Recent Advances in Polymer Blends, Grafts, and BlocksL. Sperling 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 in Chi cago on Polymer Blends, Grafts, and Blocks. This book collects the papers presented at that symposium. Yet, it is more than just a collection of papers, for we here display the thinking and efforts of a number of top-ranking American and foreign scientists in one of the world's more active research areas. The symposium emphasized the interrelationships among synthetic detail, morphology, and physical and mechanical properties. Several novel syntheses were presented. These include oxidation resistant thermoplastic elastomers (Holden), a graft copolymer based thermoplastic elastomer (Kennedy and Smith), a cationic graft copolymer (Kennedy, Charles, and Davidson), an AB crosslinked copolymer (Bamford and Eastmond), an interpenetrating polymer network (Donatelli, Thomas, and Sperling), and simultaneous interpenetrating networks (Frisch, Klempner, Frisch, and Ghiradella). Most polymer blends, grafts, and blocks exhibit two phases. The theory of microdomain structure was discussed (Helfand). The different ways that the two molecules can be joined together was examined (Kenney), and their topology was explored (Sperling). |
Contents
AN INTRODUCTION TO THE SYNTHESIS OF BLOCK | 5 |
y Diazo Groups | 24 |
Invited paper This chapter was not presented | 56 |
Copyright | |
19 other sections not shown
Other editions - View all
Common terms and phrases
ABCPs acetone alkylaluminum anionic backbone behavior Block and Graft block copolymer BP-III branches butadiene CH₂ chain Chem chemical chlorine coinitiator component composition containing copolymerization crosslink density crosslinked crystalline degradation domains elastomers elongation Et,Al Et₂ Alc1 Extruded fraction glass transition temperature graft copolymers grafting efficiency groups hard segments homopolymer homopolystyrene impact strength increase infrared interphase IPN's kg/cm² linear Macromol materials Matzner melt methyl methacrylate methyl styrene modulus molded mole molecular weight molecules monomer morphology networks obtained orientation parameters phase separation plastic PMMA poly polyblend polybutadiene polymer blends Polymer Sci polymer systems polystyrene polystyrene content polyurethane prepared prepolymer present produce PVTCA radicals random copolymer reaction resin rubber samples SB block polymers semi-IPN's sequence sequential copolymers shear Shear Modulus shown in Figure solubility solution solvent structure styrene styrene conversion surface synthesis Table technique tensile strength thermoplastic thermoplastic elastomers tion urethane