Phase separation, antiplasticization and moisture sorption in ternary systems containing polysaccharides and polyols

Sman, R.G.M. van der

doi:10.1016/j.foodhyd.2018.07.051

Cited by 19 publications

(6 citation statements)

References 83 publications

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“…Similar structures have been put forward by Van der Sman [117] for mixtures of polysaccharide and polyols where it was shown that phase separation could take place with the addition of water when the conditions for antiplasticization/plasticization threshold are reached.…”

Section: Sorption/desorption and Stability Aspectssupporting

confidence: 63%

“…From an analysis of data on the antiplasticization effects of water on mixtures of starch and polyols Van der Sman [117] has shown that phase separation can take place at a specific composition ratio even in the glassy state for polyol concentration above the antiplasticization/plasticization threshold condition. This observation extends the sequence of events and change of physical state taking place with increase plasticizer content in the following order: antiplasticization (molecular-scale homogeneity) → plasticization (nanoscale domain heterogeneity) → phase separation (micron-scale domain growth).…”

Section: Polymer Blendsmentioning

confidence: 99%

“…Transition antiplasticization to plasticization through the formation of plasticizer clusters. [33,55,57,117,144,145] Relaxation spectra: Reduction in glass transition temperature with a depression of β relaxations peak through an increase in relaxation time, resulting in a reduction of the glass formation fragility. [10,36,[73][74][75][76][77][78][79]84,141] Mechanical properties…”

Section: Main Features and Comments Referencesmentioning

confidence: 99%

“…Sorption and Release: Reduction of water absorption of carbohydrates in presence of plasticizers exerting strong interactions with the polymer chains. [17,32,55,57,99,[110][111][112]116,117,144] Related aspects…”

Section: Main Features and Comments Referencesmentioning

confidence: 99%

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Antiplasticization of Polymer Materials: Structural Aspects and Effects on Mechanical and Diffusion-Controlled Properties

et al. 2020

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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 and the conditions leading to the cross-over from antiplasticization to plasticization. This was based on molecular dynamics considerations of thermal transitions and related relaxation spectra, alongside the deviation of free volumes from the additivity rule. Useful insights were gained from an analysis of data on molecular glasses, including the implications of the glass fragility concept. The effects of molecular packing resulting from antiplasticization are also discussed in the context of physical ageing. These include considerations on the effects on mechanical properties and diffusion-controlled behaviour. Some peculiar features of antiplasticization regarding changes in Tg were probed and the effects of water were examined, both as a single component and in combination with other plasticizers to illustrate the role of intermolecular forces. The analysis has also brought to light the shortcomings of existing theories for disregarding the dual cross-over from antiplasticization to plasticization with respect to modulus variation with temperature and for not addressing failure related properties, such as yielding, crazing and fracture toughness.

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Section: Sorption/desorption and Stability Aspectssupporting

confidence: 63%

Section: Polymer Blendsmentioning

confidence: 99%

Section: Main Features and Comments Referencesmentioning

confidence: 99%

Section: Main Features and Comments Referencesmentioning

confidence: 99%

See 2 more Smart Citations

Antiplasticization of Polymer Materials: Structural Aspects and Effects on Mechanical and Diffusion-Controlled Properties

et al. 2020

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“… 45 This blend was plasticized by glycerol and water, showing high anti-plasticization (0 < k GM < 1) through strong H-bonding between the plasticizer and macromolecules. Previous works have only presented explicit thermodynamic solutions for multicomponent systems of polysaccharides, polyols, and water 8 , 15 by working with Flory Huggins’s free volume theory and extending the Couchman–Karasz expression for Tg .…”

Section: Resultsmentioning

confidence: 99%

The Glass Transition Temperature of Heterogeneous Biopolymer Systems

et al. 2023

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Biopolymers are abundant, renewable, and biodegradable resources. However, bio-based materials often require toughening additives, like (co)polymers or small plasticizing molecules. Plasticization is monitored via the glass transition temperature versus diluent content. To describe this, several thermodynamic models exist; nevertheless, most expressions are phenomenological and lead to over-parametrization. They also fail to describe the influence of sample history and the degree of miscibility via structure−property relationships. We propose a new model to deal with semi-compatible systems: the generalized mean model, which can classify diluent segregation or partitioning. When the constant k GM is below unity, the addition of plasticizers has hardly any effect, and in some cases, even anti-plasticization is observed. On the other hand, when the k GM is above unity, the system is highly plasticized even for a small addition of the plasticizer compound, which indicates that the plasticizer locally has a higher concentration. To showcase the model, we studied Na-alginate films with increasing sizes of sugar alcohols. Our k GM analysis showed that blends have properties that depend on specific polymer interactions and morphological size effects. Finally, we also modeled other plasticized (bio)polymer systems from the literature, concluding that they all tend to have a heterogeneous nature.

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Edible Films Based on Tapioca Starch and WPC or Gelatine Plasticized with Glycerol: Potential Food Applications Based on Their Mechanical and Heat-Sealing Properties

Izzi

Gerschenson

Jagus

et al. 2023

Food Bioprocess Technol

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Phase separation, antiplasticization and moisture sorption in ternary systems containing polysaccharides and polyols

Cited by 19 publications

References 83 publications

Antiplasticization of Polymer Materials: Structural Aspects and Effects on Mechanical and Diffusion-Controlled Properties

Antiplasticization of Polymer Materials: Structural Aspects and Effects on Mechanical and Diffusion-Controlled Properties

The Glass Transition Temperature of Heterogeneous Biopolymer Systems

Edible Films Based on Tapioca Starch and WPC or Gelatine Plasticized with Glycerol: Potential Food Applications Based on Their Mechanical and Heat-Sealing Properties

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