Rheology and morphology of layered polymer melts in shear

Michael B. DeBrule, Leon Levitt, Christopher W. Macosko

Research output: Contribution to conferencePaperpeer-review

1 Scopus citations


Multilayered polymer melt samples with 50 alternating layers of 20 μm average thickness were prepared from polystyrene (PS), reactive styrene copolymers (PS-OX and PS-MA), and amorphous polyamide (aPA). Rheological properties were characterized in steady and dynamic shear modes using a parallel plate rheometer. Optical and scanning electron microscopy were used to obtain images of samples before and after testing. Correlations were identified between break-up of the layers and increase or decrease of viscosity in steady shear testing. Reaction at the interface was shown to stabilize the layers against break-up. Two qualitatively different patterns of rheological behavior in dynamic shear were distinguished. The elastic modulus of the layered sample was typically greater than either corresponding constituent polymer at low frequencies. However, a nonreactive polymer system with low interfacial tension was additive.

Original languageEnglish (US)
Number of pages6
StatePublished - Dec 1 1996
EventProceedings of the 1996 54th Annual Technical Conference. Part 2 (of 3) - Indianapolis, IN, USA
Duration: May 5 1996May 10 1996


OtherProceedings of the 1996 54th Annual Technical Conference. Part 2 (of 3)
CityIndianapolis, IN, USA


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