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Hengrui Yang, C. Han, J. Kim (1994)
RHEOLOGY OF MISCIBLE BLENDS OF POLY(METHYL METHACRYLATE) WITH POLY(STYRENE-CO-ACRYLONITRILE) AND WITH POLY(VINYLIDENE FLUORIDE)Polymer, 35
Properties of mLLDPE Blown Films Extruded Utilizing Boron Nitride - Based Polymer Process Aids
The Effect of Process Aids on the Rheological Properties of Rigid PVC Melt
Fundamentals of Melt Fracture Elimination Using Fluoropolymer Process Aids ” and “ Process Aid Optimization in UniModal HDPE Blown Film
F. Ide, K. Okano (1981)
Effects of blending acrylic polymers on the physical properties and processing behavior of poly(vinyl chloride)Pure and Applied Chemistry, 53
(2000)
“Influence of Shear History on the Mechanical Properties of Unplastified Formulated PVC,”
Peggy Schipper, Janine Black, T. Dymek (1996)
Foamed rigid vinyl for building productsJournal of Vinyl & Additive Technology, 2
J. Sandler, F. Wöllecke, V. Altstädt, E. Wettstein, D. Rakutt (2000)
Principal correlation of PVC melt elongational properties with foam cell morphologyCellular Polymers, 19
C. Han, Jinhwan Kim, J. Kim (1989)
Determination of the order-disorder transition temperature of block copolymersMacromolecules, 22
H. Chuang, C. Han (1984)
Rheological behavior of polymer blendsJournal of Applied Polymer Science, 29
J. Pfennig, D. Dunkelberger (1986)
Effect of acrylic processing aids on PVC die swellJournal of Vinyl & Additive Technology, 8
(1978)
Effects of Processing Aids and Impact Modifiers on Processing Characteristics of Rigid PVC,
In this work, the viscoelastic properties of acrylic‐based copolymer blends with poly(methyl methacrylate) (PMMA) and polycarbonate were investigated in the molten and solid states. High molecular weight copolymers of methyl methacrylate with butyl acrylate (MMA‐co‐BA) having varying molecular weight and composition were used to enhance the rheological properties in shear and extension. Blends containing up to 15 wt% of copolymer were prepared at 200°C and 150 rpm by using a DSM micro‐compounder. The samples were characterized by size exclusion chromatography (SEC), dynamic mechanical analysis (DMA), and rheology. The rheological properties were determined by using small amplitude oscillatory measurements (SAOM) in shear and a Rheotens™ device for melt strength determination. For PMMA, the effects of high molecular weight PMMA copolymer on the matrix were related to the molecular weight, the tacticity of the copolymer, and the individual components. The rheological properties in shear showed enhanced storage and loss moduli at low frequency, while no change was observed at high frequency. In addition, extensional viscosity measurements made by using the filament stretching technique showed a significant increase in melt strength compared to that of the base PMMA with the blend containing the highest molecular weight copolymer showing the maximum force and a reduced drawdown ratio. For polycarbonate, its blends with acrylic copolymer were found to be immiscible. Similar enhancement in the moduli at low frequencies was observed, but a significant increase in the viscosity was obtained as well, resulting from the response of the two‐phase system. This change in the rheological properties was further increased at 15 wt% loading. Owing to the formation of a phase‐separated morphology, the melt strength was found to increase only slightly. J. VINYL. ADDIT. TECHNOL., 12:143–150, 2006. © 2006 Society of Plastics Engineers
Journal of Vinyl & Additive Technology – Wiley
Published: Sep 1, 2006
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