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US 9,957,383 B2Granted
Brush block copolymer infrared 1-D photonic crystals using linear polymer additives
AssigneeCalifornia Institute of Technology
InventorsRobert J. MacFarlane, Robert H. Grubbs
Life of this patent
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Abstract
The present invention is directed to brush block copolymer compositions comprising first and second homopolymers or random copolymers whose presence provides access to photonic bandgaps in the infrared frequency range, their use in this capacity, and methods of making the same. The specific parameters associated with these compositions are described within the specification.
Claims23
A composition comprising:
- (a) a brush block copolymer comprising a backbone and pendant polymer arms,
- (i) the brush block copolymer having an overall weight averaged molecular weight in a range of from about 800 kDa to about 5000 kDa, and having a polydispersity index (PDI) in a range of from about 1 to about 1.2;
- (ii) the block copolymer comprising a first and a second block copolymer moiety, the first block copolymer moiety comprising a first pendant polymer arm and the second block copolymer moiety comprising a second pendant polymer arm, the first and the second block copolymer moieties being present in a ratio of molecular weights in a range of from about 56:44 to about 44:56;
- (iii) the first and the second pendant polymer arms each comprising different repeating monomer units, each arm independently having a degree of polymerization (DP) in a range of from about 20 to about 200 and a polydispersity index in range of from about 1 to about 1.2;
- (b) a first linear polymer having a weight averaged molecular weight in a range of from about 1 kDa to about 20 kDa and comprising the same repeating monomer units as present in the first pendant polymer arm;
- (c) a second linear polymer having a weight averaged molecular weight in a range of from about 1 kDa to about 20 kDa and comprising the same repeating monomer units as present in the second pendant polymer arm,
- wherein the repeating monomer units in the first and the second polymers are independently optionally functionalized with an alkoxy, alkoxycarboxy, alkyl, amino, aryl, azido, carboxylato, cyano, halo, hydroxy, hydroxycarboxy, nitro, phosphino, or thiol;
- wherein the first and the second polymers are present, with respect to each other, in a weight ratio of from about 56:44 to about 44:56;
- and
- wherein the first and the second polymers are together present, with respect to the brush block copolymer, in a weight ratio of from about 2:98 to about 80:20.
7 more elements
Dependencies are inferred from the claim text.