Compatibilization and mechanical properties of compression-molded polypropylene/high-impact polystyrene blends

Abstract

This research work focused on polypropylene/high-impact polystyrene polymer blends. Since this blend (80/20 in weight) was incompatible, styrene–ethylene–butylene–styrene (SEBS) block copolymer, styrene–butadiene–styrene (SBS), and ethylene vinyl acetate were tested as compatibilizers (2.5 or 7.5 wt% in relation to blend). After blending via extrusion, the compositions were compression molded and their mechanical (tensile and impact), morphological (scanning electron microscopy), and rheological (melt flow index and viscosity) properties were evaluated. Blends containing SBS and 7.5 wt% of SEBS showed a positive effect regarding impact strength, although with a decrease in Young’s modulus and tensile strength. Rheological characteristics were also affected by the compatibilizers.

Keywords

Blends PP/HIPS compatibilization characterization

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References

Omonov

Harrats

Moldenaers

. Phase continuity detection and phase inversion phenomena in immiscible polypropylene/polystyrene blends with different viscosity ratios. Polymer 2007; 48(20): 5917–5927.

Wang

Xie

. Compatibilization and morphology development of immiscible ternary polymer blends. Polymer 2011; 52(1): 191–200.

Wang

Gao

Fang

. Compatibilizing effect of mesoporous fillers on the mechanical properties and morphology of polypropylene and polystyrene blend. Mater Des 2011; 32(3): 1222–1228.

Tiwari

Pau

. Effect of organoclay on the morphology, phase stability and mechanical properties of polypropylene/polystyrene blends. Polymer 2011; 52(1): 1141–1154.

Utracki

. Polymer blends handbook. 1st. ed. London: Kluwer Academic Publishers, 2002.

Sheng

. Evolution of phase dimensions and interfacial morphology of polypropylene/polystyrene compatibilized blends during mixing. Eur Polym J 2007; 43: 561–572.

Perrin

Mantaux

Ienny

. Influence of impurities on the performances of HIPS recycled from waste electric and electronic equipment (WEEE). Waste Manage 2016; 56: 438–445.

Parres

Balart

Lopez

. Changes in the mechanical and thermal properties of high impact polystyrene (HIPS) in the presence of low polypropylene (PP) contents. J Mater Sci 2008; 43: 3203–3209.

Montagna

Bento

Silveira

MRD

. Evaluation of the effect of the incorporation of rubber tire waste particles on the properties of PP, HIPS and PP/HIPS matrices. Polim Ciencia e Tecnol 2013; 23(2): 169–174.

10.

Melo

TJA

Carvalho

Calumby

. Propriedades mecânicas e morfologia de uma blenda polimérica de PP/HIPS compatibilizada com SEBS. Polímeros 2006; 10: 71–78.

11.

Santana

RMC

Manrich

. Morphology and mechanical properties of polypropylene/high-impact polystyrene blends from postconsumer plastic waste. J Appl Polym Sci 2003; 88: 2861–2867.

12.

Radonjic

Musil

Smit

. Compatibilization of polypropylene/polystyrene blends with poly (styrene-b-butadiene-b-styrene) block copolymer. J Appl Polym Sci 1998; 69: 2625–2639.

13.

Halimatudahliana

Nasir

. The effect of various compatibilizers on mechanical properties of polystyrene/polypropylene blend. Polym Test 2002; 21(2): 163–170.

14.

Ayrilmis

Tasdemir

Akbulut

. Water absorption and mechanical properties of PP/HIPS hybrid composites filled with wood flour. Polym Compos 2017; 38: 863–869.

15.

Joseph

Thomas

. Morphology, morphology development and mechanical properties of polystyrene/polybutadiene blends. Eur Polym J 2003; 39: 115–125.

16.

Macaúbas

Demarquete

. Morphologies and interfacial tensions of immiscible polypropylene/polystyrene blends modified with triblock copolymers. Polymer 2001; 42(6): 2543–2554.