TY - JOUR
T1 - Viscoelastic behaviour during the crystallisation of isotactic polypropylene
AU - Van Ruth, N. J.L.
AU - Vega, J. F.
AU - Rastogi, S.
AU - Martínez-Salazar, J.
N1 - Generated from Scopus record by KAUST IRTS on 2021-02-16
PY - 2006/6/1
Y1 - 2006/6/1
N2 - Morphology and viscoelastic behaviour during the initial stages of crystallisation of isotactic polypropylene were explored as a function of time and angular frequency by light microscopy and dynamic oscillatory rheology. Results were evaluated according to the Krieger-Dougherty and Palierne models for viscoelastic suspensions of spheres. The data obtained from light microscopy were introduced in the rheological models reproducing quite well the viscoelastic response during crystallisation. The Palierne model was able to describe the behaviour of the system, though it was not possible to observe all the model's features due to a limited angular frequency range. Further, at high filler contents, an 'equilibrium' modulus needs to be introduced for the model to fit the experimental data. The exponent required to model the changes occurring in the 'equilibrium' modulus over time resembles that of chemical gelation more than physical gelation. © 2006 Springer Science + Business Media, Inc.
AB - Morphology and viscoelastic behaviour during the initial stages of crystallisation of isotactic polypropylene were explored as a function of time and angular frequency by light microscopy and dynamic oscillatory rheology. Results were evaluated according to the Krieger-Dougherty and Palierne models for viscoelastic suspensions of spheres. The data obtained from light microscopy were introduced in the rheological models reproducing quite well the viscoelastic response during crystallisation. The Palierne model was able to describe the behaviour of the system, though it was not possible to observe all the model's features due to a limited angular frequency range. Further, at high filler contents, an 'equilibrium' modulus needs to be introduced for the model to fit the experimental data. The exponent required to model the changes occurring in the 'equilibrium' modulus over time resembles that of chemical gelation more than physical gelation. © 2006 Springer Science + Business Media, Inc.
UR - http://link.springer.com/10.1007/s10853-005-5507-6
UR - http://www.scopus.com/inward/record.url?scp=33746038982&partnerID=8YFLogxK
U2 - 10.1007/s10853-005-5507-6
DO - 10.1007/s10853-005-5507-6
M3 - Article
SN - 0022-2461
VL - 41
SP - 3899
EP - 3905
JO - Journal of Materials Science
JF - Journal of Materials Science
IS - 12
ER -