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Acrylonitrile–butadiene–styrene-toughened polysulphone of bisphenol A blends: influence of processing temperature and composition (1997)

RUIZ DE GAUNA, B. E ; GAZTELUMENDI, M ; NAZABAL, J

Springer

Journal of materials science 32 (1997), S. 971-977

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ISSN: 1573-4803

Source: Springer Online Journal Archives 1860-2000

Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics

Notes: Abstract Polysulphone of bisphenol A (PSU)/acrylonitrile–butadiene–styrene (ABS) blends have been obtained by direct injection moulding at different temperatures and for compositions in the PSU-rich range. Direct injection moulding provided a mixing level similar to that of kneading. The blends were almost fully immiscible with the exception of the polybutadiene (PBD) phase where some PSU appeared to be present. Only a very small amount of ABS was required to greatly improve the tracking index of PSU. The mechanical properties, however, were those of a compatible material, and did not depend on the injection temperature. Moreover, with the exception of the ductility, they were in fairly good proportion to the blend composition, and provided the most balanced set of properties at an ABS content near 5%.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1023/A:1018566019772

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Transitions and mechanical properties in polyoxymethylene/phenoxy blends (1996)

Erro, R. ; Gaztelumendi, M. ; Nazabal, J.

Bognor Regis [u.a.] : Wiley-Blackwell

Journal of Polymer Science Part B: Polymer Physics 34 (1996), S. 1055-1062

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ISSN: 0887-6266

Keywords: polyoxymethylene ; phenoxy ; transitions ; miscibility ; mechanical properties ; Chemistry ; Polymer and Materials Science

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology , Physics

Notes: Blends of polyoxymethylene (POM) and phenoxy were obtained by melt-blending to determine their phase behavior and to determine, among others, their dynamic and static mechanical properties. The dynamic mechanical spectrum of POM showed an unusually wide peak below the melting temperature that was attributed to amorphous POM close to, and hindered by, the predominant crystalline phase. The Tg of phenoxy was constant with composition, as was probably that of POM, proving their complete immiscibility. The overall mechanical properties of the blends, however, were those of a compatible blend. The synergism in ductility observed in POM-poor blends was partially attributed to their lesser crystalline character. © 1996 John Wiley & Sons, Inc.

Additional Material: 9 Ill.

Type of Medium: Electronic Resource

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Phase behavior and miscibility limits in PC/hytrel blends (1995)

Gaztelumendi, M. ; Nazabal, J.

Bognor Regis [u.a.] : Wiley-Blackwell

Journal of Polymer Science Part B: Polymer Physics 33 (1995), S. 603-610

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ISSN: 0887-6266

Keywords: copolyetherester ; polycarbonate ; miscibility ; phase separation ; Chemistry ; Polymer and Materials Science

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Chemistry and Pharmacology , Physics

Notes: Polycarbonate of bisphenol-A (PC)/copolyetherester (Hy) blends have been obtained by melt mixing over the complete composition range. After testing the lack of interchange reactions and degradation under the conditions studied, the miscibility state was studied by DSC and DMTA. The blends appeared to be miscible in the melt state. A fairly complex phase behavior was obtained in the solid state with Tg-composition plots showing a single Tg at most of the compositions but very different after the first and second scans. This was attributed to the different crystalline content of the blends before the two scans. The presence of a Hy crystalline phase and a single PC/Hy amorphous phase in all the blends, with the exception of the 20/80 composition, was verified by DMTA. Several thermal treatments showed the presence of an immiscibility range and, thus, the presence of a UCST. A LCST, which in the case of the 50/50 and 40/60 blends would be at roughly 75°C, will also probably exist. © 1995 John Wiley & Sons, Inc.

Additional Material: 9 Ill.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1002/polb.1995.090330410

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