Melt rheology of compatibilized polystyrene/low density polyethylene blends

Xu, Shiai; Zhu, Lei; Xie, Jingwei; Jiang, Ming

doi:10.1002/(sici)1097-0126(199911)48:11<1113::aid-pi272>3.0.co;2-e

Cited by 14 publications

(10 citation statements)

References 14 publications

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“…6(c)], with numerous ESI particle included in PS phase. Similar structure is also observed in other PS‐rich PS/PE blends 14, 27. Further increasing the LDPE content from 50 to 80 wt %, the interlocking structure changed into matrix droplet structure.…”

Section: Resultssupporting

confidence: 79%

“…Although the fracture surfaces still changed from matrix‐droplet, interlocking and again to matrix‐droplet structure, the introduction of ESI leads to finer phase dispersion in LDPE‐rich blends. The observed fracture development is similar to that of PS/LDPE/SEBS blends when increasing the content of LDPE 27…”

Section: Resultssupporting

confidence: 64%

“…However, to our best knowledge, there are few attempts on the study of PS/LDPE/SEBS blends. Jiang et al27–29 realized a combination of toughness of LDPE and rigidity of PS by the use of SEBS. Herein, we examined the compatibilization effect of ESI and SEBS on PS/LDPE (50/50) blends by gradually increasing their content from 2.5 to 20 wt %.…”

Section: Resultsmentioning

confidence: 99%

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The compatibilization effect of ethylene/styrene interpolymer on polystyrene/polyethylene blends

Tang¹,

Tang²,

Yuan³

et al. 2007

J Polym Sci B Polym Phys

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In this study, ethylene/styrene interpolymer (ESI) was used as compatibilizer for the blends of polystyrene (PS) and low-density polyethylene (LDPE). The mechanical properties including impact, tensile properties, and morphology of the blends were investigated by means of uniaxial tension, instrumented falling-weight impact measurements, and scanning electron microscopy. Impact measurements indicated that the impact strength of the blends increases slowly with LDPE content up to 40 wt %; thereafter, it increases sharply with increasing LDPE content. The impact energy of the LDPE-rich blends exceeded that of pure LDPE, implying that the LDPE polymer can be further toughened by the incorporation of brittle PS minor phase in the presence of ESI. Tensile tests showed that the yield strength of the PS/ LDPE/ESI blends decreases considerably with increasing LDPE content. However, the elongation at break of the blends tended to increase significantly with increasing LDPE content. The compatibilization efficiency of ESI and polystyrene-hydrogenated butadiene-polystyrene triblock copolymers (SEBS) for PS/LDPE 50/50 was further compared. Mechanical properties show that ESI is more effective to achieve a combination of LDPE toughness and PS rigidity than SEBS. The correlation between the impact property and morphology of the ESI-compatibilized PS/LDPE blends is discussed. The excellent tensile ductility of the LDPE-rich blends resulted from shield yielding of the matrix. V

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Section: Resultssupporting

confidence: 79%

Section: Resultssupporting

confidence: 64%

See 1 more Smart Citation

The compatibilization effect of ethylene/styrene interpolymer on polystyrene/polyethylene blends

Tang¹,

Tang²,

Yuan³

et al. 2007

J Polym Sci B Polym Phys

View full text Add to dashboard Cite

show abstract

“…Most of attempts performed to date address the rheological behavior of immiscible blends. [1][2][3][4][5][6][7][8] In such systems, a more stabilized morphology with finer dispersed phase can be obtained by reducing interfacial tension via inducing an insitu reaction between blend components [9] or introducing a third component as a compatibilizer to the system, which can be a copolymer. [10][11][12][13][14][15][16][17][18][19][20] In a polymer blend compatibilized by a copolymer, the compatibilizer resides along the interface and interacts with blend constituents leading to an interphase with broader thickness and confined chain mobility in the system, which consequently leads to an increase of the blend viscosity.…”

Section: Introductionmentioning

confidence: 71%

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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“…Tri‐block copolymers have sparked much interest and their potential has been realized in many areas. These block copolymers have been used as thermoplastic elastomer,23 adhesives,24 hot‐melt adhesives,25 blend compatibilizers,26 membranes,27 drug delivery polymers,28 and biodegradable polymers 29. Synthesis of polyurethane‐polyvinyl multiblock copolymers through polyurethane‐based iniferters30, 31 were reported already and it was found that these block copolymers have been synthesized through CRP mechanism.…”

Section: Introductionmentioning

confidence: 99%

Novel poly(methyl methacrylate)‐block‐polyurethane‐block‐poly(methyl methacrylate) tri‐block copolymers through atom transfer radical polymerization

Kannan

Verma

Jang

et al. 2008

J of Applied Polymer Sci

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Poly(methyl methacrylate)-block-polyurethane-block-poly(methyl methacrylate) tri-block copolymers have been synthesized successfully through atom transfer radical polymerization of methyl methacrylate using telechelic bromo-terminated polyurethane/CuBr/ N,N,N,N 00 ,N 00 -pentamethyldiethylenetriamine initiating system. As the time increases, the number-average molecular weight increases linearly from 6400 to 37,000. This shows that the poly methyl methacrylate blocks were attached to polyurethane block. As the polymerization time increases, both conversion and molecular weight increased and the molecular weight increases linearly with increasing conversion. These results indicate that the formation of the triblock copolymers was through atom transfer radical polymerization mechanism. Proton nuclear magnetic resonance spectral results of the triblock copolymers show that the molar ratio between polyurethane and poly (methyl methacrylate) blocks is in the range of 1 : 16.3 to 1 : 449.4. Differential scanning calorimetry results show T g of the soft segment at 2358C and T g of the hard segment at 758C.

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Melt rheology of compatibilized polystyrene/low density polyethylene blends

Cited by 14 publications

References 14 publications

The compatibilization effect of ethylene/styrene interpolymer on polystyrene/polyethylene blends

The compatibilization effect of ethylene/styrene interpolymer on polystyrene/polyethylene blends

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

Novel poly(methyl methacrylate)‐block‐polyurethane‐block‐poly(methyl methacrylate) tri‐block copolymers through atom transfer radical polymerization

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