Block Polymers: Proceedings of the Symposium on Block Polymers at the Meeting of the American Chemical Society in New York City in September 1969S. L. Aggarwal Block polymers represent another milestone in the preparation of polymers of controlled structure. Catalysts and polymerization methods that allowed the preparation of polymers in which the stereo- and geometric isomerism of the monomer units could be con trolled have indeed been among the major developments in polymer science during the last decade. The synthesis of block polymers, in which the sequence length of the comonomer units can be con trolled, portends equally important developments in the science and technology of polymers. The papers collected in this volume cover primarily the pro ceedings of the most recent symposium on block polymers, sponsored by the Division of Polymer Chemistry of the American Chemical Society. It was held in New York City during the Society's 158th National Meeting in September, 1969. Additional contributions from selected authors were invited especially for this book to achieve the most up-to-date account of the advances that have been made since the development of the thermoplastic elastomers that first brought into focus this important area of research. The first two papers in this volume draw attention to the various problems that should be considered in the preparation of block polymers of precisely defined structure from styrene and butadiene or isoprene by anionic polymerization. Characterization of block polymers presents many problems and there is a paucity of systematic work in this area. Attention has been given to the di lute solution properties of block polymers,however, in one of the papers in this volume. |
Contents
1 | |
11 | |
Small Angle XRay Scattering Studies of TriBlock | 19 |
Relationship of Morphology to Physical Properties | 31 |
Multiple Glass Transitions of Block Polymers II | 43 |
Studies on Domain Formation Mechanism of AB Type | 53 |
Mechanical Properties of StyreneIsoprene Block Copolymers | 123 |
An AlphaMethylstyrene Isoprene Block Copolymer | 153 |
Synthesis and Properties of Siloxane Block Polymers | 237 |
An Electron Microscopical Study of the Morphology | 249 |
Structure and Properties of Alternating Block Polymers | 263 |
Preparation of Block Copolymers of Some Ethylenic | 277 |
Controlled Block Copolymerization of Tetrahydrofuran | 293 |
Polymerization of Cyclic Imino Ethers VIII Block | 313 |
Thermal Stability of Piperazine Block Copolymers | 321 |
333 | |
Other editions - View all
Block Polymers: Proceedings of the Symposium on Block Polymers at the ... S. L. Aggarwal No preview available - 2012 |
Common terms and phrases
anionic annealing BCMO behavior benzene BG copolymers block copolymers BPAC butadiene carbanions carbon catalyst chain Chem chemical chlorobenzene component composition concentration copolymerization crystalline crystallization curves decrease degree of polymerization diene domain structure elastomers electron ethylene oxide Figure formation fraction graft copolymers hard segment heating homopolymers increase initiation interactions isomerized isoprene Kraton lamellae lithium living ends matrix melting point micelle micrographs mixture modulus mole molecular weight molecules monomer morphology number average obtained peak phase separation phenyl ether plastic poly poly-BCMO poly-THF polybutadiene polycarbonate Polyether polyether-urethanes polyisoprene Polymer Sci polystyrene prepared propagation propylene sulfide random copolymer reaction room temperature rubber samples scattering segment size distribution shear shown shows siloxane soluble solution solvent specimens spectra spherical spherulitic strain stress stress-strain studies styrene styrene-butadiene synthesis Table tensile strength thermal THF polymerization THF-BCMO Tobolsky toluene triblock type block copolymer urethane values viscosity