Structure and Properties of Tapered Block Polymers of Styrene and Isoprene

Syndiospecific Living Block Copolymerization of Styrenic Monomers Containing Functional Groups, and Preparation of Syndiotactic Poly{(4-hydroxystyrene)-block-[(4-methylstyrene)-co-(4-hydroxystyrene)]}

“…Thus, a complete removal of the silyl protective group was achieved. [49] Consequently, the structure of the poly(4MS-co-HOST) segments of block copolymers in DMF/LiCl solvent is the quasi-stable state between a poorly solvated and well-solvated. It has been reported that there is a strong intermolecular association of the block copolymers in weakly selective solvents.…”

Effect of sequence dispersity on morphology of tapered diblock copolymers from molecular dynamics simulations

“…A major driver of interest in such systems is that, by adjusting the length of the tapered region, one can tune microphase behavior and physical properties such as glass transition temperature (T g ) and orderdisorder transition temperature (T ODT ), as has been found in experiments by multiple groups. [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17] As would be intuitively expected, adding a taper generally increases the miscibility of the system, effectively decreasing the segregation strength (quantified by χN, the Flory χ parameter times polymer length) and widens the interfacial regions of the microphase separated structures. Furthermore, tapering has been shown to change the microphase behavior and dynamics versus typical diblocks in ways that cannot be explained by a simple shift in effective segregation strength.…”

“…26 One way tapered copolymers can be formed experimentally is via a semi-batch process of many sequential living anionic polymerization steps; during each step the two different types of monomers are injected in different amounts and are polymerized approximately randomly. 4,5,16,[27][28][29][30][31][32] A very recent work showed an excellent agreement between tapered copolymer density profiles from experiment and fDFT (with a fixed sequence), 17 though comparisons between experiment and theory with respect to order-disorder transitions or dynamics have not been as specific and precise.…”

Block Copolymers in External Fields: Rheology, Flow‐Induced Phenomena, and Applications

“…Moreover they do not have to be pure homopolymers. Many block copolymers used in applications are gradient or tapered block copolymers whose composition varies gradually along the chain or the blocks from A-rich at one end to B-rich at the other end [12][13][14][15][16][17]. It is nearly impossible to list the huge variety of block copolymers that have been synthesized and investigated.…”