COMPARISON OF AMYLOPECTIN AND CORN STARCH IN COMPOSITIONS BASED ON POLYLACTIDE USED IN MEDICINE FOR PRODUCTION OF BILIARY STENTS THROUGH STUDIES OF PHYSICO-MECHANICAL PROPERTIES
Rubrics: 2. CHEMICAL TECHNOLOGY
Authors:
1.
Kazan nationa research technological university
(Technology and processing of rubbers and elastomers, graduate student)
2.
Kazan National Research Technological University
3.
Kazan National Research Technological University
(Medical engineering)
graduate student from 01.01.2021 to 01.01.2024
Kazan National Research Technological University (polymer materials processing laboratory, engineer)
graduate student from 01.01.2024 to 01.01.2024
Kazan, Kazan, Russian Federation
graduate student from 01.01.2021 to 01.01.2024
Kazan National Research Technological University (polymer materials processing laboratory, engineer)
graduate student from 01.01.2024 to 01.01.2024
Kazan, Kazan, Russian Federation
4.
KNITU
5.
KNITU
6.
KNITU; Kazan National Research Technological University
7.
KNITU; KNRTU
Type:
Article
Pages:
from 37
to 41
Status:
Published
Received:
27.01.2026
Accepted:
28.01.2026
Published:
28.01.2026
Language:
Russian
Keywords:
BIODEGRADABILITY, COMPOSITIONS, THERMOPLASTIC STARCH, BILIARY STENT, MEDICINE, POLYLACTIDE
Abstract:
Under conditions of high-temperature shear deformations, mixtures based on polylactide with corn and amylopectin thermoplastic starch were obtained in the Brabender laboratory mixer. The molding process was performed by the method of flat-plate extrusion, followed by cutting blades from the obtained tapes on a press machine. The samples were tested for physical and mechanical parameters and the results were compared. The determination of the optimal mixing time was carried out on a corn starch. It was found out that compositions with a ratio of TPC/PLA 100/100 mass parts with different mixing times (5, 10 and 15 minutes), the values of physical and mechanical parameters such as torque, tensile strength, hardness and density practically do not change. The elongation and fluidity values of the melt samples decrease with increasing mixing time. Comparative physicomechanical tests of two different types of starches have shown that compositions based on amylopectin starch have higher characteristics than for compositions based on corn starch. Thus, a value of 5 minutes was chosen as the optimal mixing time. For further research, a composition with a ratio of TPC (amylopectin) was selected - PLA 1:2, since the samples made from this composition showed the best values according to the results of physical and mechanical tests, including the tensile strength was 27.8 MPa, the conditional yield strength was 24.2 MPa. It was found that with accelerated degradation, the main physical and mechanical indicators of the compositions decreased by more than 2 times, while the decrease for mixtures based on corn starch was more significant.
Under conditions of high-temperature shear deformations, mixtures based on polylactide with corn and amylopectin thermoplastic starch were obtained in the Brabender laboratory mixer. The molding process was performed by the method of flat-plate extrusion, followed by cutting blades from the obtained tapes on a press machine. The samples were tested for physical and mechanical parameters and the results were compared. The determination of the optimal mixing time was carried out on a corn starch. It was found out that compositions with a ratio of TPC/PLA 100/100 mass parts with different mixing times (5, 10 and 15 minutes), the values of physical and mechanical parameters such as torque, tensile strength, hardness and density practically do not change. The elongation and fluidity values of the melt samples decrease with increasing mixing time. Comparative physicomechanical tests of two different types of starches have shown that compositions based on amylopectin starch have higher characteristics than for compositions based on corn starch. Thus, a value of 5 minutes was chosen as the optimal mixing time. For further research, a composition with a ratio of TPC (amylopectin) was selected - PLA 1:2, since the samples made from this composition showed the best values according to the results of physical and mechanical tests, including the tensile strength was 27.8 MPa, the conditional yield strength was 24.2 MPa. It was found that with accelerated degradation, the main physical and mechanical indicators of the compositions decreased by more than 2 times, while the decrease for mixtures based on corn starch was more significant.
Keywords:
BIODEGRADABILITY, COMPOSITIONS, THERMOPLASTIC STARCH, BILIARY STENT, MEDICINE, POLYLACTIDE
BIODEGRADABILITY, COMPOSITIONS, THERMOPLASTIC STARCH, BILIARY STENT, MEDICINE, POLYLACTIDE
