The relative role of coalescence and interfacial tension in controlling dispersed phase size reduction during the compatibilization of polyethylene terephthalate/polypropylene blends

Lepers, Jean‐Christophe; Favis, Basil D.; Tabar, R. J.

doi:10.1002/(sici)1099-0488(199710)35:14<2271::aid-polb7>3.3.co;2-s

Cited by 22 publications

(25 citation statements)

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“…It is well known that a compatibilizer can prevent coalescence and reduce the interfacial tension in the control of morphology of a blend [21,26,45]. The uniformity of particle size and the shape of the rPET phase caused by adding a compatibilizer is believed to be the result of reduction of coalescence due to steric stabilization by a compatibilizer.…”

Section: Morphologymentioning

confidence: 99%

Compatibilization of polypropylene/recycled polyethylene terephthalate blends with maleic anhydride grafted polypropylene in the presence of diallyl phthalate

et al. 2015

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Bi-functional co-agent, diallyl phthalate (DAP), −assisted melting free-radical grafting of maleic anhydride (MAH) on polypropylene (PP) is carried out by reactive extrusion. The PP/recycled polyethylene terephthalate (rPET) blends with and without PP-g-MAH/DAP (PP grafted with both MAH and DAP) are conducted on a twin-screw extruder. It reveals that the introduction of DAP can significantly enhance the grafting degree of MAH and decrease the chain scission of PP. The maximum extent of MAH grafting (1.5 wt.%) is obtained when DCP and MAH contents are 0.5 and 6.0 wt.%, respectively, and the DAP/MAH molar ratio is 0.3. Besides, differential scanning calorimetry (DSC) analysis shows that the crystallization temperature of grafted PP is higher than that of pure PP due to the nucleation of grafted groups. Fourier transform infrared spectroscopy (FTIR) analysis proves that chemical reactions take place between PP-g-MAH/DAP and rPET. In particular, scanning electron microscopy (SEM) observations demonstrate that, the PP/rPET blends compatibilized with PP-g-MAH/DAP show enhanced adhesion at the interface comparing with the binary PP/rPET blend, which is also proved by DSC measurements, dynamic mechanical analysis (DMA) and mechanical properties.

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Section: Morphologymentioning

confidence: 99%

Compatibilization of polypropylene/recycled polyethylene terephthalate blends with maleic anhydride grafted polypropylene in the presence of diallyl phthalate

et al. 2015

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“…Particle-particle coalescence was demonstrated to play an important role in the size of the dispersed phase. [39] When increasing the PET concentration, coalescence becomes drastic, giving rise to formation of larger particle. In particular, when melt drawing is carried out for the material, a significant potential exists for particle-particle interaction and coalescence since the width and thickness of the tapes are continuously reduced during the drawing process.…”

Section: Resultsmentioning

confidence: 99%

Essential Work of Fracture Parameters of in‐situ Microfibrillar Poly(ethylene terephthalate)/Polyethylene Blend: Influences of Blend Composition

Li¹,

Yang²,

Huang³

et al. 2004

Macro Materials & Eng

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Summary: An in‐situ microfibrillar blend based on poly(ethylene terephthalate) (PET) and polyethylene (PE) was fabricated through slit die extrusion, hot‐stretching and quenching. The morphology of the PET in‐situ microfibers, which were observed after the matrix was etched away, appears to be dependent on the blend composition at a fixed hot stretch ratio. The well‐defined in‐situ fibers were generated at the PET concentrations ranging from 15 to 25 wt.‐%. The fracture toughness of the microfibrillar blend was evaluated using deeply double‐edge notched tension (DDENT) specimens according to the essential work of fracture procedure. Initially, the increase of PET concentration makes we rise. At 15 wt.‐% of PET concentration there exists a maximum we. Further increase of PET microfibers causes a rapid decrease of we. On the other hand, incorporation of PET microfibers at a low concentration to PE makes wp rise slightly. As it exceeds 10 wt.‐%, wp decreases substantially. It was believed that the characteristics of the PET microfibers were responsible for the fracture behaviors of the microfibrillar blend.

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“…[32] As a result, the toughness is prominently improved as shown in Table 3. When EPDM content reaches 21 wt.-%, the notched Charpy impact strength reaches a maximum value of 26.3 kJ/m 2 , 20-fold comparing to 1.29 kJ/m 2 of pure PS.…”

Section: Mechanical Properties Of Ps/epdm and Ps/epdm/sbs Blendsmentioning

confidence: 95%

Toughening of Polystyrene with Ethylene‐Propylene‐Diene Terpolymer (EPDM) Compatibilized by Styrene‐Butadiene‐Styrene Block Copolymer (SBS)

Fang¹,

Guo²,

Zha³

2004

Macro Materials & Eng

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Summary: Polystyrene (PS) was toughened with ethylene‐propylene‐diene terpolymer (EPDM) in the presence of styrene‐butadiene‐styrene block copolymer (SBS). Incorporation of SBS into the PS/EPDM blends clearly improved the impact properties. For PS/EPDM/SBS (mass ratio: 69/21/10) blends, the notched Charpy impact strength reached a maximum value of 26.3 kJ/m2. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) showed that SBS was distributed on the interface between PS and EPDM. Butanone extraction and FTIR analysis found that there was a grafting reaction between PS and EPDM phase during melt compounding. Shearing and processing rheological behaviors of blends were evaluated with a Haake capillary rheometer and a torque rheometer, respectively. magnified image

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The relative role of coalescence and interfacial tension in controlling dispersed phase size reduction during the compatibilization of polyethylene terephthalate/polypropylene blends

Cited by 22 publications

References 0 publications

Compatibilization of polypropylene/recycled polyethylene terephthalate blends with maleic anhydride grafted polypropylene in the presence of diallyl phthalate

Compatibilization of polypropylene/recycled polyethylene terephthalate blends with maleic anhydride grafted polypropylene in the presence of diallyl phthalate

Essential Work of Fracture Parameters of in‐situ Microfibrillar Poly(ethylene terephthalate)/Polyethylene Blend: Influences of Blend Composition

Toughening of Polystyrene with Ethylene‐Propylene‐Diene Terpolymer (EPDM) Compatibilized by Styrene‐Butadiene‐Styrene Block Copolymer (SBS)

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