WORKING PARTY ON STRUCTURE AND
PROPERTIES OF COMMERCIAL POLYMERS
Number: 421/33/95
Title: Rheological and Mechanical
Properties of P-alpha-MSAN/PMMA Blends in Miscible and Phase Separated
Regimes of Various Morphologies
Coordinator(s): H.M.
Laun, L.
Lyngaae-Jörgensen and V.
Altstädt
Completion Date: 2003
Objective:
The P-alpha-MSAN/PMMA and PMMA components have been selected to
have very similar melt viscosity, viscoelasticity and temperature
dependence at 230 C. Miscible blends are obtained below 160 C. Annealing
at elevated temperatures creates phase separation and various morphologies
(droplets or co-continuous structure) at constant composition. The
project aims to investigate the effect of blend morphology (detected
by microscopy or light scattering) on rheological properties of
the melt (mechanical spectroscopy, viscosity function and melt elasticity)
and on the mechanical behaviour in the solid state. Focus will be
put on the manifestation of the interface in the dynamic-mechanical
behaviour of the melt. In addition morphological changes due to
simple flow situations (shear and elongational flow) will be investigated.
The P MSAN component will also be used to compare the degree of
agreement in mechanical spectroscopy and viscosity function measurements
from various laboratories. This international collaborative study
also intends to address areas of missing knowledge.
Progress:
The following publications are direct products on this project:
"Rheological and mechanical properties
of poly(alpha-methyl-co-acrylonitrile)/poly(methyl methacrylate)
blends in miscible and phase separated regimes of various morphologies:"
Part 1.
Characterization of constituents, blend preparation, and overview
on blend morphology, Pure Appl. Chem.70, pp. 1547-1566,
1998.
Part 2. Limits of miscibility in the quiescent state and during
flow, by V. Schytt and J. Lyngaae-Jorgensen, Polym. Networks
Blends 7, 77-86 (1997).
"Manifestation of phase separation
processes in oscillatory shear: droplet-matrix systems vesus co-continuous
morphologies", by I. Vinckier and H.M. Laun, Rheol. Acta.
38, 274-286 (1999).
"Manifestation of spinodal decomposition
in oscillatory shear measurements", by I. Vinckier and H.M.
Laun, Macromol. Symp. 149, 151-156 (2000).
"Rheology and morphology of phase-separating
polymer blends", by Z.I. Zhang, H.D. Zhang, Y.L. Yang, I. Vinckier
and H.M. Laun
Macromolecules 34, 1416-1429 (2001).
"Compatibility of poly(a-methylstyrene-co-acrylonitrile) with
PMMA. A neutron and cloud point study", by D.W. Schubert, Mat.
Res. Innovat. 4, 353-359 (2001).
"Assessment of the Doi-Ohta theory for co-continuous blends
under oscillatory flow", by I. Vinckier and H.M. Laun, J.
Rheol. 45, 1373-1385 (2001).
"Interfacial tension in a LCST blend: Effect of temperature,
blend composition and deformation of the interphase', by I. Vinckier,
T. Schweizer and H. M. Laun, J. Polym. Sci. Part B 40,
679-690 (2002).
"Consistent analysis of cloud points and spinodal - compatibility
of P(aMS -co-AN) and P(MA-co-MMA)",
by F. Havermeyer and D. W. Schubert, Mat. Res. Innovat. 6,
185-188 (2002).
"The role of pressure and dissipative heating in capillary
rheometry of polymer melts", by H. M. Laun
Rheol. Acta 2002, in press
"Rheological and mechanical properties of poly(a-methylstyrene-co-
acrylonitrile)/ poly[(methyl acrylate-co-methyl methacrylate)]
blends in miscible and phase separated regimes of various morphologies.
Part 4. Influence of the morphology on the mechanical properties",
by V. Altstädt, L. de Lucca Freitas and D. W. Schubert
Pure
Appl. Chem. 76(2),
389-413, 2004
Last update: 3 April 2004
