The researchers' technique, which relies on self-organizing substances known as block copolymers
, was described this week in an article in Science.
The GTP polymer 1 is a commercial BYK product based on an AB block copolymer
, where A is a binder compatible block and B is a pigment affinic block based on ionic amine derivatives.
A key question in block copolymers
is the nature of interactions between blocks, as well as block interactions with different materials.
Noda suspects his block copolymer
molecule may be so large that the rubber can't swallow it.
The architectural polymers include bio-conjugated hybrid polymers with poly(-amino acid)s and gluco-polymers, star-branched and dendrimer-like hyperbranched polymers, cyclic polymers, dendrigraft polymers, rod-coil and helix-coil block copolymers
are introduced chapter by chapter in the book.
films can be used as a part of an assembly system in which nanoscale structures form when blocks of the copolymer phase separate into microdomains.
Segmented block copolymers
are multiblock copolymers with a continuous phase with a low [T.
In a block copolymer
solid, the different blocks of a block copolymer
segregate to yield equilibrium block segregation patterns that are highly regular and ordered with periodicity ranging from tens of nanometres to several hundred nanometres.
The web consists of a first and second layer with both layers comprising a hydrophilic block copolymer
of a polyether and another polymer selected from a group consisting of polyester, polyamide and polyurethane.
However, chemists can bond them together to produce what is known as a block copolymer
1 Phase-Selective Chemistry in Block Copolymer
Thermal degradation profile of hydroxyl terminated polybutadiene (HTPB)-based polyurethane and polyurethane-urea block copolymer
has been studied as a function of chain extender concentration.
Patent 8,491,965 (July 23, 2013), "Method of Controlling Orientation of Domains in Block Copolymer
Films," Joy Cheng, Ho-Cheol Kim, Daniel P.
Key statement: The present invention is directed to a process for preparing a polymer modified bituminous binder composition in the substantial absence of crosslinking agents by heating a bitumen component in a stirred tank to a temperature from 160[degrees]C to 221[degrees]C; adding a block copolymer
composition to the bitumen component while the bitumen component is being stirred to form a homogeneous mixture of the bitumen component and the block copolymer
composition; and continuing to stir the homogeneous mixture while maintaining the temperature from 180[degrees]C to 221[degrees]C for a total period of time from four hours to 30 hours, thereby forming a cured polymer modified bituminous binder composition.
On the other hand, two immiscible constituents can be chemically linked together to form a block copolymer
with fine uniform microdomains of several tens of nanometers, which is explicitly smaller than the domain size in polymer blends (usually in the order of 1 [micro]m).