Compatibility characterization of polycarbonate/copolyester blends

Samios, Costas K.; Kalfoglou, Nikos K.

doi:10.1016/s0032-3861(99)00803-4

Cited by 18 publications

(19 citation statements)

References 38 publications

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“…The mechanical behavior at large strains, in particular the e b , is a sensitive indicator of the interphase adhesion in the blends. [25,26,29] These relevant ductility values are fully coherent with the aforementioned good interfacial adhesion and are aided by the unusually low particle size of the blends. At intermediate compositions the particle size was not small, but the presence of fine matrix particles inside, clearly makes the blends mechanically more homogeneous, and therefore more prone to positive fracture behaviors.…”

Section: Mechanical Propertiesmentioning

confidence: 54%

“…It is useful, especially for its clarity, transparency and toughness, for applications such as blister packaging, bags, etc. [22] Blends of an amorphous copolyester similar to PCTG but with different proportion of the components, [23] with PBT, [24,25] bisphenol A polycarbonate (PC), [26] EVOH, [27] PET, [28] ethylene-vinyl acetate (EVA) copolymer, [29] liquid-crystal polymers (LCP), [30] amorphous polyamide [31] and a maleated thermoplastic elastomer (TPEg) [32,33] have been studied in the literature.…”

Section: Discussionmentioning

confidence: 99%

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High Compatibility and Improved Barrier Performance in Blends Based on a Copolyester Modified with a Poly(amino ether) Resin

Granado

Eguiazábal

Nazábal

2006

Macro Materials & Eng

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Summary: The structure and properties of blends of a PCTG and a PAE resin obtained by direct injection molding have been studied. The blends were almost immiscible, and were composed of a nearly pure PAE phase and a mixed PCTG‐rich phase containing minor PAE amounts. Electron microscopy observations showed a high intermixing level between both components. The permeability data indicated an improved barrier protection of PCTG upon PAE addition. The Young's modulus and the yield stress of the blends followed a linear behavior with respect to composition, while values close or slightly below linearity were observed for the break properties. The combined effects of the small dispersed particle size and the proposed good interfacial adhesion are stated as the main factors responsible for the positive mechanical behavior. The impact strength showed an unexpected variability for PCTG‐rich blends, which is attributed to a ductile‐brittle transition of PCTG.Ductility of PCTG/PAE blends vs. composition.magnified imageDuctility of PCTG/PAE blends vs. composition.

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Section: Mechanical Propertiesmentioning

confidence: 54%

Section: Discussionmentioning

confidence: 99%

High Compatibility and Improved Barrier Performance in Blends Based on a Copolyester Modified with a Poly(amino ether) Resin

Granado

Eguiazábal

Nazábal

2006

Macro Materials & Eng

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“…It is known that a small dispersed phase size is necessary to obtain compatible polymer blends 26,37,42 This is because the large stress concentrations provoked by large dispersed particles lead to early failure. The low dispersed phase size of PBT-PAE blends (0.4-1 m) is probably one reason for the observed positive behavior, which has also been seen in partially miscible blends such as polyetherimide-polyarylate 43 It is also known that, although significant exceptions exist, 44 the strain at break usually depends strongly on the blend miscibility, 26,45 and more specifically on the interfacial adhesion between components. 1 The almost linear behavior of ductility with composition displayed in Figure 11 indicates that, as was seen previously from the morphological observations, the adhesion between the blend components was good enough to allow an efficient stress transfer from the matrix to the dispersed phase.…”

Section: Mechanical Propertiesmentioning

confidence: 90%

Phase behavior and mechanical properties of blends of poly(butylene terephthalate) and poly(amino–ether) resin

Granado¹,

Eguiazábal²,

Nazábal³

2003

J of Applied Polymer Sci

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ABSTRACT:The structure, thermal and mechanical properties of blends of poly(butylene terephthalate) (PBT) and a poly(amino-ether) (PAE) barrier resin obtained by direct injection molding are reported. The slight shift of the glass transition temperatures (T g ) of the pure components when blended is attributed to partial miscibility rather than interchange reactions. Both the small strain and the break properties of the blends were close or even above those predicted by the direct rule of mixtures. The specific volume of the blends appeared to be the main reason for the modulus behavior. The linear values of the elongation at break indicated that the blends were compatible, and were attributed to a combination of good adhesion between the two phases of the blends and the small size of the dispersed phases.

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“…The blends of polycarbonate (PC) with poly(alkylene terephthalates), particularly poly(ethylene terephthalate) (PET), have been the subject of much attention from researchers as well as scientific schools [1][2][3][4]. This can mainly be explained by growing possibilities for developing PET/PC-based engineering materials; their properties are far more advantageous than those of the two homopolymers.…”

Section: Introductionmentioning

confidence: 99%

Structural features and relaxation properties of PET/PC blends containing impact strength modifier and chain extender

Песецкий¹,

Filimonov²,

Koval³

et al. 2009

Express Polym. Lett.

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Abstract. It has been investigated how methylene diphenyl diisocyanate (MDI) influences the morphology, rheological, mechanical and relaxation properties, as well as PET crystallizability, of PET/PC/(PP/EPDM) ternary blends produced by the reactive extrusion process. It appears that irrespective of phase structure of the blends, MDI causes a rise in melt viscosity (decreased MFI-values) of the material which is the result of an increased molecular weight of the macromolecules; PET crystallization becomes retarded. MDI improves compatibility between PET and PC in PET/PC/(PP/EPDM) ternary blends. Addition of MDI leads to higher values of the dynamic shear modulus for PET high elastic state (in the temperature range between Tg PET and cool crystallization temperature of PET); the PET cool crystallization and melt crystallization processes become retarded; the PET and PC glass transition temperatures approach one another. MDI has been shown not to influence significantly the blend morphology or the character of interaction between the PP/EPDM disperse phase and PET/PC blend matrix.

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Compatibility characterization of polycarbonate/copolyester blends

Cited by 18 publications

References 38 publications

High Compatibility and Improved Barrier Performance in Blends Based on a Copolyester Modified with a Poly(amino ether) Resin

High Compatibility and Improved Barrier Performance in Blends Based on a Copolyester Modified with a Poly(amino ether) Resin

Phase behavior and mechanical properties of blends of poly(butylene terephthalate) and poly(amino–ether) resin

Structural features and relaxation properties of PET/PC blends containing impact strength modifier and chain extender

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