Fast in situ copolymerization of PET/PEN blends by ultrasonically-aided extrusion

Gunes, Kaan; Isayev, A. I.; Li, Xiaopeng; Wesdemiotis, Chrys

doi:10.1016/j.polymer.2010.01.013

Cited by 29 publications

(25 citation statements)

References 20 publications

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“…Wagner, with coworkers from our laboratory, 14 reported that PET/PEN blends in which the PEN concentration was equal to or less than 30 wt % showed a phase-separation phenomenon, which was investigated by dynamic rheology experiments. In this study, DMA was used to measure the physical properties of the glass-transition region.…”

Section: Dynamic Mechanical Propertiesmentioning

confidence: 99%

“…The extent of transesterification should be closely related to the processing parameters, such as the melt-mixing time. 14 As is known, the melt-mixing technique is commonly used to prepare polymer blends. Thus, from the processing and application points of view, the influence of the melt-mixing time on the structural and morphological characteristics may provide some useful guidance for optimizing the final properties of this blend material.…”

Section: Introductionmentioning

confidence: 99%

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Influence of the mixing time on the phase structure and glass‐transition behavior of poly(ethylene terephthalate)/poly(ethylene‐2,6‐naphthalate) blends

Wang

Chen

et al. 2013

J of Applied Polymer Sci

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Blends of poly(ethylene terephthalate) and poly(ethylene-2,6-naphthalate) (70 : 30 w/w) were prepared via a melt-mixing process at 280 C with various mixing times. The melt-mixed blends were analyzed by magnetic resonance spectroscopy, differential scanning calorimetry, dynamic mechanical measurements, transmission electron microscopy, and tensile tests. The results indicate that the blends mixed for short times had lower extents of transesterification and were miscible to a limited extent. The blends initially show two glass transitions, which approached more closely and merged gradually with increasing mixing time. A mechanical model was used to help understand the glass-transition behavior. With increasing mixing time, the phase structure of the blends improved, and this led to an increase in the tensile strength.

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Section: Dynamic Mechanical Propertiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Influence of the mixing time on the phase structure and glass‐transition behavior of poly(ethylene terephthalate)/poly(ethylene‐2,6‐naphthalate) blends

Wang

Chen

et al. 2013

J of Applied Polymer Sci

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“…5 Many studies on devulcanization were reviewed in the book chapter. 6 Later, ultrasonically aided processing was used to prepare various polymer blends, including high-density polyethylene (HDPE)/polystyrene (PS), 7,8 polypropylene (PP)/PS, 9 PP/ethylene propylene diene methylene (EPDM) rubber, [10][11][12][13][14][15][16] PP/natural rubber (NR), 10,11,17 HDPE/NR, 10,11 HDPE/ EPDM, 10,11 HDPE/styrene butadiene rubber (SBR), 10,11 NR/SBR, 10,11 PP/ultrahighmolecular weight polyethylene, 18 linear low-density polyethylene (LLDPE)/lowdensity polyethylene, 19,20 HDPE/polyamide 6 (PA6), 21 PS/EPDM, 22,23 PP/PA6, 24 poly(lactic acid)/poly(butylene adipate-co-terephthalate), 25 ethylene-a-olefin copolymers (POE)/PS, 26 PA6/POE/POE grafted with maleic anhydride (POE-g-MAH), 27 LLDPE/POE, 28 polyethylene terephthalate (PET)/LCP, 29 polyethylene naphthalate (PEN)/liquid crystalline polymers (LCP), 30 PET/PEN, 31 blends of two different LCPs. 32 Most articles reported the in situ copolymerization of polymers by the ultrasonic treatment, as patented by Isayev and Hong.…”

Section: Introductionmentioning

confidence: 99%

Natural rubber/styrene butadiene rubber blends prepared by ultrasonically aided extrusion

Choi

Isayev

2013

Journal of Elastomers & Plastics

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Ultrasonically aided extrusion of natural rubber (NR), styrene butadiene rubber (SBR), and NR/SBR blends with ratio of 70/30, 50/50, and 30/70 were carried out at various ultrasonic amplitudes up to 10 mm. A die pressure of NR and NR/SBR blends continuously decreased with increase of ultrasonic amplitude, while that of SBR showed a slight increase with increase in amplitude from 5.0 to 7.5 mm due to a dominant effect of SBR gel formation. Complex dynamic viscosity, minimum and maximum torque of curing curves of NR, SBR, and NR/SBR blends, and cross-link density and gel fraction of their vulcanizates were decreased by the ultrasonic treatment at an amplitude of 10 mm, due to the molecular chain scission. The latter also led to a decrease in the hardness, modulus at a strain of 100%, and abrasion resistance of NR and NR/SBR blends. However, the modulus and abrasion resistance of SBR showed an improvement at amplitude of 7.5 mm, due to a dominant effect of gel formation. Both the tensile strength and elongation at break of ultrasonically treated NR/SBR blends showed a maximum at amplitude of 5.0 mm, with the modulus at a strain of 100% not being affected. Morphological studies using the phasecontrast optical microscope and atomic force microscopy showed a reduction in the size of rubber phases and a better homogeneity of NR/SBR blend by the ultrasonic treatment at amplitude of 5.0 mm. Accordingly, the increase in both the tensile strength and elongation at break of ultrasonically treated NR/SBR blends at an amplitude of 5.0 mm is mainly ascribed to the lower size of rubber phases and improved uniformity of blend caused by the ultrasonic treatment.

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“…The effects depend strongly on chemical structures consisting blend and ultrasonic amplitude irradiated. High intensity ultrasound effect was reported to enhance compatibility at short irradiation time in polymer blends [20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Properties of ultrasound-assisted blends of poly(ethylene terephthalate) with polycarbonate

Hong

Lee

2013

Journal of Industrial and Engineering Chemistry

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Fast in situ copolymerization of PET/PEN blends by ultrasonically-aided extrusion

Cited by 29 publications

References 20 publications

Influence of the mixing time on the phase structure and glass‐transition behavior of poly(ethylene terephthalate)/poly(ethylene‐2,6‐naphthalate) blends

Influence of the mixing time on the phase structure and glass‐transition behavior of poly(ethylene terephthalate)/poly(ethylene‐2,6‐naphthalate) blends

Natural rubber/styrene butadiene rubber blends prepared by ultrasonically aided extrusion

Properties of ultrasound-assisted blends of poly(ethylene terephthalate) with polycarbonate

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