Interfacial Tension of Immiscible Polymer Blends: Temperature and Molecular Weight Dependence.

Anastasiadis, S. H.; Gancarz, I.; Koberstein, Jeffrey T.

doi:10.21236/ada192463

Cited by 9 publications

(9 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Using the above validated protocol allows to measure three dimensional PS drop profiles on PMMA and to determine the contact angles and the ratios of the surface tensions from their equilibrium shapes. These values will serve as input parameters for the computed drop morphologies and could not be found in literature with the needed precision [25,26].…”

Section: Extraction Of Surface Tension and Contact Anglesmentioning

confidence: 99%

Droplets on liquids and their journey into equilibrium

et al. 2013

View full text Add to dashboard Cite

The morphological path of droplets on a liquid substrate towards equilibrium is investigated experimentally and theoretically. The droplets emerge in the late stage of a dewetting process of short chained polystyrene (PS) dewetting from liquid polymethyl-methacrylate (PMMA). The three-dimensional droplet profiles are obtained experimentally by combining the in situ imaged PS/air interface during equilibration and the ex situ imaged PS/PMMA interface after removal of the PS by a selective solvent. Numerically the transient drop shapes are calculated by solving the thin-film equation in lubrication approximation using the experimentally determined input parameter like viscosity, film thickness and surface tensions. The numerically obtained droplet morphologies and time scales agree very well with the experimental drop shapes. An unexpected observation is that droplets with identical volumes synchronise their motion and become independent of the initial geometry long time before equilibrium is reached.

show abstract

Section: Extraction Of Surface Tension and Contact Anglesmentioning

confidence: 99%

Droplets on liquids and their journey into equilibrium

et al. 2013

View full text Add to dashboard Cite

show abstract

“…The intermediate composition can promote formation from multilayers of dual phase continuous morphologies and possible concomitant potential large changes in release rates. Interfacial tension in these blends, which is partly responsible for morphology transformations, can arise due to the diffusion of molecules of lower molecular weight to interfaces [32,33]. Results can consequently depend on polydispersity, interfacial area formation, residence time, and film cooling.…”

Section: Experimental Methodsmentioning

confidence: 99%

Tailored Additive Release Rates in Extruded Plastic Films Produced With Smart Blending Machines

Zumbrunnen

Balasubramanian

et al. 2009

Journal of Plastic Film & Sheeting

View full text Add to dashboard Cite

Smart blenders controllably form multi-component polymer melts into a wide variety of fine-scale structural arrangements that can be retained in extruded plastics. The machines operate on the principle of chaotic advection, a recent subfield of fluid mechanics, and have been used to produce cast film and blown film but can also be used to extrude sheet, rod, tubing, and other products. Because and structure of a composite material influences greatly additive diffusion, and matrix dissolution, this processing method provides a means for producing packaging film, medications, and medical implants with tailored release rates of active compounds. In this article, an ability to alter release rates of tocopherol, a natural antioxidant of importance to food packaging, is specifically investigated via on-line specification of a process parameter governing blend morphology in extruded cast films. Blends of lowdensity polyethylene and polypropylene, and also low-density polyethylene and high-density polyethylene were used.

show abstract

“…However, the data were not enough to obtain the quantitative relation between interfacial tension and molecular weight in this work. Fortunately, many published literatures 13,[17][18][19][20] systematically studied the effect of molecular weight on the interfacial tension between polymers with a broad range of molecular weight. Literature reports show that the interfacial tension for polymer pairs increases as the molecular weight of one of the components increases, and the interfacial tension will be level off when the molecular weights of polymers are way above their entanglement molecular weight M e .…”

Section: Effect Of Temperature On the Interfacial Tension Of Ps/ppmentioning

confidence: 99%

Study on the interfacial tension of immiscible polystyrene/polypropylene blend with deformed drop retraction method

Dan

Ren

et al. 2018

Journal of Thermoplastic Composite Materials

View full text Add to dashboard Cite

To quantify the relation between process condition, raw materials’ properties, and the interfacial tension of polystyrene (PS)/polypropylene (PP) blend, we evaluated the effect of temperature and molecular weight on the interfacial tension of PS/PP blend with deformed drop retraction method. The accuracy of measurement was improved by eliminating the residual stress in polymers and selecting retraction scale of imbedded PS fiber. Results show that the interfacial tension of PS/PP blends decreases lineally with increasing temperature. The temperature coefficient of PS/PP blends is of the same order of magnitude as reported in the PS/PP systems in the case of similar weight distribution of PS. A primary quantitative relation between interfacial tension, temperature, and molecular weight was established, which could be utilized to guide the design of novel polymer blends.

show abstract

Interfacial Tension of Immiscible Polymer Blends: Temperature and Molecular Weight Dependence.

Cited by 9 publications

References 2 publications

Droplets on liquids and their journey into equilibrium

Droplets on liquids and their journey into equilibrium

Tailored Additive Release Rates in Extruded Plastic Films Produced With Smart Blending Machines

Study on the interfacial tension of immiscible polystyrene/polypropylene blend with deformed drop retraction method

Contact Info

Product

Resources

About