Phase behavior of ternary polymer blends with favorable interactions

Hsu, Wen-Ping

doi:10.1002/app.21669

Cited by 6 publications

(2 citation statements)

References 46 publications

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“…Many experimental and theoretical methods have been used to investigate polymer‐polymer miscibility in solution and in solid phase. Thermal analysis, electron microscopy, turbidity and viscometry are some of the methods extensively reported in literature . Unfortunately, none of these techniques reveal the important information on the nature of interfaces in a blend and compatibility of the chains involved in particular compositions.…”

Section: Introductionmentioning

confidence: 99%

Free volume as an internal material parameter to probe interfaces in ternary polymer blends: A positron lifetime study

Dinesh

Ranganathaiah

2013

J of Applied Polymer Sci

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A new method to characterize individual interfaces in ternary polymer blends from experimentally measured fractional free volume from Positron Annihilation Lifetime Spectroscopy (PALS) has been developed. By this, we derive the composition dependent miscibility level in ternary polymer blends. This method has its genesis in KRZ (Kirkwood-Risemann-Zimm) theory which introduces hydrodynamic interaction parameter as a measure of excess friction generated at the interface between dissimilar polymer chains resulting in energy dissipation. The method successfully applied for binary blends has been theoretically modified to suit ternary blends in the present work. The efficacy of this method has been tested for two ternary blends namely polycaprolactone/ poly(styrene-co-acrylonitrile)/poly(vinyl chloride) (PCL/SAN/PVC) and polycaprolactone/poly(vinyl chloride)/poly(vinyl acetate) (PCL/PVC/PVAc) in different compositions. We obtained a maximum effective hydrodynamic interaction (a eff ) of 212.60 at composition 80/10/10 of PCL/PVC/PVAc while PCL/SAN/PVC showed 21.60 at 68/16/16 composition. These results suggest that these compositions produce high miscibility level as compared to other compositions. DSC measurements have also been used to supplement positron results.

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Section: Introductionmentioning

confidence: 99%

Free volume as an internal material parameter to probe interfaces in ternary polymer blends: A positron lifetime study

Dinesh

Ranganathaiah

2013

J of Applied Polymer Sci

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“…22 On the other hand, thermodynamic studies on ternary polymer systems (TPS) use to deal with different types, such as solvent/solvent/polymer, [23][24][25] solvent/polymer/ polymer 26,27 and even ternary polymer blends. [28][29][30] For TPS with specific interactions, such as hydrogen-bonding, the classical thermodynamic Flory-Huggins (FH) theory cannot explain the blend miscibility. Therefore, more adequate approaches have been explored and developed, mainly based on the existence of association and self-association equilibria.…”

Section: Introductionmentioning

confidence: 99%

Modelling the hydrogen-bonding interactions in a copolymer/biodegradable homopolymer blend through excess functions

et al. 2008

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A recent theoretical approach based on the coupling of both the Flory-Huggins (FH) and the Association Equilibria thermodynamic (AET) theories was modified and adapted to study the miscibility properties of a multicomponent system formed by two polymers (a proton-donor and a proton-acceptor) and a proton-acceptor solvent, named copolymer(A)/solvent(B)/polymer(C). Compatibility between polymers was mainly attained by hydrogenbonding between the hydroxyl group on the phenol unit of the poly(styrene-co-vinyl phenol) (PSVPh) and the carbonyl group of the biodegradable and environmentally friendly poly(3-hydroxybutyrate) (PHB). However, the selfassociation of PSVPh and specific interactions between the PSVPh and the H-acceptor group (an ether oxygen atom) of the epichlorohydrin (ECH) solvent were also established in a lower extension, which competed with the polymer-polymer association. All the binary specific interactions and their dependence with the system composition as well as with the copolymer content were evaluated and quantified by means of two excess functions of the Gibbs free energy, Δg A Band Δg A C . Experimental results from fluorescence spectroscopy were consistent with the theoretical simulations derived with the model, which could also be applied and extended to predict the miscibility in solution of any polymer blend with specific interactions.

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Miscibility enhancement and formation of interpenetrating spherulites in ternary blends of crystalline polymers

Ikehara¹,

Kimura²,

Kataoka³

2010

J Polym Sci B Polym Phys

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Miscible blends of three crystalline polymers, namely poly(butylene succinate) (PBS), poly(ethylene succinate) (PES), and poly(oxyethylene) (POE), exhibited interpenetrating spherulites, where a spherulite of one component grows inside the spherulites of other components. PBS and PES were immiscible above the melting points, Tm, of these substances, while ternary blends with POE showed miscibility, which depended on the molecular weight of POE. PBS and PES exhibited the same spherulitic growth process as in a miscible binary blend when they were crystallized from a homogeneous ternary melt. Spherulites of PBS, which is the highest‐Tm component, filled the whole volume first when a miscible ternary blend was quenched below Tm of POE, the lowest‐Tm component. Then, the blends showed either two types of crystallization processes. One was successive nucleation and growth of PES and POE spherulites, that is, PES nucleated and developed spherulites inside the PBS spherulites and then POE spherulites grew inside the interlocked spherulites of PBS and PES. The other was simultaneous growth and the formation of interpenetrating spherulites of PES and POE inside the PBS spherulites. © 2010 Wiley Periodicals, Inc. J Polym Sci Part B: Polym Phys 48: 706–711, 2010

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Phase behavior of ternary polymer blends with favorable interactions

Cited by 6 publications

References 46 publications

Free volume as an internal material parameter to probe interfaces in ternary polymer blends: A positron lifetime study

Free volume as an internal material parameter to probe interfaces in ternary polymer blends: A positron lifetime study

Modelling the hydrogen-bonding interactions in a copolymer/biodegradable homopolymer blend through excess functions

Miscibility enhancement and formation of interpenetrating spherulites in ternary blends of crystalline polymers

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