Morphological, mechanical, and thermal properties of PP/SEBS/talc composites

Oliveira, Carlos Ivan Ribeiro de; Rocha, Marisa Cristina Guimarães; Assis, Joaquim Teixeira de; Silva, Ana Lúcia Nazareth da

doi:10.1177/0892705719876678

Cited by 21 publications

(19 citation statements)

References 30 publications

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“…Li et al examined dynamic mechanical behavior of PS/CaCO 3 nanocomposites modified with poly(styrene–isoprene–styrene) triblock copolymer (SIS) and maleic anhydride–grafted SIS (SIS-MAH). 20 It was found that nano-sized CaCO 3 led to an enhancement in the storage modulus of PS/SIS blend. The temperature corresponding to the peak value of loss modulus of isoprene block in the blend was found to increase with 5 phr nano-CaCO 3 , while that of PS block exhibited a little change.…”

Section: Introductionmentioning

confidence: 99%

Preparation of tough, high modulus, and creep-resistant PS/SIS/halloysite blend nanocomposites

Tekay

2020

Journal of Thermoplastic Composite Materials

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In this work, polystyrene (PS)/poly(styrene-b-isoprene-b-styrene) (SIS)/organophilic halloysite nanotube (Org-HNT) blend nanocomposites were produced by melt compounding technique. The significant improvements in both toughness and impact strength values were obtained in PS/SIS blends containing 20%, 30%, and 40% SIS elastomer as compared to neat PS. Among them, PS-30SIS blend with a co-continuous morphology exhibited moderate tensile and impact properties and its nanocomposites having 3, 5, 7 and 10 phr Org-HNT were prepared through the melt mixing method. All the nanocomposites exhibited continuous/fibrillar morphologies with smaller elastomer domains and higher tensile modulus and toughness as compared to PS-30SIS blend. Among them, the nanocomposite having 7 phr Org-HNT and 30% SIS phase (7H-30SIS) exhibited the highest impact strength with enhanced tensile properties. The same nanocomposite exhibited about 21% and 100% increments in the modulus and toughness in comparison to its blend, respectively. The 7H-30SIS nanocomposite increased storage moduli of PS-30SIS blend at glass transition regions of both polyisoprene and PS phases and also at room temperature. Moreover, the rubbery storage moduli of the nanocomposites were found to be about 37% and 53% higher for 7 and 10 phr Org-HNT loaded nanocomposites, respectively, in comparison with that of PS-30SIS blend. The creep deformation and permanent deformation of the blend both decreased via introduction of the nanotubes which is in agreement with aforementioned improvements in the stiffness.

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Section: Introductionmentioning

confidence: 99%

Preparation of tough, high modulus, and creep-resistant PS/SIS/halloysite blend nanocomposites

Tekay

2020

Journal of Thermoplastic Composite Materials

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“…PP has been melt blended with clays [ 19 , 20 , 21 ], CaCO 3 [ 8 , 22 , 23 , 24 , 25 ], talc [ 26 , 27 , 28 , 29 ], mica [ 30 , 31 ], kaolin [ 28 , 32 , 33 , 34 ], and other mineral fillers [ 35 , 36 ] typically used in the polymer composites industry. Talc and CaCO 3 are among the most preferred fillers used to produce PP compounds.…”

Section: Introductionmentioning

confidence: 99%

“…On the other hand, there is a dramatic decrease in the strain at break and impact resistance [ 39 ], especially at high talc percentage, with the latter parameter being of great importance for many PP applications. To improve the proprieties of MF PP composites, different experimental strategies have been applied: using fillers with various surface treatments [ 40 , 41 , 42 ]; compatibilizing agents [ 43 , 44 , 45 ] such as PP functionalized/grafted with maleic anhydride (PP-g-MA) [ 46 , 47 ]; using elastomers [ 26 ]; special modifiers/additives [ 48 ]; following the addition and synergies between micro- and/or nano-fillers [ 49 , 50 , 51 , 52 ], and so on.…”

Section: Introductionmentioning

confidence: 99%

Engineering Polypropylene–Calcium Sulfate (Anhydrite II) Composites: The Key Role of Zinc Ionomers via Reactive Extrusion

et al. 2023

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Polypropylene (PP) is one of the most versatile polymers widely used in packaging, textiles, automotive, and electrical applications. Melt blending of PP with micro- and/or nano-fillers is a common approach for obtaining specific end-use characteristics and major enhancements of properties. The study aims to develop high-performance composites by filling PP with CaSO4 β-anhydrite II (AII) issued from natural gypsum. The effects of the addition of up to 40 wt.% AII into PP matrix have been deeply evaluated in terms of morphology, mechanical and thermal properties. The PP–AII composites (without any modifier) as produced with internal mixers showed enhanced thermal stability and stiffness. At high filler loadings (40% AII), there was a significant decrease in tensile strength and impact resistance; therefore, custom formulations with special reactive modifiers/compatibilizers (PP functionalized/grafted with maleic anhydride (PP-g-MA) and zinc diacrylate (ZnDA)) were developed. The study revealed that the addition of only 2% ZnDA (able to induce ionomeric character) leads to PP–AII composites characterized by improved kinetics of crystallization, remarkable thermal stability, and enhanced mechanical properties, i.e., high tensile strength, rigidity, and even rise in impact resistance. The formation of Zn ionomers and dynamic ionic crosslinks, finer dispersion of AII microparticles, and better compatibility within the polyolefinic matrix allow us to explain the recorded increase in properties. Interestingly, the PP–AII composites also exhibited significant improvements in the elastic behavior under dynamic mechanical stress and of the heat deflection temperature (HDT), thus paving the way for engineering applications. Larger experimental trials have been conducted to produce the most promising composite materials by reactive extrusion (REx) on twin-screw extruders, while evaluating their performances through various methods of analysis and processing.

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“…1 Among them, SEBS is a styrenic thermoplastic elastomer with a saturated backbone and it has been widely used in the production of polymer blends and composites to increase the toughness and impact resistance of engineering plastics. 2 It has been utilized in different applications such as coatings, adhesives, footwear, impact modifiers for plastics, 1 as well as automotive parts and white goods. 3,4 SEBS and maleic anhydride-grafted SEBS (SEBS- g -MA) polymers have been studied in different researches as matrix and compatibilizer, respectively.…”

Section: Introductionmentioning

confidence: 99%

Preparation of high-strength SEBS nanocomposites reinforced with halloysite nanotube: Effect of SEBS-g-MA compatibilizer

Arman

Tekay

Şen

2019

Journal of Thermoplastic Composite Materials

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Poly(styrene -b-ethylene- co-butylene -b-styrene) (SEBS)/organophilic halloysite nanotube (Org-HNT) nanocomposites were prepared by solution mixing and then compression molded. Maleic anhydride grafted SEBS (SEBS- g-MA) was also used as a compatibilizer in preparation of SEBS/SEBS- g-MA/Org-HNT ternary nanocomposites. Surface morphologies and both static and dynamic mechanical analyses as well as thermal stabilities of the nanocomposites were carried out. Both the binary and ternary nanocomposites exhibited higher tensile moduli, tensile strength, and toughness values compared to neat SEBS. The elastic modulus was found to increase about 385% and 320% with addition of 3 and 5 phr Org-HNT into the SEBS matrix, respectively, while the maximum toughness was achieved via SEBS-5H composite with an increase of 45%. The ternary nanocomposite having 3 phr Org-HNT and 10 phr SEBS- g-MA (3H10SMA) gave about a 325% and 103% increase in the elastic modulus and toughness, respectively, together with a 75% increase in the tensile strength as the maximum value. This result was ascribed to interactions of the surface of the nanotubes with the maleic anhydride (MA) group of the compatibilizer. The same nanocomposite was also found to have two times higher dynamic storage modulus at 25°C than neat SEBS and almost the same damping value, which is an indication of improvement in the elastic character of SEBS without impairing its damping ability. Although a much higher damping value was obtained via use of 20 phr SEBS- g-MA with the same amount of nanotubes, the corresponding storage modulus decreased too much, close to that of neat SEBS. The enhanced tensile modulus, strength, and toughness of the 3H10SMA nanocomposite, which is consistent with its dynamic mechanical properties, indicate a good balance between the toughness/damping and stiffness. Moreover, all the nanocomposites exhibited better thermal stabilities than neat SEBS, showing higher midpoint degradation temperatures and peak maximum temperatures at which the maximum degradation occurs.

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Morphological, mechanical, and thermal properties of PP/SEBS/talc composites

Cited by 21 publications

References 30 publications

Preparation of tough, high modulus, and creep-resistant PS/SIS/halloysite blend nanocomposites

Preparation of tough, high modulus, and creep-resistant PS/SIS/halloysite blend nanocomposites

Engineering Polypropylene–Calcium Sulfate (Anhydrite II) Composites: The Key Role of Zinc Ionomers via Reactive Extrusion

Preparation of high-strength SEBS nanocomposites reinforced with halloysite nanotube: Effect of SEBS-g-MA compatibilizer

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