Evaluation of interactions in blends of ethylene-vinyl acetate copolymers with poly(vinyl chloride) using model compounds

Cruz‐Ramos, C. A.; Paul, Donald R

doi:10.1021/ma00193a049

Cited by 49 publications

(19 citation statements)

References 22 publications

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“…The exothermic heat of mixing 3 with a premix of 1 and 2, was due to the decrease in the number of the strongly repulsive 1-2 contacts, relative to 1-3 and 2-3 contacts. A similar study was also performed by Cruz-Ramos and Paul (1989).…”

Section: Introductionmentioning

confidence: 74%

Vapor-liquid equilibria for copolymer/solvent systems: Effect of “intramolecular repulsion”

Gupta¹,

Prausnitz²

1996

Fluid Phase Equilibria

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The role of intramolecular interactions in blend miscibility is well documented for polymer+copolymer mixtures (ten Brinke et al., 1983;Paul and Barlow, 1984). Some copolymer+polymer mixtures are miscible although their corresponding homopolymers are not miscible; for example, over a range of acrylonitrile content, styrene/acrylonitrile copolymers are miscible with poly(methy1 methacrylate) but neither polystyrene nor polyacrylonitrile is miscible with poly(methy1 methacrylate). Similarly, over a composition range, butadiendacrylonitrile copolymers are miscible with poly(viny1 chloride) while none of the binary combinations of the homopolymers [polybutadiene, polyacrylonitrile, and poly(viny1 chloride)] are miscible. This behavior has been attributed to "intramolecular repulsion" between unlike copolymer segments.We have observed similar behavior in vapor-liquid equilibria (VLE) of copolymer+solvent systems. We find that acrylonitrile/butadiene copolymers have higher affmity for acetonitrile solvent than do polyacrylonitrile or polybutadiene. We attribute this non-intuitive behavior to "intramolecular repulsion" between unlike segments of the copolymer. This repulsive interaction is weakened when acetonitrile molecules are in the vicinity of unlike copolymer segments, favoring copolymer+solvent miscibility. We find similar behavior when acetonitrile is replaced by methyl ethyl ketone. To our best knowledge, this effect has not been reported previously for VLE. We have obtained VLE data for mixtures containing a solvent and a copolymer as a function of copolymer composition. It appears that, at a given solvent partial pressure, there may be copolymer composition that yields maximum absorption of the solvent. This highly non-ideal VLE phase behavior may be useful for optimum design of a membrane for a separation process.

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Section: Introductionmentioning

confidence: 74%

Vapor-liquid equilibria for copolymer/solvent systems: Effect of “intramolecular repulsion”

Gupta¹,

Prausnitz²

1996

Fluid Phase Equilibria

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“…polar molecules per unit of the monomer increases, like in the compositions 50/15/35 and 50/35/15, and the value of a 23 has increased from À5.39 to À6.03 and À4.28 to À5.91 respectively which is about 12% and 38% respectively and this improvement is upon irradiation. It is known that EVA with 45-87% VA content [31] produces miscible blends with PVC and hence it is possible to increase the number of polar groups with higher VA content and microwave irradiation will improve interaction very efficiently to make this interface still stronger. This is a clear demonstration that interfaces are improved and hence the blend becomes stronger.…”

Section: Pls Resultsmentioning

confidence: 99%

Microwave irradiation induced modifications on the interfaces in SAN/EVA/PVC and PVAc/BPA/PVP ternary polymer blends: Positron lifetime study

Dinesh

Ranganathaiah

2013

Nuclear Instruments and Methods in Physics Research Section B:

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“…An important consequence of Eqs. [1] and [2] is that the solid-liquid work of adhesion may be expressed, in the absence of spreading pressure (which is generally the case for polymeric substrates), by the YoungDupré equation…”

Section: Theoreticalmentioning

confidence: 99%

“…Indeed, EVA can form miscible blends with PVC, whereas neither polyethylene nor polyvinylacetate homopolymers do so (1,2). The miscibility windows of PVC ϩ EVA polymer blends have been the subject of extensive studies; particularly, vinyl acetate content in EVA, EVA content in the blend, and the temperature have been reported to influence polymer miscibility (1,(3)(4)(5)(6)(7). Additionally, PVC ϩ EVA blends are of practical importance, as certain EVA copolymers are used as plasticizers in PVC (at certain vinyl acetate contents), e.g., for packaging purposes.…”

Section: Introductionmentioning

confidence: 99%

On the Surface Free Energy of PVC/EVA Polymer Blends: Comparison of Different Calculation Methods

Michalski

Hardy

Saramago³

1998

Journal of Colloid and Interface Science

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Evaluation of interactions in blends of ethylene-vinyl acetate copolymers with poly(vinyl chloride) using model compounds

Cited by 49 publications

References 22 publications

Vapor-liquid equilibria for copolymer/solvent systems: Effect of “intramolecular repulsion”

Vapor-liquid equilibria for copolymer/solvent systems: Effect of “intramolecular repulsion”

Microwave irradiation induced modifications on the interfaces in SAN/EVA/PVC and PVAc/BPA/PVP ternary polymer blends: Positron lifetime study

On the Surface Free Energy of PVC/EVA Polymer Blends: Comparison of Different Calculation Methods

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