A linear viscoelastic model of matrix/core-shell modifier polymer blends

Choi, Joong-Keun; Ryu, Jong-Hoon; Kim, Sang Yong

doi:10.1002/(sici)1099-0488(20000401)38:7<942::aid-polb5>3.0.co;2-n

Cited by 12 publications

(10 citation statements)

References 20 publications

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“…In other words, these results were in good agreement with aggregates or agglomerate structure development resulting from core‐shell type morphology in these ternary blend samples. A similar behavior was reported for a 50/50 matrix/core‐shell type modifier polymer blend consisting of PBA as core that is grafted with PMMA shell dispersed in PMMA matrix by Choi et al28 who attributed their results to strong interfacial adhesion as a result of trapping the matrix chains in the shell and resulting interconnectivity of the dispersed particles. However, this explanation could not be applied to our sample that had agglomerate microstructure.…”

Section: Resultssupporting

confidence: 78%

“…As it can be seen in Figure 6, the ternary blend sample exhibit a distinct positive deviation from Palierne model. Moreover, the frequency range, below which the elastic response of our ternary blend samples begins, is much higher than those reported for binary blends 27, 28. Therefore, the enhanced low frequency elastic response of this ternary blend sample can be attributed to core‐shell morphology and resulting aggregates formed in this sample.…”

Section: Resultsmentioning

confidence: 60%

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Study on morphology and viscoelastic properties of PP/PET/SEBS ternary blend and their fibers

Mostofi¹,

Nazockdast²,

Mohammadigoushki³

2009

J of Applied Polymer Sci

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The morphology development of polypropylene (PP)/polyethylene terephthalate (PET)/styrene-ethylenebutylene-styrene (SEBS) ternary blends and their fibers were studied by means of scanning electron microscopy (SEM) in conjunction with the melt linear viscoelastic measurements. The morphology of the blends was also predicted by using Harkin's spreading coefficient approach. The samples varying in composition with PP as the major phase and PET and SEBS as the minor phases were considered. Although SEM of the binary blends showed matrix-dispersed type morphology, the ternary blend samples exhibited a morphological feature in which the dispersed phase formed aggregates consisting of both PET and SEBS particles distributed in the PP matrix. The SEM of the blend samples containing 30 and 40 wt % of total dispersed phase showed an agglomerated structure formed between the aggregates. The SEM of the PP/PET binary fiber blends showed long well-oriented microfibrils of PET whereas in the ternary blends, the microfibrils were found to have lower aspect ratio with a fraction of the SEBS stuck on the microfibril fracture surfaces. These results were attributed to a core-shell type morphology in which the PET and SEBS formed the core-shells distributed in the matrix. The melt viscoelastic behavior of the ternary blends containing less than 30 wt % of the total dispersed phase was found to be similar to the matrix and binary blend samples whereas the samples containing 30 and 40 wt % of dispersed phases exhibited a pronounced viscosity upturn and nonterminal storage modulus in low frequency range. These results were found to be in good agreement with the morphological results.

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Section: Resultssupporting

confidence: 78%

Section: Resultsmentioning

confidence: 60%

Study on morphology and viscoelastic properties of PP/PET/SEBS ternary blend and their fibers

Mostofi¹,

Nazockdast²,

Mohammadigoushki³

2009

J of Applied Polymer Sci

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“…Consequently, the interconnectivity of the dispersed phase domains of the compatibilized blends with PTW can be considered as the cause of the observed solid like rheological behavior. This type of rheological behavior originating from such microstructure was also reported by Choi et al for the PMMA/poly(butyl acrylate) (PBA) core/shell blends consisting of grafted cores of PBA surrounded by a PMMA shell 32…”

Section: Discussionsupporting

confidence: 74%

“… A schematic of the chemical reaction between Maleic anhydride groups of PP‐ g ‐MAH chains and hydroxyl end groups of PET chains 32…”

Section: Discussionmentioning

confidence: 99%

Influence of Interfacial Activity and Micelle Formation on Rheological Behavior and Microstructure of Reactively Compatibilized PP/PET Blends

Entezam

Khonakdar

Yousefi

et al. 2011

Macro Materials & Eng

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Dynamic and start‐up shear flow experiments along with SEM analysis are described for a PP/PET blend compatibilized by two reactive compatibilizers with different interfacial activity and rheological characteristics. The linear viscoelastic behavior of the blends is discussed using Palierne and fractional Zener models (FZMs). The nonzero value of Ge, the elastic modulus of spring element of FZM, is explained by the network‐like structure of the blends attributed to the interconnectivity between dispersed‐phase domains. Ge increases with increasing interfacial activity. Micelle formation due to extra amounts of compatibilizer in a system with higher interfacial activity leads to an increase of the elastic modulus, but to Ge = 0 in system with lower interfacial activity.

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“…Over the past two decades, great attention has been paid to the ternary blends, in particular those with core–shell type morphology . It has been demonstrated that the morphology of ternary polymer blends is predominantly controlled by the interfacial tension between the blend components, and, therefore, it can be predicted through phenomenological models …”

Section: Introductionmentioning

confidence: 99%

Role of Multiwalled Carbon Nanotubes Localization on Morphology Development of PMMA/PS/PP Ternary Blends

et al. 2015

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In this work, we studied the parameters affecting the localization of multiwalled carbon nanotubes (MWCNTs) and its impact on morphology development of poly(methyl methacrylate)/polystyrene/polypropylene (PMMA/PS/PP) ternary blends, which originally have a thermodynamically preferred core-shell type morphology. We compared the results with the morphological prediction based on the thermodynamic approach. The MWCNTs localization and morphological features of nanocomposite samples were studied by means of melt linear viscoelastic experiments together with electron microscopy results. It was found that at 0.5 wt% of MWCNTs the original core-shell type morphology of the ternary blend samples almost remained intact. and this observation was independent of the sequence of feeding. At 1 wt% of MWCNTs, the core-shell morphology was retained only for those nanocomposite samples prepared using the sequential feeding mode. In addition, it was demonstrated that the thermodynamic predictions could be utilized for the nanocomposites containing low MWCNTs contents. However, this was not true for the nanocomposites with higher MWCNTs contents due to the predominating role of viscoelastic properties of the PS shell. C 2015 Wiley Periodicals, Inc. Adv Polym Technol 2016; View this article online at wileyonlinelibrary.com.

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A linear viscoelastic model of matrix/core-shell modifier polymer blends

Cited by 12 publications

References 20 publications

Study on morphology and viscoelastic properties of PP/PET/SEBS ternary blend and their fibers

Study on morphology and viscoelastic properties of PP/PET/SEBS ternary blend and their fibers

Influence of Interfacial Activity and Micelle Formation on Rheological Behavior and Microstructure of Reactively Compatibilized PP/PET Blends

Role of Multiwalled Carbon Nanotubes Localization on Morphology Development of PMMA/PS/PP Ternary Blends

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