Effect of in-situ formed core–shell inclusions on the mechanical properties and impact fracture of polypropylene

Jančář, J.; Žídek, Jan

doi:10.1016/j.eurpolymj.2015.07.057

Cited by 4 publications

(2 citation statements)

References 38 publications

(80 reference statements)

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“…[8][9][10] Therefore, an understanding of mixing protocols helps engineers and researchers to tailor the processing conditions to attain satisfactory final properties. [16,17] Moreover, debonding at matrixrubber interface was assessed to bring void formation, which results in localized stress concentration and the initiation of destructive crack growth. Rubber particle elasticity and cavitation efficiency decrease as the NC particles confine to the dispersed rubber particles.…”

Section: Introductionmentioning

confidence: 99%

“…Indeed, cavitation is deduced to cause strong shear yielding and impart high impact strength to a blend. In contrast, debonding can have both positive and negative effects on impact strength; however, this mechanism is inferred to have a detrimental influence and acts as a flaw for tough polymer‐based nanocomposites . Moreover, debonding at matrix‐rubber interface was assessed to bring void formation, which results in localized stress concentration and the initiation of destructive crack growth …”

Section: Introductionmentioning

confidence: 99%

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Toughening of polyamide 12/nanoclay nanocomposites by incompatible styrene‐butadiene‐styrene rubber through tailoring interfacial adhesion and fracture mechanism

2017

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The main drawback of polyamide 12 (PA 12)/nanoclay nanocomposites in their wide range of potential engineering applications known as diminished toughness was overcome using incompatible styrene-butadiene-styrene block copolymer (SBS) rubber. Applying optimal processing parameters for co-rotating twin-screw extrusion resulted in strong interfacial adhesion of matrix and rubber and intercalated and delaminated nanoclay stacks confined in the matrix. The formulation of compatibilized PA 12/SBS/nanoclay nanocomposites was optimized by employing response surface Box-Behnken methodology. A combination of microscopic methods, that is, atomic force microscopy, transmission and scanning electron microscopy, and transmission optical microscopy, along with single-edge-double-notch four-point-bending technique, was exploited to exhaustively explore the toughening mechanisms and microstructure. The findings verify that by tailoring the rubber/matrix interfacial strength and nanocomposite morphology, the Izod impact strength of PA 12/nanoclay nanocomposites is noticeably improved even by incorporating an incompatible rubber and tough fracture mechanisms including rubber particle cavitation and largescale shear yielding are attained. K E Y W O R D Sdamage zone, nanocomposites, polyamides, rubber, toughness

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