Storage modulus characterizes plasticization efficiency
Effect of the chain length of geraniol esters on the plasticization efficiency …
After the glass transition, at approximately 80 C, the storage modulus increases up to values close to 50 MPa. This last increase is related to the cold crystallization process of the polymer, as an increase in …
Plasticizers
This proportion is similar all over the world, and then, most of the information and understanding of the phenomena are based on PVC plasticization (Content 2014). The modification of the properties associated with the plasticization can be achieved in two ways. The first is to use substances that generate stable chemical bonds with the polymer.
Structural and Thermal Properties of Starch Plasticized with Glycerol/Urea Mixture …
The paper presents the results of research on the influence of used plasticizing system on the structural and thermal properties of thermoplastic starch (TPS). The thermoplastic starch granulate was obtained by extrusion of native starch in the presence of a plasticizing system using a twin-screw extruder. Glycerol and urea were …
Plasticization Efficiency and Characteristics of Monosaccharides, Disaccharides, and …
Aug 30, 2021, Mahafooj Alee and others published Plasticization Efficiency and Characteristics of ... in which Young''s modulus, tensile strength, and elongation at break were 344.99 MPa, 39.12 MPa ...
Current Status of Plasticizer Research | SpringerLink
For the plasticization efficiency testing, DOP is usually used as the reference to obtain the ratio of their amounts needed to achieve the same Shore hardness A value. With the same formulation, the higher the Shore hardness A value, the worse the plasticization performance. The plasticization temperature and time can also be used.
Thermomechanical Properties of Nontoxic Plasticizers for …
This work focuses on predicting the effect these plasticizers have on T g, Young''s modulus, shear modulus, fractional free volume, and diffusion for …
Effects of molecular design parameters on plasticizer …
Performance metrics including each plasticizer''s thermodynamic compatibility with PVC (measured by the heat of mixing Δ H), plasticization efficiency (measured by the reduction in the Young''s modulus Δ Y compared with pure PVC), and migration tendency
Polymers | Free Full-Text | Effect of Plasticization/Annealing on …
The storage (elastic) modulus G ′(ω) characterize the energy stored by the material, and the loss (viscous) modulus G ″(ω) characterize the energy dissipated by …
Polymers | Free Full-Text | Effect of Plasticization/Annealing on …
Additionally, the process of plasticization has an impact on the crystallization behavior of PLA. Various plasticizers have been found to decrease the nucleation density, increase the rate of spherulitic growth, and affect the crystallinity and crystallization rate of PLA [32,40,42,44,45].].
Plasticizers derived from cardanol: synthesis and plasticization properties for polyvinyl chloride…
Two natural plasticizers derived from cardanol (CD), cardanol acetate (CA) and epoxidized cardanol acetate (ECA), were synthesized and characterized by 1H NMR and 13C NMR. The plasticizing effects of the obtained plasticizers on semi-rigid polyvinylchloride (PVC) formulations were also investigated. Two commercial phthalate …
Effect of the chain length of geraniol esters on the plasticization efficiency …
The Shore D hardness values were also analyzed in Table 3.This parameter follows a similar trend to that observed in the elastic modulus. The addition of the plasticizers reduces the hardness of PLA from 76.6 down to values in the range 37–70, where the highest ...
Effects of molecular design parameters on plasticizer …
Performance metrics including each plasticizer''s thermodynamic compatibility with PVC (measured by the heat of mixing Δ H), plasticization efficiency …
Determination of plasticizers efficiency for nylon by molecular …
Polyamides are semicrystalline polymers useful in a wide range of applications in the plastics industry. Some applications require higher flexibility and workability of the polyamides, therefore, plasticizers are added to ease compounding and processing procedures and produce the desired product properties. The goal of this study …
1 Principles of Plasticization
1 . IMMERGUT AND MARK Principal of Pltnticization 3 Number of C atoms in alkyl residue Figure L Brittle point of η-alkyl esters of polyacrylic and polymethacrylic acid (27) A distinction should be made between solvent piasticizers and nonsolvent piasticizers.
Polymers | Free Full-Text | Antiplasticization of Polymer Materials ...
Antiplasticization of glassy polymers, arising from the addition of small amounts of plasticizer, was examined to highlight the developments that have taken place over the last few decades, aiming to fill gaps of knowledge in the large number of disjointed publications. The analysis includes the role of polymer/plasticizer molecular interactions …
Continuous crystalline graphene papers with gigapascal strength …
Continuous crystalline graphene papers with gigapascal ...
Plasticization of Polylactide after Solidification: An Effectiveness and Utilization …
Polylactide/triethyl citrate (PLA/TEC) systems were prepared in two ways by introducing TEC to solidified polymer matrix (SS) and by blending in a molten state (MS) to investigate the effectiveness of the plasticization process after solidification of polylactide. The plasticization processes, independent of the way of introducing the TEC …
Predicting Plasticization Efficiency from Three-Dimensional …
Purpose. In polymeric coatings, plasticizers are used to improve the film-forming characteristic of the polymers. In this study, a computerized method (VolSurf with GRID) was used as a novel tool for the prediction plasticization efficiency (β) of test compounds, and for determining the critical molecular properties needed for polymer plasticization. …
Closed-loop recycling of tough epoxy supramolecular thermosets …
Closed-loop recycling of tough epoxy supramolecular ...
Physical Aging, Plasticization and Their Effects on Gas …
Long-term physical aging and plasticization, two mobility-based phenomena that are counterintuitive in the context of "rigid" polymers of intrinsic microporosity (PIMs), were evaluated using pure- and mixed-gas permeation data for representative ladder and semiladder PIMs. PIMs between 1 and 4 years old retained …
Optimizing biodegradable plastics: Molecular dynamics insights into starch plasticization …
A series of MD simulations were performed using GROMACS. Energy minimization was accomplished by applying the steepest descent algorithm with a force tolerance of 10.0 kJ mol − 1 nm − 1 and a 0.01 nm of initial maximum displacement (0.01 step size), followed by a conjugate gradient approximation to achieve greater …
Structure Design, Performance Simulation and Plasticizing …
The volume modulus decreases by 36.4% and 51.4%, respectively. This is attributed to the addition of plasticizer which reduces the rigidity of pure PVC material and …
Polymers | Free Full-Text | Improvement of the Ductility of ...
This analysis allowed the obtaining of the evolution of the storage modulus (E′) and the dynamic damping factor (tan δ) concerning the temperature. 3. Results and Discussion 3.1. Chemical Characterization. ... thus showing the high plasticization efficiency of methyl trans –cinnamate.
A Strategy for Nonmigrating Highly Plasticized PVC | Scientific …
However, internal plasticization is less efficient and generally has an unsatisfactorily narrow use ... phthalate (DEHP), a commonly used plasticizer in PVC blood storage bags & medical tubing ...
Deep eutectic solvents based on urea, polyols and sugars for …
Dynamic mechanical-thermal analysis was applied to study changes in phase transitions as temperature function of viscoelastic materials. This technique is helpful for investigation of plasticization efficiency. Tan δ and storage modulus (E'') curves for TPS/DES are presented in Fig. 3.
Plasticization Efficiency and Characteristics of Monosaccharides, …
In this work, the saccharides with different structures and molecular weights were evaluated as a plasticizer for starch-based materials, in which the …
Plasticization and Polymer Morphology
The polymers produced by internal plasticization have a lower glass transition temperature (T g) and elastic modulus than those of the original polymers (Sothornvit and Krochta, 2005). In contrast, external …
Long
The glass transition temperature, T g, is a good measure of material plasticization, and it may serve as an indicator of plasticization efficiency . From this respect, plasticizing efficiency of PEG-400 was found higher than that of PEG-POSS especially at higher concentrations.
Plasticization and Polymer Morphology
Polymer molecules used to achieve internal plasticization are either copolymerized into the polymer structure or reacted with the original polymer. The polymers produced by internal plasticization have a lower glass transition temperature (T g) and elastic modulus than those of the original polymers (Sothornvit and Krochta, 2005). In …
The plasticizing effect of water on proteins ...
The function Pl(W) corresponding to the assumed plasticization mechanisms, provides more flexible quantitative estimations for polysaccharides and proteins.According to Slade and Levine (1995a), they imply the following points: (i) the glass transition temperature of any dry biopolymer is about 200±50°C; (ii) at low moisture …
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