Comparative Effect of Different Plasticizers on Barrier, Mechanical
Purpose Identifying ideal plasticizer is pivotal to develop a biopolymer-based edible films for food packaging. The effect of different plasticizers (glycerol, polyethylene glycol, sorbitol) on the mechanical, water vapor barrier, optical, and moisture sorption properties of hydroxypropyl methylcellulose (HPMC) -based flexible films was examined in this study. Methods Mechanical properties and
Effect of plasticizers on the mechanical and thermomechanical
Effect of the single-component plasticizers on the tensile properties of CF-HEC composite. Many packaging materials require high elongation at break in addition to good strength properties. However, many natural-based polymers have low ductility due to the strong hydrogen bonding between constituent molecules, which results in a stiff structure.
Long- and short-term stability of plasticized poly(lactic acid
In addition, a new plasticizer, PEG-functionalized polyhedral oligomeric silsesquioxane (PEG-POSS), was used for comparison. The short- and long-term mechanical, thermal, and morphological properties of PLA and plasticized PLA were determined by tensile tests, differential scanning calorimetry, and scanning electron microscopy (SEM), respectively.
The influence of different plasticizers and polymers on the mechanical
Thermal analyses were performed using differential scanning calorimetry (DSC). The results showed that the addition of plasticizer caused a decrease in both elastic modulus and glass transition temperature (T(g)) and an increase in elongation at break of free shellac films. This effect was related to the concentrations of plasticizers.
Effects of Plasticizers on Mechanical Properties, Oxygen
Tensile strength and elastic modulus of films were decreased when adding plasticizers, whereas elongation at break were increased. Therefore, it caused an increase in oxygen permeability of...
- How do Plasticizers improve mechanical properties?
- Plasticizers by reducing the intermolecular forces soften the rigidity of the film structure and increase the mobility of the biopolymeric chains, thus improving the mechanical properties.
- Do plasticizers soften thermomechanical properties?
- The effect of the different single-component plasticizers (glycerol, propylene carbonate and ethylene carbonate) on the mechanical and dynamic thermomechanical properties of the films were studied. Moreover, the softening effect of the two-component plasticizer based on deep eutectic solvents (DESs) was addressed.
- How do plasticizers affect physical properties of polymers?
- Additionally, the incorporation of plasticizers into the polymer can affect some physical properties of the polymer such as the viscosity, degree of crystallinity, glass transition temperature (T g), hardness, and density [15, 35]. 4.1. Plasticization Mechanisms The plasticization mechanism can be explained by several theories.
- Does humidity affect the performance of plasticizers?
- Based on the dynamic mechanical analysis at varying humidity, the performance of plasticizers was strongly attributed to the humidity. The DES based on tetrabutylammonium bromide and propylene carbonate was most efficient at providing thermoformability to the composite by lowering the thermal softening temperature.
- Does G-plasticized film have higher thermal stability than control films?
- The G-plasticized films showed higher thermal stability than control films. The cross-sectional micrographs revealed that the films containing 45% glycerol concentration had higher homogeneity than 15% and 30%. Water vapour permeability of plasticized films increased by an increase in glycerol concentrations.
- What are the benefits of plasticizers?
- In addition, the softening effect of plasticizers can improve the flow properties of the blend, with reduced viscosity and better dispersion of fillers in the matrix .
