Co-continuous morphology development in partially miscible PMMA/PC blends

Marin, N.; Favis, Basil D.

doi:10.1016/s0032-3861(02)00280-x

Cited by 92 publications

(75 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As mentioned earlier, Marin et al [32] observed similar tendencies for a low interfacial tension PMMA/PC system. They were able to relate those deviations to the partial miscibility of PMMA/PC.…”

Section: Morphological Characteristics Of Partial Miscibilitysupporting

confidence: 68%

“…Thus, unlike completely miscible systems in which the blends show a single T g for both blend components (as indicated by the solid line in Fig. 2 and predicted using the Fox equation [49]), or for a partially miscible system [32] in which the blends show two intermediate T g s, the T g s in EPDM/PP blends remain unchanged for PP, and actually decrease with respect to pure EPDM. Mäder et al [50] have observed similar phenomenon of T g depression of styrene-ethylene-butylene-styrene (SEBS), and poly(ethane-co-1-octene) (EO) elastomers melt blended with PPs of different stereoregularities.…”

Section: Interfacial Tension and Miscibility/immiscibilitymentioning

confidence: 91%

“…Recently, Marin et al [32] studied the co-continuous morphology development in partially miscible poly(methyl methacrylate) (PMMA)/polycarbonate (PC) blends. Both polymers are amorphous in nature and possess an interfacial tension of 0.6 mN/m.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Continuity development in polymer blends of very low interfacial tension

Bhadane

Champagne

Huneault

et al. 2006

Polymer

View full text Add to dashboard Cite

Continuity development in polymer blends of very low interfacial tension AbstractPhase continuity development and co-continuous morphologies are highly influenced by the nature of the interface in immiscible polymer blends. Blends of ethylene-propylene-diene terpolymer (EPDM) and polypropylene (PP) possess an interfacial tension of about 0.3 mN/m and provide an interesting model system to study the detailed morphology development in a very low interfacial tension binary system. A variety of blends with viscosity ratios of 0.2-5.0 and shear stresses of 11.7-231.4 kPa were considered. Using a variety of sophisticated morphology protocols it is shown that at low blend compositions, the dispersed phase actually exists as stable fibers of extremely small diameter of 50-200 nm and the continuity develops by fiber-fiber coalescence. An analysis using break-up times from Tomotika theory also supports the notion of highly stable dispersed fiber formation. These results challenge the current view of the dispersed phase as small spherical droplets. It is shown, under these conditions, that a seven-fold variation in the viscosity ratio has virtually no influence on % continuity or morphology, while a large change in the matrix shear stress from 11.7 to 90.9 kPa has an important effect on pore diameter. Both sides of the continuity diagram are studied and highly symmetrical continuity behavior is observed with composition. In fact a single master continuity curve is observed for these blends varying in viscosity ratio from 0.7-5.0 and with shear stresses from 11.7-90.9 kPa. Although the glass transition temperatures indicate that these materials are completely immiscible after melt mixing and cooling, it is shown that the blends demonstrate the morphological features of a partially miscible system. These results support a concept that the blend was partially miscible during melt blending, at which time the gross morphological features of the blend were developed, but becomes fully phase separated upon cooling. It appears that the quenching of the EPDM/PP blend from the melt is rapid enough to preserve the imprint of that partial miscibility on the gross blend morphology. q

show abstract

Section: Morphological Characteristics Of Partial Miscibilitysupporting

confidence: 68%

Section: Interfacial Tension and Miscibility/immiscibilitymentioning

confidence: 91%

See 1 more Smart Citation

Continuity development in polymer blends of very low interfacial tension

Bhadane

Champagne

Huneault

et al. 2006

Polymer

View full text Add to dashboard Cite

show abstract

“…[11] The formation of continuous PLA phase in such low concentrations, therefore, indicates that the selectively localized clay tactoids may change continuity development and even broaden inversion region. Favis and co-workers [60,61] defined three types of co-continuous systems in their work: the binary compatible blends (partially miscible) with low interfacial tension, the immiscible blends with high interfacial tension and the ternary compatibilized blends. According to this definition, the PLA/PCL blends belong to Type-II systems, namely immiscible blends, which show the main features of continuity development with high percolation threshold and narrow co-continuous region.…”

Section: Phase Morphologies Of the Ternary Systemsmentioning

confidence: 99%

Selective Localization of Nanofillers: Effect on Morphology and Crystallization of PLA/PCL Blends

Lin

Zhang

et al. 2011

Macro Chemistry & Physics

235

176

View full text Add to dashboard Cite

Adding nanofillers to PLA/PCL blends to change their surface and interface properties can improve their phase morphology. Here the selective localization of CNTs and organoclays as the third component in the blend is studied. It is found that clay is selectively localized in the PLA phase and at the phase interface whereas CNTs are mainly found in the PCL phase and at the phase interface. With a reduced viscosity ratio of the blend matrices, the CNTs change their preferred localization from PCL to PLA. The effects of the different selective localization of clay and CNTs on the morphologies are studied. In addition, the crystallization behavior of ternary systems also shows a strong dependence on the selective localization of nanofillers. magnified image

show abstract

“…These two polymers have similar mechanical and thermal properties: density, thermal conductivity, thermal diffusivity, thermal expansion coefficient, and Young's modulus. [10][11][12] Furthermore, their refractive index temperature dependences are well known. 4,9,13 However, to our knowledge, studies of PC/PMMA film properties as a function of constituent concentration and temperature for thin films were not reported previously.…”

Section: Introductionmentioning

confidence: 99%

Refractive index control in bicomponent polymer films for integrated thermo-optical applications

Soave

2009

Opt. Eng

View full text Add to dashboard Cite

Abstract. Optical properties of transparent polymer thin films, produced by spin-coating on silicon and constituted of polycarbonate ͑PC͒, poly͑methyl methacrylate͒ ͑PMMA͒, and PC/PMMA, were investigated with regard to integrated thermo-optical ͑TO͒ device applications. Refractive index dependences on wavelength, temperature, and film composition were measured by spectroscopic ellipsometry with a dedicated autocontrolled heater setup, in the ranges of 400 to 800 nm, 25 to 85°C and 0 to 100 wt % PC, respectively, with determination of Cauchy and Lorentz-Lorenz parameters. Within these intervals, thermomechanical compatibility and pronounced index contrast of around 0.12 between PC and PMMA, as well as their TO coefficients one order of magnitude higher than that of silica, allow convenient tailoring for specific TO requirements. In addition, wide-range fine-tuning of refractive index variation is found to be facilitated by the weak dependence of isothermal dispersion curves and TO coefficients on film composition.

show abstract

Co-continuous morphology development in partially miscible PMMA/PC blends

Cited by 92 publications

References 21 publications

Continuity development in polymer blends of very low interfacial tension

Continuity development in polymer blends of very low interfacial tension

Selective Localization of Nanofillers: Effect on Morphology and Crystallization of PLA/PCL Blends

Refractive index control in bicomponent polymer films for integrated thermo-optical applications

Contact Info

Product

Resources

About