Morphology monitoring of PE/PBT blends by reactive processing

Pesneau, I.; Cassagnau, P.; Michel, Alain

doi:10.1002/app.2219

Cited by 20 publications

(12 citation statements)

References 28 publications

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“…Effect of reactive compatibilisation on the morphology, [13][14][15][16][17][18][19][20] mechanical, [21][22][23][24][25][26] crystallization, 27 rheological, 28 -30 dynamic mechanical, 31 and barrier 32,33 properties were reported extensively in literature. George et al 13 have reported that maleic anhydride (MA) containing compatibiliser improved the 'interfacial condition' and, thereby, reduced the dispersed phase size and provided more uniform particle size distribution.…”

Section: Introductionmentioning

confidence: 99%

Effect of reactive compatibilisation on the phase morphology and tensile properties of PA12/PP blends

Jose¹,

Nair²,

Thomas³

et al. 2005

J of Applied Polymer Sci

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Both uncompatibilized and compatibilized blends based on polyamide 12 (PA12) and isotactic polypropylene (PP) were prepared in a Brabender Plastograph®. The compatibiliser used was maleic anhydride functionalized polypropylene (PP-g-MA). Phase morphology of the blends was inspected in scanning electron microscope (SEM) on cryogenically fractured etched surfaces of the specimens. PA12/PP blends possessed a nonuniform and unstable morphology owing to the incompatibility between their constituents. Addition of compatibiliser improved the interfacial characteristics of the blends by retarding the rate of coalescence. So, the phase morphology became more fine, uniform, and stable. Tensile properties of both uncompatibilized and compatibilized blends were measured as a function of blend composition and compatibiliser concentration. Uncompatibilized blends displayed inferior mechanical properties to compatibilized ones; especially for those containing 40 -60 wt % of PP. Reactive compatibilisation of blends was found to be efficient and improved the tensile strength of the blends considerably. Addition of PP-g-MA improved the interfacial adhesion, decreased the interfacial tension, and thereby, enhanced the tensile strength by 85%. Finally, various models were adopted to describe the tensile strength of the blends. The experimental data exhibited a reasonably good fit with Nielsen's first power law model.

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Section: Introductionmentioning

confidence: 99%

Effect of reactive compatibilisation on the phase morphology and tensile properties of PA12/PP blends

Jose¹,

Nair²,

Thomas³

et al. 2005

J of Applied Polymer Sci

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“…On the other hand, the acrylic acid moieties enhance the polarity of the EAA, and thus result in its compatibilization with the PETG. 20 Therefore, after incorporating the EAA into the HDPE/PETG blends, the EAA played the role of a bridge between the HDPE matrix and the PETG domains so as to improve their interfacial adhesion, and made the PETG-rich domains to be drawn into continuous laminar structures by the HDPE matrix much better than that in the absence of the EAA.…”

Section: Effect Of Eaa On Morphologymentioning

confidence: 99%

“…In addition, it is known that strong intermolecular interaction between the PETG and the EAA was reported in the literature. 20 These miscibility and strong intermolecular interaction may be responsible for the positive deviation in the melt viscosity of the ternary blends. …”

Section: Rheological Propertiesmentioning

confidence: 99%

Preparation, morphology, and properties of multilamellar barrier materials based on blends of high‐density polyethylene and copolyester

Cui

Wang

2006

J of Applied Polymer Sci

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ABSTRACT:The multilamellar barrier materials based on the blends of high-density polyethylene (HDPE) and copolyester (PETG) were prepared via melt extrusion, and poly-(ethylene-co-acrylic acid) (EAA) as a compatibilizer was incorporated into the blends. A systematic investigation was carried out, with regard to morphology and properties. Scanning electron microscopy observation displayed the laminar morphology for the blends with the whole compositions, and the thinner laminas of the PETG phase formed in the HDPE matrix by incorporating EAA into the blends. In addition, the number and the size of the laminas of the dispersed phases were also dependant on the die temperature and screw speed, respectively. Evaluation of the mechanical properties demonstrated that incorporation of the EAA resulted in an improvement of the mechanical properties. These behaviors are attributed mainly to better adhesion and compatibility between HDPE and PETG, which has been confirmed by thermal analysis and the rheological properties. On the basis of these premises, it is reasonable to suggest that the improved barrier properties of the ternary blends with increasing concentration of the EAA be attributed to both the increase in the number of the laminas of the PETG and the decrease in their thickness, which prohibits the organic solvent molecules from entering into and permeating through the amorphous regions of the blends.

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“…Poly (butylene terephthalate) (PBT) sees wide application in such industries as automobile, electrical and electronics, and limited application for its poor low-temperature impact toughness and big notch sensitivity at room temperature [1][2][3][4] . These days, rubber (elastomer) and inorganic fibers are added together into the polymer to form the three-phase compound system, with a view to gain the high-performance low-cost compound material with the increased strength and toughness.…”

Section: Introductionmentioning

confidence: 99%