Fracture behavior and deformation mechanism of polypropylene/ethylene–octene copolymer/magnesium hydroxide ternary phase composites

Yin, Jun; Zhang, Yong; Zhang, Yinxi

doi:10.1002/app.22111

Cited by 15 publications

(26 citation statements)

References 22 publications

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“…Once the debonding stress was higher than the tensile yield stress, the yielding of the matrix took place, rather than the debonding of filler particles. 35 Thus, the debonding process was hindered, leading to much lower impact strength than that of HIPS/SEBS/coated Mg(OH) 2 system.…”

Section: Fractographymentioning

confidence: 99%

Morphology and mechanical properties of high‐impact polystyrene/elastomer/magnesium hydroxide composites

Chang

Xie²,

Yang

2006

J of Applied Polymer Sci

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Ternary composites of high-impact polystyrene (HIPS), elastomer, and magnesium hydroxide filler encapsulated by polystyrene were prepared to study the relationships between their structure and mechanical properties. Two kinds of morphology were formed. Separation of elastomer and filler was found when a nonpolar poly[styrene-b-(ethylene-co-butylene)-b-styrene] triblock copolymer (SEBS) was incorporated. Encapsulation of filler by elastomer was achieved by using the corresponding maleinated SEBS (SEBS-g-MA). The mechanical properties of ternary composites were strongly dependent on microstructure. In this study, the composites with separate dispersion structure showed higher elongation, modulus and impact strength than those of encapsulation structure. Impact-fracture surface observation showed that the toughening mechanism was mainly due to the massive cavitation and extensive matrix yielding.

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Section: Fractographymentioning

confidence: 99%

Morphology and mechanical properties of high‐impact polystyrene/elastomer/magnesium hydroxide composites

Chang

Xie²,

Yang

2006

J of Applied Polymer Sci

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“…Varied research has been done to investigate the cocontinuous structured polymer composites via various techniques, including the solvent extraction technique, microscopy, and rheological analysis [11,[13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29] . Besides measurements like dynamic mechanical analysis (DMTA), tests such as stress-strain behavior, 55 impact properties, and electrical conductivity or resistivity are useful in distinguishing between disperse and co-continuous structures [9][10][11] . However, the mechanism of formation of cocontinuous structures during processing, and whether a cocontinuous structure is stable or an intermediate step that 60 eventually transforms into dispersed morphology, is not yet fully understood or clearly described.…”

Section: Introductionmentioning

confidence: 99%

“…Unfortunately, the addition of the metal hydroxides into polymers to meet the flame-retardant requirement is always extremely high, and the addition of high amounts of inorganic fillers would unavoidably deteriorate the mechanical properties of the resulting materials. Elongation at break is especially affected 55 due primarily to the poor interfacial adhesion between the two components [50][51][52][53] . However, in certain fields of industrial application, such as the material selection for wire and cable use, 10-15 MPa tensile strength and elongation at break larger than 150 % is basically prerequisite.…”

Section: Introductionmentioning

confidence: 99%

“…Generally, various elastomers are often used as the additional component to improve the toughness and flexibility of PP matrix, particularly for elongation at break. Among them, ethylene-octene copolymer (POE) has attracted 65 more and more interest because it is highly elastomeric and tolerates high filler loadings while retaining its flexible properties [54][55][56][57] . Moreover, POE has good compatibility with PP, is easily processed and recycled, which make it an ideal toughening modifier [58][59][60][61] .…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, POE has good compatibility with PP, is easily processed and recycled, which make it an ideal toughening modifier [58][59][60][61] . Yin et al investigated the fracture behaviour and 70 deformation mechanism of PP/POE at presence of magnesium hydroxide (Mg(OH) 2 , MDH) [55] . The author presented three possible types of microstructures existing in such composites.…”

Section: Introductionmentioning

confidence: 99%

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Morphology development of PP/POE blends with high loading of magnesium hydroxide

et al. 2015

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The influence of high loading magnesium hydroxide (Mg(OH) 2 , MDH) on the morphology and properties of the polypropylene (PP)/ethylene-octene copolymer (POE) blends has been investigated via scanning electron microscopy, dynamic mechanical thermal analysis and tensile mechanical testing. It was demonstrated that the mechanical properties, especially the elongation at break, are highly related to the phase structure exhibited by the composites. In the PP/POE 90/10 and 70/30 blends, the addition of a high 10 loading of MDH lowered the average diameter of the dispersed POE domains, also the MDH and POE domains were separately dispersed in the PP matrix. Meanwhile, the elongation at break of the samples sharply declined to an unacceptable level. While in the PP/POE 50/50 blends, a co-continuous structure was formed and it could be maintained even after large amount of MDH was added. The co-continuous structure was found to be a key factor for tolerating high loading of additives and retaining acceptable 15 mechanical properties, especially the elongation at break. Fig. 6 SEM micrographs of the PP/POE/MDH composites (weight ratio of PP/POE as 50/50) with different MDH contents: (a) 50 wt%; (b) 55 wt%; (c) 60 wt% 75

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Mechanical and rheological properties of PP/SEBS/OMMT ternary composites

Su¹,

Huang²

2009

J of Applied Polymer Sci

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The microstructure and mechanical properties of polypropylene (PP)/OMMT binary nanocomposites and PP/styrene-6-(ethylene-co-butylenes)-6-styrene triblock copolymer (SEBS)/OMMT ternary nanocomposites were investigated using X-ray diffraction (XRD), transmission electron microscopy (TEM), and rheology and electromechanical testing machine. The results show that the organoclay layers are mainly intercalated and partially exfoliated in the PP-based nanocomposites. The additions of SEBS and OMMT have no significant effect on the crystallization behavior of PP. At the same time, it can be concluded that the polymer chains of PP and SEBS have intercalated into the organoclay layers and increase the gallery distance after blending process based on the analytical results from TEM, XRD, and rheology, which result in the form of a percolated nanostructure in the PP-based nanocomposites. The results of mechanical properties show that SEBS filler greatly improve the notched impact strength of PP, but with the sacrifice of strength and stiffness. OMMT can improve the strength and stiffness of PP and slightly enhance the notched impact strength of PP/ PP-g-MA. In comparison with neat PP, PP/OMMT, and PP/SEBS binary composites, notched impact toughness of the PP/SEBS/OMMT ternary composites significantly increase. Moreover, the stiffness and strength of PP/ SEBS/OMMT ternary nanocomposites are slightly enhanced when compared with neat PP. It is believed that the synergistic effect of both SEBS elastomer and OMMT nanoparticles account for the balanced mechanical performance of the ternary nanocomposites.

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Fracture behavior and deformation mechanism of polypropylene/ethylene–octene copolymer/magnesium hydroxide ternary phase composites

Cited by 15 publications

References 22 publications

Morphology and mechanical properties of high‐impact polystyrene/elastomer/magnesium hydroxide composites

Morphology and mechanical properties of high‐impact polystyrene/elastomer/magnesium hydroxide composites

Morphology development of PP/POE blends with high loading of magnesium hydroxide

Mechanical and rheological properties of PP/SEBS/OMMT ternary composites

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