Dependence of the Morphological Location of the Brittle/Tough Transition on the Modulus of the Dispersed Phase

The dispersed phase of the polypropylene/maleinized poly(ethylene‐octene) (PP/mPEO) blend was modified by means of nanoclay addition, in an attempt to find out the effect of its modulus of elasticity on the location of the brittle/tough (B/T) transition. The nanoclay stayed only in the dispersed rub...

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Veröffentlicht in:	Macromolecular materials and engineering Jg. 298; H. 12; S. 1309 - 1314
Hauptverfasser:	Zabaleta, Asier, González, Imanol, Eguiazábal, José Ignacio
Format:	Journal Article
Sprache:	Englisch
Veröffentlicht:	Weinheim Blackwell Publishing Ltd 01.12.2013 Wiley John Wiley & Sons, Inc
Schlagworte:	Applied sciences brittle/tough transition Composites critical interparticle distance Dependence Dispersion Exact sciences and technology Forms of application and semi-finished materials impact resistance nanocomposites Polymer industry, paints, wood Technology of polymers Young's modulus Organic clay Polymer blends Montmorillonite Property composition relationship Dispersion degree Propylene polymer Mechanical properties Thermoplastic rubber Dispersion reinforced material Experimental study Functional polymer nanocomposites Heterogeneous mixture brittle/tough transition Ductile brittle transition Young's modulus critical interparticle distance impact resistance Impact strength Morphology Nanocomposite Phase partition
ISSN:	1438-7492, 1439-2054
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Zusammenfassung:	The dispersed phase of the polypropylene/maleinized poly(ethylene‐octene) (PP/mPEO) blend was modified by means of nanoclay addition, in an attempt to find out the effect of its modulus of elasticity on the location of the brittle/tough (B/T) transition. The nanoclay stayed only in the dispersed rubbery phase upon blending. Upon nanoclay addition, the B/T transition slipped to larger rubber contents; this slip is proposed to be due to the higher modulus of elasticity of the rubbery phase. Looking at the microstructure, the critical interparticle distance (τc) for the B/T transition to occur is less when the dispersed phase is stiffer; i.e., the rubber particles have to be closer to each other for the transition to occur. The dispersed phase of the PP/mPEO blend is modified by means of nanoclay addition via melt mixing. Due to the high affinity of the nanoclay to the maleic anhydride groups of mPEO, the nanoclay stays only in the dispersed rubbery phase. The nanoclay presence causes a displacement of the B/T transition, showing that the stiffer the dispersed rubbery phase is, the larger the rubber content necessary for the B/T transition to occur.
Bibliographie:	Basque Government - No. Project n° IT-234-07 ark:/67375/WNG-RJ23RT2L-X ArticleID:MAME201200454 University of the Basque Country - No. UFI 11-56 istex:22AE228D34E600AD76910F29D2763ECF536DD8F3 Spanish Ministry of Science and Innovation - No. Project n° MAT2010-16171 ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 14 ObjectType-Article-2 ObjectType-Feature-1 content type line 23
ISSN:	1438-7492 1439-2054
DOI:	10.1002/mame.201200454