A practical guide to polymer miscibility

Coleman, Michael M.; Serman, Carl J.; Bhagwagar, Dorab E.; Painter, Paul C.

doi:10.1016/0032-3861(90)90208-g

Cited by 271 publications

(134 citation statements)

References 46 publications

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“…From a theoretical point of view, often the solubility parameters are used to calculate miscibility for a first insight. Using incremental parameters resting upon datasets for molecular groups developed by several authors [50][51][52][53] as listed in the book of Robeson 48 , a difference in the solubility parameters of around 0.3-0.4 up to 0.8-0.9 J 0.5 cm -1.5 can be calculated assuming non-polar interactions (see Table 1). For a blend of polyesters, dipol-dipol interactions can be assumed and a solubility parameter difference of up to 0.5 J 0.5 cm -1.5 should allow miscibility.…”

Section: Miscibilitymentioning

confidence: 99%

“…For a blend of polyesters, dipol-dipol interactions can be assumed and a solubility parameter difference of up to 0.5 J 0.5 cm -1.5 should allow miscibility. 52 Therefore, using only the data of van Krevelen, 50 miscibility should be given and, using the data of Hoy 53 immiscibility is stated. As a consequence, the mean of the data of van Krevelen, 50 Small, 51 Coleman 52 and Hoy 53 as given in Table 1 In Figures 1a and b, the free Gibbs energy according to Flory-Huggins -using a solubility parameter difference of 0.65 J 0.5 cm -1.5 -is shown for several combinations of molecular weights of PLA and PHBV, as an example.…”

Section: Miscibilitymentioning

confidence: 99%

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Blending of Polyhydroxybutyrate-co-valerate with Polylactic Acid for Packaging Applications – Reflections on Miscibility and Effects on the Mechanical and Barrier Properties

Jost¹

2015

Chem.Biochem.Eng.Q.

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Biopolymers for packaging applications offer many advantages and are therefore of increasing interest. In order to develop a sustainable alternative for petrochemical-based polymers the biobased and biodegradable polymers, the focus of this work are polyhydroxybutyrate-co-valerate (PHBV) and polylactic acid (PLA) (and copolymers). Blending of these two biopolymers was reviewed under thermodynamic aspects and backed with own results. Additionally, different ways of improving the miscibility were performed by compatibilisers, peroxides, transesterification catalysts, and by blending PHBV with modified molecular weight. These blends were extruded as cast films, and characterised by means of mechanical and barrier properties. This study analyses the miscibility of PLA and PHB-copolyester (with approximately equal molar masses) and reports on the unusually high barrier properties in PLA and PHBV blends. However, the quality of blending, especially regarding barrier properties to interphase boundaries, depends on the compatibility of the components and the morphology of the blend. Our results suggest that a PHBV content of 20-35 % in PLA is the most suitable blend system in terms of compatibility and high barrier properties.

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Section: Miscibilitymentioning

confidence: 99%

Section: Miscibilitymentioning

confidence: 99%

Blending of Polyhydroxybutyrate-co-valerate with Polylactic Acid for Packaging Applications – Reflections on Miscibility and Effects on the Mechanical and Barrier Properties

Jost¹

2015

Chem.Biochem.Eng.Q.

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“…[32][33][34][35][36][37][38][39][40][41]43 Typically, two criteria for miscibility are utilized when using the Flory-Huggins approach: 1) for a miscible composition, the interaction parameter χ has to be lower than some critical value cr χ (see Supporting Information for the details) and 2) the solubility parameters ( δ ) have to be close enough to each other. According to Coleman et al 44 , for weakly interacting polymers such as PLA and PHB this difference should not exceed 2 (J/cm 3 ) 0. 5 .…”

Section: Figurementioning

confidence: 99%

Scale-Dependent Miscibility of Polylactide and Polyhydroxybutyrate: Molecular Dynamics Simulations

et al. 2017

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Miscibility of polylactide (PLA) and polyhydroxybutyrate (PHB) is studied by the microsecond atomistic molecular-dynamics (MD) simulations for the first time. The model and the simulation protocol were confirmed through comparison of the glass transition temperature (T g ) with experimental data. It was established that PLA and PHB are miscible on the basis of the 2 Flory-Huggins theory. Analysis of the mobilities of PLA and PHB subchains revealed that the blends have two transitions to a glassy state at the length scale of a few Kuhn segments, which is in line with the predictions of the self-concentration model. At the same time at the larger length scale, a single transition to a glassy state was observed suggesting scale-dependence of PLA and PHB miscibility. This scale-dependence was confirmed through the evaluation of the interchain pair correlation functions.

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“…In the PLA/STVPh blends, immiscibility was observed with the styrene rich copolymers and with pure Poly(styrene) (PS), (Zuza et al, 2008). The latter result was indeed expected considering the difference of solubility parameters (δ = 9.5 and 10.1 (cal/cm 3 ) 1/2 for PS and PLA respectively ;Coleman M.M. et al, 1990), and considering also the lack of specific interactions in the PLA/PS system.…”

Section: Introductionmentioning

confidence: 62%

Analysis of the Miscibility of Polymer Blends Through Molecular Dynamics Simulations

Arenaza¹,

Meaurio²,

Sarasua³

2012

Polymerization

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A practical guide to polymer miscibility

Cited by 271 publications

References 46 publications

Blending of Polyhydroxybutyrate-co-valerate with Polylactic Acid for Packaging Applications – Reflections on Miscibility and Effects on the Mechanical and Barrier Properties

Blending of Polyhydroxybutyrate-co-valerate with Polylactic Acid for Packaging Applications – Reflections on Miscibility and Effects on the Mechanical and Barrier Properties

Scale-Dependent Miscibility of Polylactide and Polyhydroxybutyrate: Molecular Dynamics Simulations

Analysis of the Miscibility of Polymer Blends Through Molecular Dynamics Simulations

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