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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Bibliographic Details
Published in:Macromolecular materials and engineering Vol. 298; no. 12; pp. 1309 - 1314
Main Authors: Zabaleta, Asier, González, Imanol, Eguiazábal, José Ignacio
Format: Journal Article
Language:English
Published: Weinheim Blackwell Publishing Ltd 01.12.2013
Wiley
John Wiley & Sons, Inc
Subjects:
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
Online Access:Get full text
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Summary: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.
Bibliography: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
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ISSN:1438-7492
1439-2054
DOI:10.1002/mame.201200454