Influence of composition on the morphology of polypropylene/polycarbonate blends☆

Favis, Basil D.; Chalifoux, J.‐P.

doi:10.1016/0032-3861(88)90388-6

Cited by 270 publications

(144 citation statements)

References 12 publications

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“…It is worth noting that at 100 rad s −1 , i.e. at shear rate close to that one calculated for the Brabender mixing chamber (185 s −1 ) [14], PS and SBR have quite a comparable viscosity (4.4×10 2 Pa s for PS and 3.2×10 2 Pa s for SBR), which is smaller than the viscosity of PE (9.6×10 2 Pa s). Fig.…”

Section: Mechanical Propertiessupporting

confidence: 68%

“…This evolution is maintained when the more viscous PE forms the matrix and contains decreasing amount of less viscous dispersed phases. The torques of the ternary blends show a negative deviation with respect to the additivity rule, which is typical for binary immiscible blends [14]. Fig.…”

Section: Table 3 Torque Ratio At 200°cmentioning

confidence: 63%

“…It is generally accepted that the size of the minor phase in binary blends decreases with decreasing interfacial tension, torque ratio (down to ca. 0.25) and elasticity of the dispersed phase [14,[16][17][18]. In the particular case of ternary blends with core-shell dispersed phases, the core-size might be assumed to be affected by the torque ratio of the core-forming polymer with respect to the shell precursor.…”

Section: Mechanical Propertiesmentioning

confidence: 99%

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Dependence of phase morphology and mechanical properties of PS/SBR/PE ternary blends on composition: transition from core–shell to triple-phase continuity structures

Luzinov

Pagnoulle

Jérôme

2000

Polymer

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The weight ratio of PE and PS in ternary PS/SBR/PE blends has been changed at constant SBR content (25 wt%). When the matrix is either PE or PS, the dispersed phase has a core-shell structure with SBR forming the shell. The size of the core expectedly increases with the content of the core-forming polymer. In some composition range, the three phases are simultaneously continuous, SBR being localized in between the cocontinuous PE and PS phases. The ultimate mechanical properties of the ternary blends containing SBR/PE and SBR/PS core-shell dispersed phases are close to the properties of the PS/SBR and PE/SBR binary blends, respectively. Some synergism in the elongation at break of the ternary blends is observed when core-shell SBR/PS phases are dispersed in PE matrix.

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Section: Mechanical Propertiessupporting

confidence: 68%

Section: Table 3 Torque Ratio At 200°cmentioning

confidence: 63%

Section: Mechanical Propertiesmentioning

confidence: 99%

See 1 more Smart Citation

Dependence of phase morphology and mechanical properties of PS/SBR/PE ternary blends on composition: transition from core–shell to triple-phase continuity structures

Luzinov

Pagnoulle

Jérôme

2000

Polymer

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“…Two sets of experimental data (Tokita, 1976;Favis & Chalifoux, 1988) displaying this trend are shown in Fig. 14.…”

Section: Volume Fractionmentioning

confidence: 77%

Mixing of viscous immiscible liquids. Part 1: Computational models for strong–weak and continuous flow systems

DeRoussel

Khakhar

Ottino

2001

Chemical Engineering Science

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“…Morphologies in an immiscible polymer blend consist of the size, shape, and orientation of the phases. It is well known that, during the melt processing, several factors are important to determine the final size and shape of the dispersed phase: composition, interfacial tension, time of the mixing, shear rate or shear stress, elasticity of the components, and viscosity ratio [3,4]. Polymer blends exhibit many interesting behaviors, including enhanced elasticity at a small strain, drop-size hysteresis, enhanced shear thinning, and the stress relaxation curves whose shapes are sensitive to deformation history.…”

Section: Introductionmentioning

confidence: 99%

Morphology development of PC/PE blends during compounding in a twin‐screw extruder

Yin

et al. 2006

Polymer Engineering & Sci

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The morphological development of a polycarbonate/ polyethylene (PC/PE) blend in a twin-screw extruder was studied using a scanning electron microscope (SEM). The effects of extrusion temperature, viscosity ratio (the ratio of the viscosity of the dispersed phase to that of the matrix), and the screw configuration on the morphology of the PC/PE blend during the extrusion were discussed in detail. It was found that the morphology of the dispersed particles and the interfacial adhesion between the dispersed phase and matrix were both influenced by the extrusion temperature. The dispersed phase had a spheroidal shape and a small size during the high temperature processing, and an irregular shape and a large size when it was processed at low temperature. The PC phase with a lower viscosity was easier to disperse and also to coalesce. Therefore, the deformation of the low-viscosity dispersed phase during the processing was more intense than that of the high-viscosity dispersed phase. By comparing the effects of the different screw configurations on the morphology development of the PC/PE blend, it was found that the melting and breaking up of the dispersed phase were mainly affected in the initial blending stages by the number of the kneading blocks. While a kneading block with a 90 degree staggering angle was used, the size of the dispersed particles decreased and the long fibers were shortened, the large particles were drawn by the additional kneading zone. Finally, all of these structures were completely changed to the short fibers. POLYM.

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Influence of composition on the morphology of polypropylene/polycarbonate blends☆

Cited by 270 publications

References 12 publications

Dependence of phase morphology and mechanical properties of PS/SBR/PE ternary blends on composition: transition from core–shell to triple-phase continuity structures

Dependence of phase morphology and mechanical properties of PS/SBR/PE ternary blends on composition: transition from core–shell to triple-phase continuity structures

Mixing of viscous immiscible liquids. Part 1: Computational models for strong–weak and continuous flow systems

Morphology development of PC/PE blends during compounding in a twin‐screw extruder

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