Polymer blends, grafts, and blocks, broadly defined, encompass all of the ways in which two or more kinds of poly- mer molecules can be mixed and/or joined. Because these mate- rials exhibit non-linear and often synergistic properties, they have found increasing application in our technology. Their multifarious uses have, in turn, spurred new research efforts, to find yet different ways of joining two kinds of polymer molecules, with novel physical and/or mechanical behavior patterns. In August, 1973, the Polymer Division of the American Chemical Society sponsored a symposium at its meeting...