Polymer Chemistry, Journal Year: 2018, Volume and Issue: 9(33), P. 4332 - 4342
Published: Jan. 1, 2018
Phenylhydrazine is an effective modifier for conventional ATRP syntheses, providing systematic control over the dispersity of polymers with unimodal molecular weight distributions.
Language: Английский
Chemical Science, Journal Year: 2022, Volume and Issue: 13(22), P. 6541 - 6549
Published: Jan. 1, 2022
Along-wavelength emissive Ru( ii ) metallacycle chemo-phototheranostic was prepared via self-assembly that exhibits excellent photostability, deep-tissue penetration capability, and promising chemo-phototherapeutic performance in vitro vivo .
Language: Английский
Citations
69
Angewandte Chemie International Edition, Journal Year: 2021, Volume and Issue: 60(35), P. 19383 - 19388
Published: June 16, 2021
The breadth and the shape of molecular weight distributions can significantly influence fundamental polymer properties that are critical for various applications. However, current approaches require extensive synthesis multiple polymers, limited in dispersity precision typically incapable simultaneously controlling both distributions. Here we report a simplified approach, whereby on mixing two polymers (one high Đ one low Đ), any intermediate value be obtained (e.g. from 1.08 to 1.84). Unrivalled is achieved, with values even nearest 0.01 1.37→1.38→1.39→1.40→1.41→1.42→1.43→1.44→1.45), while maintaining fairly monomodal This approach was also employed control obtain diblock copolymers accuracy. straightforward nature our methodology alongside its compatibility wide range polymerisation protocols ATRP, RAFT), expands toolbox tailored polymeric materials makes them accessible all researchers.
Language: Английский
Citations
62
Macromolecules, Journal Year: 2022, Volume and Issue: 55(22), P. 10052 - 10061
Published: Nov. 2, 2022
Dynamic networks couple the robust nature of thermosets with shapeability and recyclability thermoplastics. Though a wealth exchange chemistries can be leveraged to fabricate dynamic networks, reversibly cross-linked systems that are comprised primarily chains nonexchangeable backbones increase network complexity render flow behavior difficult predict. Here, we report polymethacrylate-based vitrimers prepared by cross-linking β-ketoester-containing polymers multifunctional amines demonstrate molecular weight dispersity primary tuned actively tailor dynamics resulting networks. Vitrimers similar composition cross-link density made from below well above entanglement exhibited distinct viscoelastic properties energies activation ranging 93 264 kJ/mol. Resistance creep increased dramatically increasing chain length. Finally, blending prepolymers skew Mn above/below Me was demonstrated, showing distinguishable effect prepolymer breadth skewness on vitrimer flow. Our results suggest tailoring chain-length distribution is viable strategy design materials predictable customizable behavior.
Language: Английский
Citations
51
Journal of Material Science and Technology, Journal Year: 2024, Volume and Issue: unknown
Published: Dec. 1, 2024
Language: Английский
Citations
17
Angewandte Chemie International Edition, Journal Year: 2019, Volume and Issue: 58(17), P. 5598 - 5603
Published: Feb. 20, 2019
Molecular weight distribution of polymers, termed dispersity (Đ), is a fundamental parameter for determining polymer material properties. This paper reports novel approach controlling Đ by exploiting temperature-selective radical generation in organocatalyzed living polymerization. The polymers with tailored were synthesized batch system without the assistance an external pump. A unique aspect this that was tuneable from 1.11 to 1.50 any segment diblock, triblock, and multiblock copolymers form star brush segmental or topological restriction. amenable various monomers free metals thus attractive applications. also generated brushes on surfaces Đ. An interesting finding exhibited interaction molecules, depending value.
Language: Английский
Citations
74
ACS Macro Letters, Journal Year: 2018, Volume and Issue: 7(6), P. 677 - 682
Published: May 24, 2018
The molecular weight distributions (MWDs) of block copolymers significantly impact their morphological phase behavior, but exploiting these features as a means to tune material properties has been limited the MWD breadth, or dispersity (Đ). Manipulation entire promising potential address this challenge by providing convenient and versatile route toward tailoring polymer nanostructure. Herein, we describe self-assembly poly(styrene)-block-poly(2-vinylpyridine) (PS-b-P2VP) where PS blocks have systematically deviating compositions weights. We find that controlling shape, breadth skew, afforded access different morphologies in samples with same characteristics, including Đ. As such, illustrate generality effectiveness strategy anticipate it will facilitate increased deployment disperse advanced materials applications.
Language: Английский
Citations
71
Polymer Chemistry, Journal Year: 2020, Volume and Issue: 11(35), P. 5559 - 5571
Published: Jan. 1, 2020
The
development
and
applications
of
an
organocatalyzed
living
radical
polymerization
Language: Английский
Citations
60
Polymer Chemistry, Journal Year: 2019, Volume and Issue: 11(2), P. 326 - 336
Published: June 13, 2019
Polymer molecular weight distributions are targeted through kinetic modeled with high fidelity based on the temporal control of chain initiation in anionic polymerizations.
Language: Английский
Citations
57
Polymer Chemistry, Journal Year: 2019, Volume and Issue: 10(46), P. 6315 - 6323
Published: Jan. 1, 2019
Automated synthesis by mixing of individual polymer distributions to tune the shape and properties artificial molecular weight distributions.
Language: Английский
Citations
57
Macromolecules, Journal Year: 2020, Volume and Issue: 53(17), P. 7479 - 7486
Published: Aug. 24, 2020
Thermoplastic elastomers (TPEs) based on polystyrene (PS) are commonplace in society. The elastomeric properties of these materials often sacrificed to increase mechanical such as stiffness, strength, and toughness. We sought produce stiff, strong, tough TPEs that retain their by shifting the lamellar phase boundary toward higher PS content. By precisely controlling molecular weight distribution (MWD) shape one block polystyrene-block-polyisoprene-block-polystyrene (SIS), we produced continuous at atypically high volume fractions, from 0.33 triblocks with a narrow MWD ∼0.39 broadened block. Furthermore, observed hexagonal/lamellar coexistence fraction 0.39 when first was asymmetric. These exhibit enhanced consistent fractions morphologies.
Language: Английский
Citations
57