The Effect of Crystallinity on the Vapor-Phase Sorption of Acetone in Oriented Poly(ethylene terephthalate)

Sirur, P.V.; Cates, David M.; Guion, T.H.; Walsh, W.K.

doi:10.1177/004051757304301207

Cited by 2 publications

(1 citation statement)

References 10 publications

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“…Despite the success of the MH theory in describing the solubility of various organic compounds in PE, ,,− the original MH model has two major issues. The model (like the Flory–Rehner theory ,,, ) makes inconsistent use of the Gaussian approximation for the tie-molecules’ end-to-end probability distribution.…”

Section: Methodsmentioning

confidence: 99%

Modeling Sorption of Hydrocarbons in Polyethylene with the SAFT-γ Mie Approach Combined with a Statistical-Mechanical Model to Describe Semicrystalline Polymers

Valsecchi,

Galindo,

Jackson

2023

Macromolecules

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A recently developed statistical-mechanical model is applied systematically to estimate the fraction of tie-molecules (polymer chains linking different crystals directly or via entanglements) in semicrystalline polyethylene (PE) samples. The amorphous domains of the polymer are divided into constrained interlamellar domains and “free” outer-lamellar domains. A set of model parameters is assigned to each sample by correlating previous experimental measurements and minimizing the difference between the predicted solubility of pure hydrocarbons in the sample and the experimental values. We show that the sorption isotherms of multiple pure fluids in each sample can be described by a single parameter set, proving that the polymer–solute interactions (described accurately by the SAFT-γ Mie EoS) are decoupled from the sample-specific properties of the polymer. We find that ∼30% of the crystalline stems in the lamellae of PE are connected to tie-molecules, within the bounds suggested by previous theoretical and computational work. The transferability of the sample-specific parameters is assessed by predicting cosolubility effects and solubility at different temperatures, leading to good agreement with experimental data.

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Section: Methodsmentioning

confidence: 99%

Modeling Sorption of Hydrocarbons in Polyethylene with the SAFT-γ Mie Approach Combined with a Statistical-Mechanical Model to Describe Semicrystalline Polymers

Valsecchi,

Galindo,

Jackson

2023

Macromolecules

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Modification of Fiber Surfaces by Monomeric Additives

Mareš

OXENRIDER

1978

Textile Research Journal

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In contrast to commonly used polymeric fluorocarbon finishes, a new approach to the modification of fiber surfaces by nionomcnc fluorocarbon additives is described. The additives are not simply deposited on the fiber surface, as demon strated by examination with scanning electron microscope and by excellent durability of the modified surface to abrasion, home-laundering, and dry-cleaning. The additives are concentrated in the fiber polymer near the fiber surface and held there due to their miscibility with the polymer matrix and due to their insolubility in soap solutions or in dry-cleaning solvents. Concentration as low as 0.25% of the additives on the weight of the fiber results in excellent water and oil repel lencies. The modified fiber can be knitted and dyed without affecting the surface properties.

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The Effect of Crystallinity on the Vapor-Phase Sorption of Acetone in Oriented Poly(ethylene terephthalate)

Cited by 2 publications

References 10 publications

Modeling Sorption of Hydrocarbons in Polyethylene with the SAFT-γ Mie Approach Combined with a Statistical-Mechanical Model to Describe Semicrystalline Polymers

Modeling Sorption of Hydrocarbons in Polyethylene with the SAFT-γ Mie Approach Combined with a Statistical-Mechanical Model to Describe Semicrystalline Polymers

Modification of Fiber Surfaces by Monomeric Additives

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