulted in slightly higher crystallinity, and (iii) all AH-modified TPSs with a less viscous amorphous phase and higher content of crystalline phase exhibited similar properties. The effect of the higher crystallinity predominated at a laboratory temperature and low deformations, resulting in slightly stiffer material. The effect of the lower viscosity dominated during the melt mixing, where the shorter molecules acted as a lubricant and decreased the in situ measured processing temperature. The AH-induced decrease in the processing temperature could be beneficial for energy savings and/or possible temperature-sensitive admixtures for TPS systems.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10404 - Polymer science
Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Polymers
ISSN
2073-4360
e-ISSN
2073-4360
Volume of the periodical
17
Issue of the periodical within the volume
10
Country of publishing house
CH - SWITZERLAND
Number of pages
21
Pages from-to
1310
UT code for WoS article
001495670100001
EID of the result in the Scopus database
2-s2.0-105006853895