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Journal ArticleDOI

Recent advances on the structure–properties relationship of multiblock copolymers

14 Sep 2021-Journal of Polymer Science (John Wiley & Sons, Ltd)-Vol. 59, Iss: 21, pp 2405-2433
About: This article is published in Journal of Polymer Science.The article was published on 2021-09-14 and is currently open access. It has received 15 citations till now. The article focuses on the topics: Thermoplastic elastomer & Rubber elasticity.
Citations
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Journal ArticleDOI
TL;DR: Z1+ as discussed by the authors is the successor of the Z -and Z1 -codes for topological analyses of mono-and polydisperse entangled linear polymeric systems, in the presence or absence of confining surfaces or nano-inclusions.

5 citations

Journal ArticleDOI
TL;DR: In this article , a series of giant polymeric chains based on polyhedral oligomeric silsesquioxane nanoparticles with an exact block number, regio-configuration, and sequence were designed and prepared.
Abstract: The vastly expanding chemical and architectural parameter space of multiblock copolymers brings both opportunities and challenges for tailoring the structure and properties of a synthetic polymer. In this study, we reported a precise and concise multiblock model system to amplify the subtle structural variations and resolve the underlying phase principles. A series of giant polymeric chains based on polyhedral oligomeric silsesquioxane nanoparticles with an exact block number, regio-configuration, and sequence were designed and prepared. A close scrutiny of these sequence-/regio-isomers revealed that the interplay of geometric constraints, regio-configurations, and collective interactions dictates the self-assembled structures. Zigzag-packed lamellae with the layer normal perpendicular to the backbone were observed for the alternating chains, while a head-to-head arrangement with the lamellar normal along the chain direction was recognized in the case of block chains. Due to the geometric constraint, the alternating chains were exceedingly sensitive to the regio-regularity, leading to dramatically different phase stabilities. This work reveals the critical contribution of the block sequence and regio-configuration to phase behaviors, providing deeper insights toward rational structural engineering of multiblock copolymers.

4 citations

Journal ArticleDOI
TL;DR: In this paper , a stretchable semiconductor called PU(DPP)x was proposed by copolymerization of oligodiketopyrrolopyrrole-based conjugated block and hydrogenated polybutadiene flexible block via urethane linkage for intermolecular hydrogen bonding.
Abstract: Polymer semiconductors with large elastic recovery (ER) under high strain in thin film state are highly desirable for stretchable electronics. Here we report a type of stretchable semiconductor PU(DPP)x, by copolymerization of oligodiketopyrrolopyrrole-based conjugated block and hydrogenated polybutadiene flexible block via urethane linkage for intermolecular hydrogen bonding. By regulating block ratio, PU(DPP)35 with 35 wt % conjugated block exhibits high intrinsic ER > 80% under 175% strain (ε) in pseudo free-standing thin film state, comparable with commercial elastomers, and crack onset strain (COS) > 300% along with maximum hole mobility of 0.19 cm2 V-1 s-1 in organic thin film transistors to bring it to the best performing block copolymer-type stretchable semiconductors. Enhanced mobility is achieved using PU(DPP)35 as the binder for conjugated polymer PDPPT3. The 25 wt %-PDPPT3 blend displays mobility up to 1.28 cm2 V-1 s-1 along with COS ∼120%, and 10 wt %-PDPPT3 blend exhibits ER of 78% at ε = 150%, COS of ∼230%, modulus of 36.5 MPa, maximum mobility of 0.62 cm2 V-1 s-1 and no obvious degradation of mobility at ε = 150% after 100 cycles of strain. Moreover, the structural similarity enables the blend film uniform and stable microstructure against mechanical and thermal deformation. Notably, PU(DPP)35 and the blend are characterized by high mechanical performance similar to that of commercial elastomers in thin film state, and demonstrate their potential for high performance stretchable electronics.

3 citations

Journal ArticleDOI
TL;DR: In this article , a thermo-spun reaction encapsulation strategy is presented for fabricating a low-temperature tolerant and high fatigue-resistant fibrous ionic conductor.

3 citations

References
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Journal ArticleDOI
TL;DR: In this paper, a statistical treatment of high polymer solutions has been carried out on the basis of an idealized model, originally proposed by Meyer, which is analogous to the one ordinarily assumed in the derivation of the ''ideal'' solution laws for molecules of equal size.
Abstract: A statistical mechanical treatment of high polymer solutions has been carried out on the basis of an idealized model, originally proposed by Meyer, which is analogous to the one ordinarily assumed in the derivation of the ``ideal'' solution laws for molecules of equal size. There is obtained for the entropy of mixing of n solvent and N linear polymer molecules (originally disoriented), ΔS=−k[(n/β) ln v1+N ln v2] where v1 and v2 are volume fractions and β is the number of solvent molecules replaceable by a freely orienting segment of the polymer chain. This expression is similar in form to the classical expression for equal‐sized molecules, mole fractions having been replaced by volume fractions. When the disparity between the sizes of the two components is great, this expression gives entropies differing widely from the classical values, which accounts for the large deviations of high polymer solutions from ``ideal'' behavior. The entropy of disorientation of a perfectly arranged linear polymer is found t...

3,513 citations

Journal ArticleDOI
TL;DR: Block copolymers are macromolecules composed of sequences, or blocks, of chemically distinct repeat units that make possible the sequential addition of monomers to various carbanion-ter­ minated ("living") linear polymer chains.
Abstract: Block copolymers are macromolecules composed of sequences, or blocks, of chemically distinct repeat units. The development of this field originated with the discovery of termination-free anionic polymerization, which made possible the sequential addition of monomers to various carbanion-ter­ minated ("living") linear polymer chains. Polymerization of just two dis­ tinct monomer types (e.g. styrene and isoprene) leads to a class of materials referred to as AB block copolymers. Within this class, a variety of molec­ ular architectures is possible. For example, the simplest combination, obtained by the two-step anionic polymerization of A and B monomers, is an (A-B) dioblock copolymer. A three-step reaction provides for the preparation of (ABA) or (BAB) triblock copolymer. Alternatively, "living" diblock copolymers can be reacted with an n-functional coupling agent to produce (A-B)n star-block copolymers, where n = 2 constitutes a triblock copolymer. Several representative (A-B)n block copolymer architectures

3,475 citations

Journal ArticleDOI
TL;DR: In this article, an extensive molecular-dynamics simulation for a bead spring model of a melt of linear polymers is presented, where the number of monomers N covers the range from N=5 to N=400.
Abstract: We present an extensive molecular‐dynamics simulation for a bead spring model of a melt of linear polymers. The number of monomers N covers the range from N=5 to N=400. Since the entanglement length Ne is found to be approximately 35, our chains cover the crossover from the nonentangled to the entangled regime. The Rouse model provides an excellent description for short chains N

3,232 citations

Journal ArticleDOI
TL;DR: The Knitting Pattern as mentioned in this paper is a block copolymer that was discovered by Reimund Stadler and his coworkers and reflects a delicate free-energy minimization that is common to all blockcopolymer materials.
Abstract: Block copolymers are all around us, found in such products as upholstery foam, adhesive tape and asphalt additives. This class of macromolecules is produced by joining two or more chemically distinct polymer blocks, each a linear series of identical monomers, that may be thermodynamically incompatible (like oil and vinegar). Segregation of these blocks on the molecular scale (5–100 nm) can produce astonishingly complex nanostructures, such as the “knitting pattern” shown on the cover of this issue of PHYSICS TODAY. This striking pattern, discovered by Reimund Stadler and his coworkers, reflects a delicate free‐energy minimization that is common to all block copolymer materials.

2,824 citations

Journal ArticleDOI
Gary S. Grest1, Kurt Kremer1
TL;DR: An efficient and general algorithm for simulating polymers, which can be used for single, large chains as well as many-chain systems, and confirmed two theoretical results, namely the anomalous behavior of S(q) for rings and the ${t}^{0.54}$ power law for the motion of a monomer in a self-avoiding chain undergoing Rouse relaxation.
Abstract: We describe an efficient and general algorithm for simulating polymers, which can be used for single, large chains as well as many-chain systems. It allows us to distinguish solvent effects from interchain effects on the dynamics of the chains. The method is tested for linear and cyclic chains of 50 to 200 monomers. We have confirmed two theoretical results which have not been observed numerically or experimentally, namely the anomalous behavior of S(q) for rings and the ${t}^{0.54}$ power law for the motion of a monomer in a self-avoiding chain undergoing Rouse relaxation.

1,548 citations