The influence of metallocene-based LLDPE on polypropene compounds in the presence of SEBS and talcum

Stricker, Florian; Maier, Reinhard; Mülhaupt, Rolf

doi:10.1002/(sici)1522-9505(19980401)256:1<95::aid-apmc95>3.0.co;2-3

Cited by 11 publications

(9 citation statements)

References 14 publications

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“…Also, additional toughening can result from bridging of elastomer particles in a crack during further deformation of the blends owing to strong interfacial adhesion between elastomer particles and iPP matrix. Similar observations were reported previously [44, 55–57, 60–62, 66].…”

Section: Resultssupporting

confidence: 92%

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Mechanical properties of glass bead‐ and wollastonite‐filled isotactic‐polypropylene composites modified with thermoplastic elastomers

Balkan

Demirer

2010

Polymer Composites

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Mechanical properties of the isotactic-polypropylene/ glass bead (iPP/GB) and iPP/wollastonite (iPP/W) composites modified with thermoplastic elastomers, the poly(styrene-b-ethylene-co-butylene-b-styrene) copolymer (SEBS) and corresponding block copolymer grafted with maleic anhydride (SEBS-g-MA), were investigated. An increase in toughness of iPP with the elastomers was associated with a decrease in rigidity and strength. Mechanical performance of iPP increased more with acicular W than with spherical GB due to reinforcing effect of W. Comparing the (iPP/GB)/ SEBS and (iPP/W)/SEBS composites having the separate microstructure, strength and toughness values of the iPP/GB and iPP/W composites increased more with SEBS-g-MA at the expense of rigidity due to the coreshell microstructure with strong interfacial adhesion. Moreover, the iPP/W composite exhibited superior mechanical performance with 2.5 and 5 vol% of SEBSg-MA because of a positive synergy between the coreshell microstructure and reinforcing effect of acicular W. The extended models revealed that the elastomer and filler particles in the (iPP/GB)/SEBS and (iPP/W)/ SEBS composites acted individually due to the separate microstructure. However, the rigid GB and W particles encapsulated with the thick elastomer interlayer (R 0 /R 1 ¼ 0.91) in the (iPP/GB)/SEBS-g-MA and (iPP/W)/ SEBS-g-MA composites acted like neither big elastomer particles nor like individual rigid particles, inferring more complicated failure mechanisms in the core-shell composites. POLYM. COMPOS.

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Section: Resultssupporting

confidence: 92%

“…It was reported that additional increase in E ‐moduli of polymer composites with rigid fillers due to stiffer crystalline phase than amorphous one [88, 89]. Stricker et al [66] found an increase in E ‐modulus of iPP with talc due to the stiffening and nucleating ability of talc.…”

Section: Resultsmentioning

confidence: 99%

Mechanical properties of glass bead‐ and wollastonite‐filled isotactic‐polypropylene composites modified with thermoplastic elastomers

Balkan

Demirer

2010

Polymer Composites

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“…Because PS and polyolefins are incompatible and their blends show poor mechanical properties, their compatibilization is of great interest. It has been found that diblock and triblock copolymers of styrene and butadiene6–14 and poly[styrene‐ block ‐(ethene‐ co ‐butene)‐ block ‐styrene]10, 12, 15–20 can serve as compatibilizers for PS/polyolefin blends. Grades of both copolymers, with quite a broad scale of molecular structures, are commercially available.…”

Section: Introductionmentioning

confidence: 99%

Effect of the molecular structure of ethene–propene and styrene–butadiene copolymers on their compatibilization efficiency in low‐density polyethylene/polystyrene blends

Starý

Fortelný

Kruliš

et al. 2007

J of Applied Polymer Sci

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The effect of the molecular structure of styrene-butadiene (SB) block copolymers and ethene-propene (EPM) random copolymers on the morphology and tensile impact strength of low-density polyethylene (LDPE)/polystyrene (PS) (75/25) blends has been studied. The molecular characteristics of SB block copolymers markedly influence their distribution in LDPE/PS blends. In all cases, an SB copolymer is present not only at the interface but also in the bulk phases; this depends on its molecular structure. In blends compatibilized with diblock copolymers, compartmentalized PS particles can also be observed. The highest toughness values have been achieved for blends compatibilized with triblock SB copolymers. A study of the compatibilization efficiency of SB copolymers with the same number of blocks has shown that copolymers with shorter PS blocks are more efficient. A comparison of the obtained results with previous results indicates that the compatibilization efficiency of a copolymer strongly depends both on the blend composition and on the properties of the components. The compatibilization efficiency of an EPM/SB mixture is markedly affected by the rheological properties of the copolymers. The addition of an EPM/ SB mixture containing EPM with a higher viscosity leads to a higher improvement or at least the same improvement in the tensile impact strength of a compatibilized blend as the same amount of neat SB.

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“…Besides, X c of the iPP/SEBS blends was found to be lower than that of the iPP/SEBS‐MA blends. Stricker et al [85] found negligible variations in T m and a slight decrease in X c of iPP with SEBS.…”

Section: Resultsmentioning

confidence: 99%

Microstructural characteristics of glass bead‐ and wollastonite‐filled isotactic‐polypropylene composites modified with thermoplastic elastomers

Balkan

Demirer

2009

Polymer Composites

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Microstructural characteristics of isotactic-polypropylene/glass bead (iPP/GB) and iPP/wollastonite (iPP/W) composites modified with thermoplastic elastomers, poly(styrene-b-ethylene-co-butylene-b-styrene) copolymer (SEBS) and corresponding block copolymer grafted with maleic anhydride (SEBS-g-MA), were investigated. Scanning electron microscopy (SEM), differential scanning calorimetry (DSC), and dynamic mechanical analyses (DMA) showed that the iPP/SEBS and iPP/SEBS-g-MA blends were partially compatible two-phase systems. Well-dispersed spherical GB and acicular W particles without evidence of interfacial adhesion were observed in the iPP/GB and iPP/W binary composites respectively. Contrary to the blends, melt flow rates of the iPP/GB and PP/W composites decreased more with SEBS-g-MA than with SEBS because of enhanced interfacial adhesion with SEBSg-MA elastomer. The SEM analyses showed that the ternary composites containing SEBS exhibited separate dispersion of the rigid filler and elastomer particles (i.e., separate microstructure). However, SEBS-g-MA elastomer not only encapsulated the spherical GB and acicular W particles completely with strong interfacial adhesion (i.e., core-shell microstructure) but also dispersed separately throughout iPP matrix. In accordance with the SEM observations, the DSC and DMA revealed quantitatively that the rigid filler and SEBS particles in iPP matrix acted individually, whereas the rigid filler particles in the ternary composites containing SEBS-g-MA acted like elastomer particles because of the thick elastomer interlayer around the filler particles. The Fourier transform infrared analyses revealed an esterification reaction inducing the strong interfacial adhesion between the SEBS-g-MA phase and the filler particles. POLYM. COMPOS.FIG. 12. Storage modulus (E 0 ) and damping factor (tan d) variations of the ternary composites as a function of temperature.

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The influence of metallocene-based LLDPE on polypropene compounds in the presence of SEBS and talcum

Cited by 11 publications

References 14 publications

Mechanical properties of glass bead‐ and wollastonite‐filled isotactic‐polypropylene composites modified with thermoplastic elastomers

Mechanical properties of glass bead‐ and wollastonite‐filled isotactic‐polypropylene composites modified with thermoplastic elastomers

Effect of the molecular structure of ethene–propene and styrene–butadiene copolymers on their compatibilization efficiency in low‐density polyethylene/polystyrene blends

Microstructural characteristics of glass bead‐ and wollastonite‐filled isotactic‐polypropylene composites modified with thermoplastic elastomers

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