Modeling of the phase behavior of binary and ternary blends involving copolymers of styrene, methyl methacrylate and cyclohexyl methacrylate

Pomposo, José A.; Múgica, Agurtzane; Areizaga, J.; Cortázar, M.

doi:10.1002/(sici)1521-4044(199806)49:6<301::aid-apol301>3.0.co;2-t

Cited by 14 publications

(31 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Alternatively, a simpler mean field binary interaction model with temperature-dependent interaction parameters was 108 Journal of Nano Research Vol. 2 used to estimate the interaction energy between PS and PVME [11,12]. Hence, modelling of the LCST phase boundary of PVME / poly(styrene-co-methyl methacrylate)…”

Section: Resultsmentioning

confidence: 99%

A Theoretical Investigation of Polymer-Nanoparticles as Miscibility Improvers in All-Polymer Nanocomposites

Luzuriaga

Grande

Pomposo

2008

JNanoR

View full text Add to dashboard Cite

Abstract. The miscibility behaviour of polymer-nanoparticle / linear-polymer blends (all-polymer nanocomposites) has been investigated using an incompressible mean-field theoretical model that accounts for combinatorial, temperature-dependent exchange interaction energy and nanoparticle-driven effects. The theory is employed to predict the phase diagram of poly(styrene)-nanoparticle (PS-np) / linear-poly(vinyl methyl ether) (PVME) nanocomposites from room temperature to 675 K. Complete miscibility is predicted for PS-nanoparticles with radius < 6 nm blended with PVME (molecular weight 62 500 g/mol, nanoparticle volume fraction 20 %). The effect of PVME molecular weight and blend composition on the miscibility diagram is also addressed.When compared to the well-known experimental phase diagram of linear-PS / PVME blends displaying lower critical solution temperature (LCST) behaviour, the miscibility improving effect of sub-10 nm PS-nanoparticles is clearly highlighted. In terms of the model, this favourable nanoscale effect arises mainly from the reduced stretching induced by the sub-10 nm nanoparticles and the increased exothermic contacts when compared to nanoparticles with sizes > 10 nm.

show abstract

Section: Resultsmentioning

confidence: 99%

A Theoretical Investigation of Polymer-Nanoparticles as Miscibility Improvers in All-Polymer Nanocomposites

Luzuriaga

Grande

Pomposo

2008

JNanoR

View full text Add to dashboard Cite

show abstract

“…For the P(CHMA-co-MMA)/PAMS system, it was not possible to find experimentally the LCST at copolymer compositions with high content of CHMA, because the cloud points exceed the thermal decomposition. Thus, for the calculations [12] in this system, we have assumed that the copolymer composition at extreme (x 0 ) is 80 wt% CHMA, a reasonable value based on preliminary calculations. The phase diagram of P(CHMA-co-MMA)/PS blends deter-mined by Nishimoto et al [17] has been also included in this figure for comparison.…”

Section: Determination Of Temperature-dependent Segmental Interactionmentioning

confidence: 99%

“…The phase diagram of P(CHMA-co-MMA)/PS blends has been employed previously [12] by us to obtain the temperature dependence of the S/CHMA and CHMA/MMA interaction parameters. In this paper, we will use the same procedure as before (see Eqs.…”

Section: Determination Of Temperature-dependent Segmental Interactionmentioning

confidence: 99%

“…Although the v ij (T) parameters themselves are very useful for predicting LCST behavior, the database is not large and only for a few cases is v ij known as a function of temperature [9 -11]. By applying the methodology described in a previous paper [12] to the LCST phase diagram of a given homopolymer/copolymer system and providing one of the segmental interaction parameters is previously known (e. g. v AB (T)), we can determine two segmental interaction parameters (e. g. v…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effect of monomer architecture on segmental interaction parameters of binary blends involving copolymers of cyclohexyl methacrylate, methyl methacrylate and styrene derivatives

Múgica¹,

Barral²,

Pomposo

et al. 1999

Acta Polym.

Self Cite

View full text Add to dashboard Cite

The phase behavior of binary blends of poly(cyclohexyl methacrylate‐co‐methyl methacrylate) (P(CHMA‐co‐MMA)) copolymers with poly(α‐methylstyrene) (PAMS) and poly(p‐methylstyrene) (PPMS) has been determined experimentally and compared to that of the P(CHMA‐co‐MMA)/PS system. The enthalpic and entropic parts of the segmental interaction parameter for each binary monomer pair involved have been determined from a fit of the lower critical solution temperature (LCST) behavior of these systems, with the aid of Flory‐Huggins (FH) theory which incorporates temperature dependent interaction parameters. The results reveal that the strength of the interaction with the copolymer P(CHMA‐co‐MMA) decreases in the following order: PAMS > PS > PPMS. These differences are also illustrated in the glass transition (Tg)‐composition curves of the above systems as well as in analog calorimetry results and scanning electron microscopy (SEM) studies. Good agreement is obtained when various theoretical miscibility windows for binary blends of copolymers involving CHMA, MMA and styrene derivatives are compared to experimental data. Thus it is shown that the subtle difference of monomer structures is captured to a good degree by the segmental interaction parameters derived from phase behavior.

show abstract

“…Tompa [6] analyzed the phase relationships for systems of two polymers and a solvent. Based on this approach, phase diagrams of immiscible polymer pairs and a solvent were calculated using v ij parameters experimentally obtained by different techniques, such as glass transition and cloud point measurements, with good agreement [7][8][9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Liquid–liquid equilibria for ternary polymer mixtures

Bae

2011

Chemical Physics

View full text Add to dashboard Cite

Modeling of the phase behavior of binary and ternary blends involving copolymers of styrene, methyl methacrylate and cyclohexyl methacrylate

Cited by 14 publications

References 25 publications

A Theoretical Investigation of Polymer-Nanoparticles as Miscibility Improvers in All-Polymer Nanocomposites

A Theoretical Investigation of Polymer-Nanoparticles as Miscibility Improvers in All-Polymer Nanocomposites

Effect of monomer architecture on segmental interaction parameters of binary blends involving copolymers of cyclohexyl methacrylate, methyl methacrylate and styrene derivatives

Liquid–liquid equilibria for ternary polymer mixtures

Contact Info

Product

Resources

About