Solid-state morphologies of linear and bottlebrush-shaped polystyrene–poly(Z-l-lysine) block copolymers

Preparation and Supramolecular Self-Assembly of a Polypeptide-block-polypseudorotaxane

“…[37][38][39][40] The stacking arrangement of the helices can be explained by a favorable close-packing of the polypseudorotaxane. The stacking arrangement can also be revealed from the geometrical factor γ ) (8 × 10 21 /πN A )(M n /Fdd H 2 ) obtained by dividing the molecular volume by the average lateral extension of a chain (d/2; interface area per chain) and the cross section of a helix (d H 2 π/4), 41 where l H is the maximum length of a poly(γ-benzyl-L-glutamate) R-helix, d H the spacing between helices, and d the intersheet spacing. 41 As illustrated in Scheme 2, stacked helices give γ ) 1, whereas interdigitated or folded helices reveal two unit areas per chain or γ ) 2.…”

“…11,12 When compared with most of the rod-coil type polymers that have been investigated so far, these peptide-based diblock copolymers possess a few unique features. [13][14][15][16][17] For example, the conformation of the polypeptide rod segment can be manipulated reversibly under the action of appropriate external stimuli; in addition, the self-assembly of these molecules is also driven by directed hydrogen-bonding interactions. Peptides of poly(γ-benzyl-L-glutamate) (PBLG) are typical helical polypeptides having a stiff rigid-rod structure that exhibits thermotropic and lyotropic liquid-crystalline properties.…”

Patterning with block copolymer thin films

“…These also exhibit shear thinning rheological behavior and rapid recovery after the cessation of shear and can be built with specific biofunctionality [76]. Potentially, solid-state self-assembly, similar to that used in traditional block copolymers, could be used to form ordered materials useful as fibers, elastomers or stimuli responsive materials [77][78][79]. A broad discussion of the self-assembly and potential applications of this important class of block copolymers is beyond the scope of this review, though several other interesting reviews focused on this subject have been recently published [71,72,75].…”

Assembled Structures and Chiroptical Properties of Amphiphilic Block Copolymers Synthesized by RAFT Polymerization of N‐Acryloyl‐L‐alanine

“…[10][11][12][13][14][15] The nature of the amino acid, chirality, and amphiphilicity encoded in the primary structures play crucial roles in determining their ordered structures and various functions of the amino acid-based block copolymers. In addition to block copolymers obtained by the ring-opening polymerization of a-amino acid anhydrides with synthetic macroinitiators, [11][12][13][14][15] much attention has recently been paid to developing novel amino acid-based block copolymers using controlled radical polymerization techniques.…”

“…[10][11][12][13][14][15] The nature of the amino acid, chirality, and amphiphilicity encoded in the primary structures play crucial roles in determining their ordered structures and various functions of the amino acid-based block copolymers. In addition to block copolymers obtained by the ring-opening polymerization of a-amino acid anhydrides with synthetic macroinitiators, [11][12][13][14][15] much attention has recently been paid to developing novel amino acid-based block copolymers using controlled radical polymerization techniques. [10] Atom transfer radical polymerization, [16][17][18][19][20][21][22] nitroxide-mediated radical polymerization, [23,24] and reversible addition-fragmentation chain transfer (RAFT) polymerization [25][26][27][28][29][30][31][32][33][34][35] were employed for the synthesis of a variety of peptide-polymer hybrids having well-defined structures and characteristic properties.…”