Partially miscible blends based on a polyarylate and poly(trimethylene terephthalate)

Guerrica-Echevarría, Gonzalo; Eguiazábal, J. I.; Nazábal, J.

doi:10.1002/app.20096

Cited by 25 publications

(33 citation statements)

References 21 publications

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“…Moreover, supposing that grafted instead of linear copolymers were produced, their amount would clearly be too small to lead to a significant modulus increase. Therefore, the observed modulus increases could be attributed to i) a densification of the amorphous phase of the blends upon blending that should led to positive deviation in the modulus,24–26 or ii) an increased orientation of the blends as compared to that of the pure components 25,27…”

Section: Resultssupporting

confidence: 75%

Preparation of Poly(ethylene terephthalate)/Poly(amino ether) Blends by means of the Addition of Poly(butylene terephthalate)

Granado¹,

Eguiazábal²,

Nazábal³

2004

Macro Materials & Eng

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Summary: Blends based on poly(ethylene terephthalate), PET, with poly(amino ether) (PAE) contents up to 40% were obtained by the addition of 20% poly(butylene terephthalate) (PBT) to the PET matrix. PBT mixed with PET led to a decrease in the Tm of the matrix that was enough to produce homogeneous blends by mixing in the melt state. Despite the presence of a single peak observed by dynamic‐mechanical analysis, the blends were biphasic, with amorphous phases in which minor amounts of the other component, both reacted and mixed, were present. This presence of minor components gave a fine morphology and significant adhesion that, together with the higher orientation of PAE in the blends, produced blends with a clear synergism in the modulus of elasticity, notched impact strength similar to that of the neat components, and high ductility up to 30% PAE.Young's modulus of the PET‐PBT/PAE blends.magnified imageYoung's modulus of the PET‐PBT/PAE blends.

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Section: Resultssupporting

confidence: 75%

Preparation of Poly(ethylene terephthalate)/Poly(amino ether) Blends by means of the Addition of Poly(butylene terephthalate)

Granado¹,

Eguiazábal²,

Nazábal³

2004

Macro Materials & Eng

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“…The nature of the two phases of the blend is not clear, as an abrupt change in morphology was not observed. The phase inversion composition in a biphasic blend can be estimated from the Vicat softening temperature of the blends,34,35 as the inflexion region of the sigmoidal Vicat temperature‐composition plot indicates the phase inversion 34. For this reason the Vicat softening temperatures of the AP/PAE blends were measured and are plotted against composition in Figure 5.…”

Section: Resultsmentioning

confidence: 77%

Solid‐State Structure and Mechanical Properties of Blends of an Amorphous Polyamide and a Poly(amino‐ether) Resin

Granado

Eguiazábal

Nazábal

2004

Macro Materials & Eng

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Summary: Finely dispersed blends of an amorphous polyamide (AP) and a poly(amino‐ether) (PAE) resin were obtained by direct injection moulding. The blend components reacted slightly, mainly in PAE‐rich compositions, as seen by torque increases and FT‐IR. Both negative volumes of mixing and preferential orientation were observed in blends with very high AP contents, leading to synergisms in both the modulus of elasticity and the yield stress. In PAE‐rich blends, the effects of these two structural characteristics were negative, but the higher presence of reacted products also led to an overall synergistic modulus of elasticity. With the exception of blends very rich in PAE, in which the more extensive reactions led to brittle materials, the reactions compatibilized the blends due to the presence of small amounts of reacted copolymers, probably at the interface.Cryogenically fractured surface of the skin of the AP/PAE 80/20 w/w blend.imageCryogenically fractured surface of the skin of the AP/PAE 80/20 w/w blend.

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“…The miscibility of two components is usually discussed in terms of the appearance of either single or double T g s [29]. Figure 1 shows the DSC first heating scans for different quenched samples and the thermodynamic parameters are shown in Table 1.…”

Section: Miscibility Analysismentioning

confidence: 99%

Preparation, Morphology and Properties of Poly(Trimethylene Terephthalate)/Thermoplastic Polyester Elastomer Blends

Bai

Liu

et al. 2014

Journal of Macromolecular Science, Part B

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Poly(trimethylene terephthalate)(PTT)/thermoplastic polyester elastomer (TPEE) blends were prepared and their miscibility, crystallization and melting behaviors, phase morphology, dynamic mechanical behavior, rheology behavior, spherulites morphology and mechanical properties were investigated by differential scanning calorimetry (DSC), scanning electron microscopy (SEM), dynamic mechanical analysis (DMA), parallel-plate rotational rheometry, polarized optical microscopy (POM), wide angle X-ray diffraction (WAXD), universal tensile tester and impact tester, respectively. The results suggested that PTT and TPEE were partially miscible in the amorphous state, the TPEE rich phase was dispersed uniformly in the solid matrix with a size smaller than 2  m, and the glass transition temperatures of the blends decreased with increasing TPEE content. The TPEE component had a good effect on toughening the PTT without depressing the tensile strength. The blends had improved melt viscosities for processing. When the blends crystallized from the melt state, the onset crystallization temperature decreased, but they had a faster crystallization rate at low temperatures. All the blends' melts exhibited a predominantly viscous behavior rather than an elastic behavior, but the melt elasticity increased with increasing TPEE content. When the blends crystallized from the melt, the PTT component could form spherulites but their morphology was imperfect with a small size. The blends had larger storage moduli at low temperatures than that of pure PTT.

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Partially miscible blends based on a polyarylate and poly(trimethylene terephthalate)

Cited by 25 publications

References 21 publications

Preparation of Poly(ethylene terephthalate)/Poly(amino ether) Blends by means of the Addition of Poly(butylene terephthalate)

Preparation of Poly(ethylene terephthalate)/Poly(amino ether) Blends by means of the Addition of Poly(butylene terephthalate)

Solid‐State Structure and Mechanical Properties of Blends of an Amorphous Polyamide and a Poly(amino‐ether) Resin

Preparation, Morphology and Properties of Poly(Trimethylene Terephthalate)/Thermoplastic Polyester Elastomer Blends

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