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Compatibilizing Bulk Polymer Blends by Using Organoclays Mayu Si, Tohru Araki, Harald Ade, A. L. D. Kilcoyne, Robert Fisher,
 

Summary: Compatibilizing Bulk Polymer Blends by Using Organoclays
Mayu Si, Tohru Araki, Harald Ade, A. L. D. Kilcoyne, Robert Fisher,
Jonathan C. Sokolov, and Miriam H. Rafailovich*,
Department of Materials Science and Engineering, State UniVersity of New York at Stony Brook,
Stony Brook, New York 11794-2275; Department of Physics, North Carolina State UniVersity,
Raleigh, North Carolina 27695; AdVanced Light Source, Lawrence Berkeley Laboratory,
Berkeley, California 94720-8225; and Hebrew Academy of Nassau County High School,
Uniondale, New York 11553
ReceiVed January 18, 2006; ReVised Manuscript ReceiVed March 28, 2006
ABSTRACT: We have studied the morphology of blends of PS/PMMA, PC/SAN24, and PMMA/EVA and
compared the morphologies with and without modified organoclay Cloisite 20A or Cloisite 6A clays. In each
case we found a large reduction in domains size and the localization of the clay platelets along the interfaces of
the components. The increased miscibility was accompanied in some cases, with the reduction of the system
from multiple values of the glass transition temperatures to one. In addition, the modulus of all the systems
increased significantly. A model was proposed where it was proposed that in-situ grafts were forming on the clay
surfaces during blending and the grafts then had to be localized at the interfaces. This blending mechanism
reflects the composition of the blend and is fairly nonspecific. As a result, this may be a promising technology
for use in processing recycled blends where the composition is often uncertain and price is of general concern.
Introduction
Forming polymer blends is a traditional method for making

  

Source: Ade, Harald W.- Department of Physics, North Carolina State University

 

Collections: Physics