Block Copolymers

Block Copolymers

 

polymers having macromolecules in which comparatively long sequences of the links of one monomer (blocks) alternate with blocks of another monomer. The macromolecule of a block copolymer may be represented schematically in the form ~ AAAABBBB . . . BBBAAAAA ~, where A and B are monomer links of a different chemical nature.

References in periodicals archive ?
As the author has sought to present the "zeitgeist" of this subject, his text is concerned with experiments and theory on the thermodynamics and dynamics of block copolymers in melt, solution, and solid states in polymer blends.
The distribution center includes storage and distribution capabilities for Kraton unhydrogenated and hydrogenated styrenic block copolymers and polyisoprene products.
Malenfant said, "Drawing from recent developments in the literature, we were able to develop a robust synthesis of well-defined block copolymers that doesn't require stringent atmospheric conditions and that readily assemble into ordered nanostructures upon solvent evaporation.
Infuse olefin block copolymers (OBCs) feature a block architecture that is said to deliver enhanced performance and processing properties beyond current olefin elastomers, including outstanding high temperature performance, faster set-up in processing (reduced cycle times), improved abrasion resistance and excellent elasticity and compression set properties, both at room and elevated temperatures.
Akron, Ohio, reportedly shows significantly better scratch, abrasion, stain, and chemical resistance than standard TPVs and styrenic block copolymers.
Although polyurethane elastomers with nonpolar hydrocarbon soft segments show inferior properties compared with conventional polyurethane block copolymers, they are ideal systems for following the structure-property relations existing in this group of materials (1-9).
Tradenamed Telcar OBC, the TPO compounds are blends of a rigid polyolefin and Infuse olefin block copolymers (OBC) from Dow.
A new family of acrylic block copolymers is said to be easily mixed into nanoscale dispersions with various thermoplastics, thermosets, and elastomers--and to be miscible with those matrix polymers.
Physical, mechanical and thermal properties of a new class of isobutylene based model block copolymers are studied and contrasted with those of traditional thermoplastic elastomers based on polydienes and saturated polydienes (polyolefins) such as Kraton (or Vector) and Kraton G block copolymers.
Graft or block copolymers having polystyrene blocks and soft rubber blocks have been reported to be effective as compatibilizers.
Various authors (1-6) have described the synthesis of block copolymers by polymerization of [epsilon]-caprolactam in the presence of isocyanate-terminated poly(propylene oxide) and poly(butadiene) polymeric activators.
Professor Hamley has (co)written four books (Block Copolymers in Solution, Nanoscale Science and Technology, Developments in Block Copolymer Science and Technology, and Introduction to Soft Matter) and one for OUP entitled The Physics of Block Copolymers.