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Atomic force microscopy imaging of viscoelastic properties in toughened polypropylene resins

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3 Author(s)
Nysten, Bernard ; Unité de chimie et de physique des hauts polymères, Université catholique de Louvain, place Croix du Sud, 1, B‐1348 Louvain‐la‐Neuve, Belgium ; Legras, Roger ; Costa, Jean‐Louis

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The bulk morphology of two toughened polypropylene/(ethylene propylene)copolymer resins (PP/EP) presenting different impact resistances has been studied by means of different atomic force microscopy techniques: contact atomic force microscopy, lateral force microscopy (LFM), and force modulation microscopy (FMM). The three techniques reveal two different morphologies as observed in transmission electronic microscopy. In LFM, a higher friction force is observed on the rubbery phase which has the lower Young’s modulus confirming the relationship between friction force and elastic properties. In force modulation, the elastic moduli is found to be much lower on the EP nodules in both resins. FMM also reveals that the difference of viscous response between the PP matrix and the EP nodules is much lower in the resin which is less impact resistant. © 1995 American Institute of Physics.

Published in:

Journal of Applied Physics  (Volume:78 ,  Issue: 10 )

Date of Publication:

Nov 1995

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