Synergistic mechanical behaviour and improved processability of poly(ether imide) by blending with poly(trimethylene terephthalate)

Ramiro, J.; Eguiazábal, J. I.; Nazábal, J.

doi:10.1002/pat.340

Cited by 44 publications

(44 citation statements)

References 38 publications

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“…20,42,43 For instance, in PC/PA6 blends with a globular morphology negative 18 or lineal 20 modulus were observed, while modulus increases of 12% were obtained when fibers were present. 20 Therefore, to explain the synergistic behavior of the modulus of elasticity, the crystallinity of PA6,6, the free volume of the amorphous phase of the blends and the orientation of the blends were measured and compared with those of the neat components.…”

Section: Mechanical Propertiesmentioning

confidence: 85%

“…This decrease is significant, occurs as the modulus increases in all the compositions, and has led to clear modulus increases in other blends. 42,[44][45][46] The orientation of the blends was studied by means of birefringence measurements and the results are shown in Figure 7. As can be seen, with the exception of the 75/25 composition, the birefringence and consequently the matrix orientation, was smaller in the blends than in the neat components.…”

Section: Mechanical Propertiesmentioning

confidence: 99%

See 1 more Smart Citation

Compatible polycarbonate/polyamide 6,6 blends with fibrillar morphology

Granado¹,

Eguiazábal²,

Nazábal³

2011

J of Applied Polymer Sci

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Blends of bisphenol A polycarbonate (PC) and polyamide 6,6 (PA6,6) were prepared directly during the plasticization step of an injection molding process in an attempt to attain both (i) the reinforcement of the blends through fibrillar morphology, and (ii) an adequate compatibilization despite the short processing procedure used. Differential scanning calorimetry and dynamic-mechanical analysis indicated that the blends were made up of a PC-rich phase where some PA6,6 was present and, ruling out a possible degradation, of an almost pure PA6,6-phase. The cryogenically fractured surfaces observed by scanning electron microscopy showed both rather fine particles and larger particles with occluded subparticles. This complex morphology indicates low interphase tension and, therefore, compatibilization, which can be attributed to the presence of PA6,6 in the two phases of the blends. The values of Young's modulus, determined by means of tensile tests, were always synergistic and, in the case of the 25/75 blend, the modulus was even higher than those of any of the two pure components. It appears this could be due to both the highly fibrillar morphology of the dispersed phase, and the significant decrease observed in specific volume. The blends remained ductile throughout the full composition range, which also indicates compatibilization.

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Section: Mechanical Propertiesmentioning

confidence: 85%

Section: Mechanical Propertiesmentioning

confidence: 99%

Compatible polycarbonate/polyamide 6,6 blends with fibrillar morphology

Granado¹,

Eguiazábal²,

Nazábal³

2011

J of Applied Polymer Sci

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“…Thus, the measured P will provide a parameter directly related to h and will characterize the processability of the blends. [10] It has been shown [4] that P provides processability estimations similar to those of torque measurements obtained in a discontinuous kneader.…”

Section: Processabilitymentioning

confidence: 99%

“…[4][5][6] Many studies on PEI based blends have been carried out to ameliorate the global performance of the end products. Thus, studied miscible blends of PEI include those with poly(ether ether ketone) (PEEK), [7][8][9] poly(butylene terephthalate) (PBT), [4,5] poly(trimethylene terephthalate) (PTT), [10] poly(ethylene naphthalate) (PEN), [11] poly(butylene naphthalate) [12] and polyphenylsulfone. [13] Blends with poly(ethylene terephthalate) (PET), [14][15][16] polycarbonate of bisphenol A, [17] polyarylate, [18] an amorphous polyamide [19] and polysulfone of bisphenol A (PSU) [20] are partially miscible.…”

Section: Introductionmentioning

confidence: 99%

Processability, Structure and Mechanical Properties of Poly(ether imide)/Amorphous Copolyester Blends

Granado¹,

Eguiazábal²,

Nazábal³

2010

Macro Materials & Eng

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Blends of PEI with an amorphous copolyester (PCTG) were obtained by melt‐mixing followed by injection molding. The processability of PEI increased several times upon addition of just 10% PCTG, thus expanding the applications of PEI. All the blends showed a single Tg and most of them were transparent. However, they were biphasic as suggested by the widening of the Tg's and proved by SEM. A fine dispersed particle size and good adhesion level were also observed by SEM. The values of the modulus of elasticity and the yield stress appeared close the additivity rule, and were attributed to the combined effects of the density increase and orientation decrease in the blends. These morphological changes had a slightly negative influence on ductility which was nevertheless high.

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“…Moreover, it combines the two key advantages of PET and PBT into one polymer, and it has important applications in the textile industry 2 and is a promising engineering thermoplastic. 3 Poly(ethylene 2,6-naphthalate) (PEN), featuring a molecular structure of a naphthalene ring instead of the benzene ring in PET, is used as a highperformance polymer and has superior strength, heat stability, and barrier properties because of its increased chain stiffness. 4 Thus, PEN is used in a variety of applications, such as tire cords for automobiles 5 and base films for videotapes.…”

Section: Introductionmentioning

confidence: 99%

Isothermal‐crystallization kinetics and melting behavior of crystalline/crystalline blends of poly(trimethylene terephthalate) and poly(ethylene 2,6‐naphthalate)

Run

Wang

Yao

et al. 2006

J of Applied Polymer Sci

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ABSTRACT:The isothermal crystallization and crystal morphology of poly(trimethylene terephthalate) (PTT)/poly (ethylene 2,6-naphthalate) (PEN) blends were investigated with differential scanning calorimetry and polarized optical microscopy. The commonly used Avrami equation was used to fit the primary stage of isothermal crystallization. The Avrami exponents were evaluated to be in the range of 3.0-3.3 for isothermal crystallization. The subsequent melting endotherms of the blends after isothermal crystallization showed multiple melting peaks. The crystallization activation energies of the blends with 20 or 40% PTT was À48.3 and À60.9 kJ/mol, respectively, as calculated by the Arrhenius formula for the isothermal-crystallization processes.The Hoffman-Lauritzen theory was also employed to fit the process of isothermal crystallization, and the kinetic parameters of the blends with 20 or 40% PTT were determined to be 1.5 Â 10 5 and 1.8 Â 10 5 K 2 , respectively. The spherulite morphology of the six binary blends formed at 1908C showed different sizes and perfect Maltese crosses when the PTT or PEN component was varied, suggesting that the greater the PTT content was, the larger or more perfect the crystallites were that formed in the binary blends.

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Synergistic mechanical behaviour and improved processability of poly(ether imide) by blending with poly(trimethylene terephthalate)

Cited by 44 publications

References 38 publications

Compatible polycarbonate/polyamide 6,6 blends with fibrillar morphology

Compatible polycarbonate/polyamide 6,6 blends with fibrillar morphology

Processability, Structure and Mechanical Properties of Poly(ether imide)/Amorphous Copolyester Blends

Isothermal‐crystallization kinetics and melting behavior of crystalline/crystalline blends of poly(trimethylene terephthalate) and poly(ethylene 2,6‐naphthalate)

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