Correlation of morphology and rheological response of interfacially modified PTT/m-LLDPE blends with varying extent of modification

Jafari, Seyed Hassan; Yavari, A.R.; Asadinezhad, Ahmad; Khonakdar, Hossein Ali; Böhme, Frank

doi:10.1016/j.polymer.2005.04.045

Cited by 72 publications

(51 citation statements)

References 55 publications

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“…The rheological results also show that SEBS-g-MA is able to make interaction with PS and HDPE phases, resulting in an increase in the viscosity of blends. Similar results were reported by Lin et al [76] and Jafari et al [77]. Fig.…”

Section: Rheologysupporting

confidence: 91%

Investigation of compatibilization effects of SEBS-g-MA on polystyrene/polyethylene blend with a novel separation method in melted state

Dobrovszky

Ronkay

2016

Polym. Bull.

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Abstract:Preparing polymer blends is an effective way to tailor the good properties of plastics but the most commonly used polymers are incompatible with each other. Therefore, to reduce the interfacial tension and to achieve finer and stable morphology, a suitable copolymer or compatibilizer has to be added to blends in order to establish new interactions between the phases. However, it is difficult to determine the required amount of compatibilizers in polymer blends. As an outcome of the present research a novel separation method was developed, where the blends are investigated in melted state, utilising centrifugal force to determine the adequacy of compatibilizers. The effectiveness of styrene/ethylene/butylene/styrene block copolymer grafted with maleic anhydride (SEBS-g-MA) was verified by blending two immiscible plastics: polystyrene (PS) and high density polyethylene (HDPE). FTIR measurements were carried out to support the results of optical microscopy regarding the purity of separation. Comparing the results of morphology, rheology and mechanical properties with the novel separation method, it seems that investigation of compatibilization effect in a melted state would be suitable for predicting the adequacy of compatibilizer in blend. The minimum required amount of compatibilizer was also detectable, wherein the stress-strain curves begins to change significantly and the impact properties starting to improve in PS/HDPE blends.Keywords: compatibilization; polymer separation; polymer blend; centrifugal force; polymers in melted state.Acknowledgements: This research was realized in the framework of TÁMOP 4.2.4. A/1-11-1-2012-0001 "National Excellence Program -Elaborating and operating an inland student and researcher personal support system".

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Section: Rheologysupporting

confidence: 91%

Investigation of compatibilization effects of SEBS-g-MA on polystyrene/polyethylene blend with a novel separation method in melted state

Dobrovszky

Ronkay

2016

Polym. Bull.

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“…[29] Therefore, PTT has recently attracted several investigations into its characteristics either in the pure form [29][30][31][32] or blends. [33][34][35][36][37][38][39][40][41][42] Summary: Blends of poly(trimethylene terephthalate) (PTT) and polycarbonate (PC) over full composition range were prepared using a twin-screw extruder. A glycidyl methacrylate-based terpolymer was used to modify the interface of the blends.…”

Section: Introductionmentioning

confidence: 99%

Linear Viscoelastic Characteristics of Poly(trimethylene terephthalate)/Polycarbonate Blends in the Melt State

Yavari¹,

Asadinezhad²,

Jafari³

et al. 2005

Macro Materials & Eng

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Summary: Blends of poly(trimethylene terephthalate) (PTT) and polycarbonate (PC) over full composition range were prepared using a twin‐screw extruder. A glycidyl methacrylate‐based terpolymer was used to modify the interface of the blends. Morphological examinations were carried out using transmission electron microscopy (TEM) and confirmed the biphasic structure of the blends. Dynamic rheological response of the blends was recorded in the linear viscoelastic region. It was observed that addition of the terpolymer to the system increases the dynamic shear moduli and complex viscosity of the blends, which is attributed to interactions of the terpolymer at the interface of two phases leading to a restricted chain mobility of the blend components. The Veenstra model was found to be able to describe dynamic shear modulus of the PTT/PC 50/50 blend; however, for the compatibilized blend of PTT/PC 50/50, the fit is not as good as that of uncompatibilized system, which is believed to be due to formation of micelles in this system.

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“…It can be seen that a good fit between the experimental data with the Palierne model is not obtained; that is, the Palierne model fails to predict the rheological properties of the (R-PET)/SEEPS blends. This may be due to too large a difference between the complex shear modulus of the dispersed and matrix phases, which significantly decreases the contribution of (a/R) to blend complex modulus in the Palierne formula [33].…”

Section: Palierne Analysismentioning

confidence: 99%

Melt rheology and properties of compatibilized recycled poly(ethylene terephthalate)/(styrene‐ethylene‐ethylene‐propylene‐styrene) block copolymer blends

Lin

Qian

Xiao

et al. 2014

Vinyl Additive Technology

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Blends of recycled poly(ethylene terephthalate) (R-PET) and (styrene-ethylene-ethylene-propylene-styrene) block copolymer (SEEPS) compatibilized with (maleic anhydride)-grafted-styrene-ethylene-butylene-styrene (SEBS-g-MAH) were prepared by melt blending. The compatibilizing effects of SEBS-g-MAH were investigated systematically by study of the morphology, linear viscoelastic behavior, and thermal and mechanical properties of the blends. The results show that there is good agreement between the results obtained by rheological measurement and morphological analysis. The rheological test shows that the melt elasticity and melt strength of the blends increase with the addition of SEBS-g-MAH.The Cole-Cole plots and van Gurp-Palmen plots confirm the compatibilizing effect of SEBS-g-MAH. However, the Palierne model fails to predict the linear viscoelastic properties of the blends. The morphology observation shows that all blends exhibit a droplet-matrix morphology. In addition, the SEEPS particle size in the (R-PET)/SEEPS blends is significantly decreased and dispersed uniformly by the addition of SEBS-g-MAH. Differential scanning calorimeter analysis shows that the crystallization behavior of R-PET is restricted by the incorporation of SEEPS, whereas the addition of SEBS-g-MAH improves the crystallization behavior of R-PET compared with that of uncompatibilized (R-PET)/SEEPS blends. The Charpy impact strength of the blends shows the highest value at SEBS-g-MAH content of 10%, which is about 210% higher than that of pure R-PET. J. VINYL ADDIT. TECHNOL., 00:000-000,

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Correlation of morphology and rheological response of interfacially modified PTT/m-LLDPE blends with varying extent of modification

Cited by 72 publications

References 55 publications

Investigation of compatibilization effects of SEBS-g-MA on polystyrene/polyethylene blend with a novel separation method in melted state

Investigation of compatibilization effects of SEBS-g-MA on polystyrene/polyethylene blend with a novel separation method in melted state

Linear Viscoelastic Characteristics of Poly(trimethylene terephthalate)/Polycarbonate Blends in the Melt State

Melt rheology and properties of compatibilized recycled poly(ethylene terephthalate)/(styrene‐ethylene‐ethylene‐propylene‐styrene) block copolymer blends

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