Viscoelastic properties of polystyrene–polycarbonate blends in melt

Lipatov, Yu.S.; Shumsky, V.F.; Gorbatenko, A. N.; Panov, Yu.N.; Bolotnikova, L.S.

doi:10.1002/app.1981.070260210

Cited by 32 publications

(8 citation statements)

References 1 publication

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“…Applications of polycarbonate in practical use are by blending with other polymers as well as by itself. A number of studies have appeared on the blend system of polycarbonate and other polymers such as ABS or SAN,14–19 polyolefins,18–23 polyesters,24–28 polyamide, and poly(ε‐caprolactone),29 etc 30–32. However, there are a few studies on the blend of linear and branched polycarbonates 33, 34.…”

Section: Introductionmentioning

confidence: 99%

Study of mechanical and rheological behaviors of linear and branched polycarbonates blends

Lyu¹,

Lee²,

Pae

2001

J of Applied Polymer Sci

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A study of the mechanical and rheological properties of linear and branched polycarbonates blends is presented. Phase separations of the blends were checked through DSC and SEM, and, subsequently, mechanical and rheological properties were investigated. Phase separations were not observed in the blends. The mechanical properties were examined through tensile, flexural, and impact tests. All the mechanical properties of the blends were relatively independent of the compositions. For study of the rheological properties, melt viscosity, storage and loss moduli, and melt tension of the blends with various compositions were examined at various temperatures. The dependence of the viscosity on the molecular weight was also studied. As the content of branched polycarbonate increases, the dependence of the viscosity on the molecular weight and the shear thinning behavior became more marked. Melt tensions were also increased as the branched polycarbonate content increased in the blends for all tested temperatures. In this study, the blend systems which have same mechanical properties but different rheological properties can be obtained through blending of linear and branched polycarbonates.

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Section: Introductionmentioning

confidence: 99%

Study of mechanical and rheological behaviors of linear and branched polycarbonates blends

Lyu¹,

Lee²,

Pae

2001

J of Applied Polymer Sci

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“…Eq. (8), (9), and (10) are simply reformed as a function of temperature on the basis of the heating rates (scan rates of the heating and cooling are set at 10 8C/min; t TÀT 0 10 , T( 8C), T 0 = initial temperature).…”

Section: Heating Processmentioning

confidence: 99%

“…Hignchi reports that as the polymer approaches the transition region, viscoelastic properties increasingly tend to be controlled by the free volume 8) . Lipatov assumed temperature dependency of the free volume is generally linear 9) ,…”

Section: Heating Processmentioning

confidence: 99%

Thermal stress analysis for polyimide thin film: The effect of solvent evaporation

Bae¹

2000

Macromol. Theory Simul.

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We propose a stress model to account for the thermal stress caused by a mismatch of isobaric expansivity, solvent evaporation, and imidization. The evaporation strain term is given as functions of a viscosity, and solvent weight fraction. The proposed model is in very good agreement with experimental data and gives useful information about the analysis of the thermal stress caused in polymeric films.

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“…Hignchi 11) reports that as the polymer approaches the transition region, the viscoelastic properties increasingly tend to be controlled by free volume and supports the importance of the free volume. Lipatov assumed temperature dependency of free volume is generally linear 12)…”

Section: Heating Processmentioning

confidence: 99%

Thermal stress analysis for polyimide thin film and a substrate layer system

Bae

2000

Macromol. Chem. Phys.

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We propose an analytical model based on Timoshenko's theory which describes chemical and physical properties of a polymer and a substrate layer system. This temperature dependent model is developed to account for the thermal stress caused by a mismatch of isobaric expansivity, due to the solvent evaporation and imidization. The stress‐temperature profiles calculated from the proposed model are compared with experimental data for the given systems. The model gives a qualitative information for the stress development during the heating‐cooling process.

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Viscoelastic properties of polystyrene–polycarbonate blends in melt

Cited by 32 publications

References 1 publication

Study of mechanical and rheological behaviors of linear and branched polycarbonates blends

Study of mechanical and rheological behaviors of linear and branched polycarbonates blends

Thermal stress analysis for polyimide thin film: The effect of solvent evaporation

Thermal stress analysis for polyimide thin film and a substrate layer system

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