Role of additives in starch-based edible films and coating: A
Also, higher molecular weight plasticizers like sucrose and maltose contribute to the greater thickness of the film due to more solid content that can impart more crystallization. On the other hand, lower molecular weight monosaccharides form thin films due to their property of forming a closely packed polymer chain matrix leading to thinner
Antiplasticization of Polymer Materials: Structural
The analysis includes the role of polymer/plasticizer molecular interactions and the conditions leading to the cross-over from antiplasticization to plasticization. This was based on...
Effect of Polymer Grade and Plasticizer Molecular Weights on
The effect of different plasticizer molecular weight and concentration on mechanical and thermomechanical properties of free films. Drug Dev. Ind. Pharm. (2002) 28: 713-717 Loss tangent Plasticizer m olecular weight 1000 2000 3000 4000 0.0082 0.0084 0.0086 0.0088 0.0090 0.0092 Figure 3. The effect of plasticizer (10% w/w) molecular weights on
Effect of plasticizers and polymer blends for processing
Plasticizers depress the glass transition temperature (Tg) of polymers and produce a flowable material at lower temperatures. The use of plasticizers to depress Tg of lignin is important, since at high processing temperatures lignin crosslinks, making it intractable. The goal of this study was to assess plasticizers and polymer blends for the ability to retard a commercial softwood kraft
Eects of molecular design parameters on plasticizer
plasticizer molecular design are also compiled from various literature sources and reviewed. Comparison with experiments establishes the reliability of our simulation predictions. The study aims to provide a comprehensive set of guidelines for the se-lection and design of high-performance plasticizers at the molecular level. Molecular
- Does molecular weight affect melting temperature of PLLA/peg blends?
- The effect of the molecular weight (MW) and the amount of PEG on the thermal and mechanical properties has been widely studied for the PLLA/PEG blends. Younes et al. [ 23] investigated the effect of MW and the amount of PEG on the melting temperature ( Tm) of PLLA/PEG blends.
- Which polymers are plasticized?
- The plasticizers produced have been applied in 60 polymers and more than 30 groups of products. Industrially, the most common plasticized polymers are PVC, poly (vinyl butyral) (PVB), poly (vinyl acetate) (PVAc), acrylics, cellulose molding compounds, nylon, polyamides and certain copolyamides.
- What is the molecular size of a plasticizer?
- Plasticizers are, in general, high boiling point liquids with average molecular weights of between 300 and 600, and linear or cyclic carbon chains (14–40 carbons) , . The low molecular size of a plasticizer allows it to occupy intermolecular spaces between polymer chains, reducing secondary forces among them.
- Why are plasticizers important in biopolymer-based films & coatings production?
- In biopolymer-based films and coatings production, plasticizers are also essential additives since they can improve flexibility and handling of films, maintain integrity and avoid pores and cracks in the polymeric matrix .
- Does plasticizer type affect the equilibrium moisture content of films?
- Plasticizer type did not significantly affect the equilibrium moisture content of films. Sucrose added films were the most fragile at low RH, while GLY films were the most hygroscopic. However, at RH of 76–90%, sucrose films showed similar resistance compared to other plasticized films.
- What factors affect a plasticizer's solubility?
- Other important factor is solvation, as plasticizers with solubility parameters close to those of the polymer require less energy to fuse or solvate the polymer. The temperature of fusion or gelation is related to the solvation strength of the plasticizer and to the size of its molecule .
