Immiscible Blends of PC and PET, Current Knowledge and New Results: Rheological Properties

Carrot, Christian; Mbarek, Souad; Jaziri, Mohamed; Chalamet, Yvan; Raveyre, Claude; Prochazka, Frédéric

doi:10.1002/mame.200700006

Cited by 51 publications

(39 citation statements)

References 60 publications

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“…Isothermal plots of versus v for the increasing concentration of the dispersed phase show a progressive increase of in the terminal zone [333][334][335]. In some cases the increase becomes significant for concentrations just above the percolation threshold.…”

Section: Blend Elasticitymentioning

confidence: 90%

Rheology of Polymer Blends

Utracki

2011

Encyclopedia of Polymer Blends

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The first polymer blend was patented in 1846 and since then blends have became ubiquitous. Blending may provide a full set of material properties, improving processability and/or specific properties. With the advancement of technology there is the notorious growth of complexity -while in the beginning blending involved two polymers, initially without a compatibilizer, more recent commercial alloys have up to five polymers, three compatibilizers, and frequently are reinforced with macro-or nanoparticles [1].Blends are classified as either thermodynamically miscible or immiscible, with the latter dominating. However, imposition of a flow affects the thermodynamic equi librium and it may enhance the miscibility of immiscible blends or vice-versa -there is an interrelation between rheology and thermodynamics. Similarly, flow affects the degree of deformation of the dispersed phase, thus in immiscible blends there are other interrelations between rheology and morphology, which affect the blend performance. To the complexity of polymer alloys and blends (PAB) behavior one must add the incorporation of solids, either in the form of filler and nanofiller particles or by simple fact of blending two components with widely different transition temperatures.Since the flow of PAB is complex, it is useful to revert to simple models, for example, for miscible blends to solutions or mixtures of polymer fractions, for immiscible blends to emulsions or suspensions, and for compatibilized blends to block copolymers (Table 2.1). It is also advisable to study flow behavior of multiphase systems at constant stress (not at constant deformation rate) [2,3].For miscible blends, the free volume theory predicts a positive deviation from the log-additivity rule (PDB, positively deviating blend). However, depending on the system and method of preparation, these blends may show a positive deviation, negative deviation, or additivity [4]. Upon mixing, the presence of specific interac tions may change the free volume and degree of entanglement, which in turn affect the flow behavior [5,6]. For immiscible blends the flow is similarly affected, but in addition there are at least three contributing phases: of the polymeric matrix, of the First Edition. Edited by Avraam I. Isayev.

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Section: Blend Elasticitymentioning

confidence: 90%

Rheology of Polymer Blends

Utracki

2011

Encyclopedia of Polymer Blends

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“…The temperature was raised from 160 to 260°C at 10°C/min and leveled off at 260°C for 5 min before analysis. A detailed description of the procedure can be found in a previous work [31].…”

Section: Rheology Of the Neat Polymersmentioning

confidence: 99%

Dispersed phase morphology and fractionated crystallization of high-density polyethylene in PET/HDPE blends

et al. 2008

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“…But the vGP plots, reflecting the occurrence of a tail of long relaxation times, can also be used to get information on the morphologies in immiscible polymers blends. Uncompatibilized PET and PC blends showed lower values of phase angle, reflecting a general increase of the elasticity in comparison to neat components. If a catalyst is added to improve the compatibility in a 50/50 blend, a shift of the maximum loss angle toward the high modulus is observed.…”

Section: Introductionmentioning

confidence: 95%

In the melt, grafting of polycarbonate onto polystyrene-block -poly(ethylene-butylene)-block -polystyrene-grafted -maleic anhydride: Reactive extrusion

et al. 2013

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The use of reactions between polycarbonate (PC) and polystyrene-block-poly(ethylene-butylene)-block-polystyrenegrafted-maleic anhydride (SEBS-g-MAH) is a convenient way to create SEBS-g-PC. Grafting was realized by reactive extrusion at three temperatures using SnOct 2 or TBD catalysts. SEC analyses showed the apparition of a double distribution when the TBD was used. The mean residence time widely increased when this catalyst was used, and the rheological curves depicted a percolation effect of the SEBS nodules in the PC matrix. No explicit evolution was found with the use of SnOct 2 . The thermal analyses showed the disappearance of the PC phase transition temperature. The Van Gurp-Palmen plots confirmed the efficiency of the TBD catalyst and that 260 C was the optimal reactive extrusion temperature.

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Immiscible Blends of PC and PET, Current Knowledge and New Results: Rheological Properties

Cited by 51 publications

References 60 publications

Rheology of Polymer Blends

Rheology of Polymer Blends

Dispersed phase morphology and fractionated crystallization of high-density polyethylene in PET/HDPE blends

In the melt, grafting of polycarbonate onto polystyrene-block -poly(ethylene-butylene)-block -polystyrene-grafted -maleic anhydride: Reactive extrusion

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