Article
Polymer Science
Hongyuan Bai, Li Han, Xuefei Wang, Hong Yan, Haitao Leng, Siwei Chen, Hongwei Ma
Summary: In this study, a strategy to synthesize unique C7 and C8 skeleton polymers through living anionic polymerization was proposed. The polymerization behavior of two diene monomers with high ring strain substituents was investigated. It was found that the content of C4 and C7/C8 skeleton structures in the chain can be controlled by adjusting the mode of monomer additions.
Article
Polymer Science
Mohammed Alaboalirat, Samantha J. Scannelli, Hadi Rahmaninejad, Jan-Michael Carrillo, Changwoo Do, John B. Matson, Rana Ashkar
Summary: Bottlebrush polymers are a unique class of macromolecular architectures with diverse applications that depend on their shape and size. This study systematically analyzed the structural and conformational properties of bottlebrush polymers using experimental and computational methods, providing key parameters and validating mean field theories.
Article
Chemistry, Multidisciplinary
Federica Sbordone, Juliet Veskova, Bailey Richardson, Phuong Thi Do, Aaron Micallef, Hendrik Frisch
Summary: Biopolymers, such as proteins and nucleic acids, are essential for life, while synthetic polymers have greatly impacted our everyday lives. By combining the functionality of biopolymers with the versatility of synthetic polymers, it is possible to create materials with tailored properties for various applications. However, traditional radical polymerization typically yields non-functional all-carbon backbones, limiting the incorporation of natural polymers into synthetic polymers. In this study, we developed a solid-phase peptide synthesis approach to generate synthetic peptide conjugates that can be readily copolymerized with synthetic comonomers, allowing for the incorporation of defined peptide sequences into the main chain of synthetic polymers. This strategy is compatible with all 20 standard amino acids and uses commonly available chemicals, making it suitable for widespread application.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Federica Sbordone, Juliet Veskova, Bailey Richardson, Phuong Thi Do, Aaron Micallef, Hendrik Frisch
Summary: Biopolymers, such as proteins and nucleic acids, are crucial to life, while synthetic polymers have greatly impacted our daily lives due to their accessibility. By combining the functionality of biopolymers with the durability of synthetic polymers, it is possible to create materials that can be customized for various applications.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Phong K. Quach, Jesse H. Hsu, Ivan Keresztes, Brett P. Fors, Tristan H. Lambert
Summary: The ring-opening metathesis polymerization of cyclopropenes using hydrazonium initiators was investigated. The initiators, formed by condensing 2,3-diazabicyclo[2.2.2]octane and an aldehyde, polymerize cyclopropene monomers through a sequence of [3+2] cycloaddition and cycloreversion reactions. The study showed that the monomer to initiator ratio had a positive correlation with the degree of polymerization.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Polymer Science
Digvijayee Pal, John B. Garrison, Zhihui Miao, Lily E. Diodati, Adam S. Veige, Brent S. Sumerlin
Summary: Cyclic bottlebrush polymers were synthesized utilizing ring-expansion polymerization (REP) and subsequent grafting-from via atom-transfer radical polymerization (ATRP). Their self-assembly behavior in water was investigated, revealing a two-step morphological transformation from spheres to porous spheres to nanobowls. The propensity for shape transformation was influenced by changes in internal viscosity during solvent exchange, as well as the rate of solvent exchange.
Article
Polymer Science
Masato Kawamoto, Yasuyuki Mori, Akihiko Tsuge, Takeshi Endo
Summary: In this study, the anionic ring-opening polymerization (ROP) behavior of trans-cyclohexene carbonate (CHC) using metal alkoxides as initiators was investigated. The results showed that the ROP process could be controlled under low temperature, high monomer concentration, and appropriate feed ratio conditions, while side reactions were suppressed.
JOURNAL OF POLYMER SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Cuihong Ma, Ying Quan, Ruyi Sun, Wei Song, Xiaojuan Liao, Meiran Xie
Summary: Conjugated polyacetylene-based monocyclic and bicyclic polymers were synthesized using blocking-cyclization metathesis polymerization method. The cyclic polymers were fully characterized and shown to have good photoelectric properties. The molecular topology of the designed cyclic polymers could be directly observed without tedious post-modification treatment.
CHEMICAL COMMUNICATIONS
(2022)
Article
Polymer Science
William R. Archer, Grace E. Dinges, Piper L. MacNicol, Michael D. Schulz
Summary: In this study, bottlebrush polymers with polyaziridine brushes and a polynorbornene backbone were synthesized by a grafting-through approach. Dynamic light scattering (DLS) was used to investigate the aggregation behavior of macromonomers and the growth of bottlebrush chains during the polymerization process.
Article
Chemistry, Physical
Tianyuan Pan, Sarit Dutta, Yash Kamble, Bijal B. Patel, Matthew A. Wade, Simon A. Rogers, Ying Diao, Damien Guironnet, Charles E. Sing
Summary: Highly branched bottlebrush polymers, with unique properties and versatile applications, have emerged as a promising class of macromolecules. The integration of synthesis, characterization, processing, and modeling in materials design has provided insights for molecular engineering of these materials. Future development is expected to showcase novel material properties in different states.
CHEMISTRY OF MATERIALS
(2022)
Article
Polymer Science
Harry W. Gibson, Mason A. Rouser, Daniel Schoonover
Summary: A new method for synthesizing bottlebrush copolymers is introduced using crown ether-containing polyester and viologen in styrene solution, which allows for control over the structure and composition of the resulting polymers.
Article
Polymer Science
Brandon R. Clarke, Gregory N. Tew
Summary: This article reports a method to overcome crosslinking in commercial poly(ethylene glycol) (PEG) caused by diol impurities, allowing for good control over the molecular weight of bottlebrush polymers. PEG-based bottlebrush networks were successfully synthesized through ring-opening metathesis polymerization, achieving high conversions and low sol fractions (<2%). The crystallinity and mechanical properties of these networks were further modified by solvent swelling. The synthesis methods highlighted in this study demonstrate the potential of bottlebrush network architecture in the rational design of new materials.
JOURNAL OF POLYMER SCIENCE
(2022)
Article
Engineering, Environmental
Kerui Chen, Wenjian Han, Xin Hu, Yihuan Liu, Yujing Hu, Shuangfei Zhao, Ning Zhu, Zheng Fang, Kai Guo
Summary: A microreactor-based enzymatic and metal-catalytic cascade reaction platform was developed for the synthesis of bottlebrush polymers. By using a continuous flow chemo-enzymatic strategy, well-defined bottlebrush polymers with fast kinetics and narrow molecular weight distribution were successfully prepared.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Polymer Science
Qamar un Nisa, William Theobald, Kyle S. Hepburn, Ian Riddlestone, Nathaniel M. Bingham, Maciej Kopec, Peter J. Roth
Summary: Polymers with tailored architectures and degradability were successfully prepared using thiocarbonyl addition ring-opening polymerization method. High polymer quality and high degradability were achieved by selecting appropriate reaction solvents and anhydrous conditions. Water-soluble molecular brushes were successfully synthesized by taking into consideration the copolymerization kinetics.
Article
Polymer Science
Qamar Un Nisa, William Theobald, Kyle S. Hepburn, Ian Riddlestone, Nathaniel M. Bingham, Maciej Kopec, Peter J. Roth
Summary: In this study, polymers with tailored architectures and degradability were prepared using TARO ATRP. By using appropriate solvents and anhydrous polymerization conditions, degradable copolymers with high thioester content were obtained. Water-soluble molecular brushes were also prepared by adjusting the copolymerization kinetics.
Article
Nanoscience & Nanotechnology
Joseph Jang, Do-Hyung Kim, Byeol Kang, Joo-Hyoung Lee, Chanho Pak, Jae-Suk Lee
Summary: The influence of N-substituent and pK(a) of azole rings on the performance of high-temperature polymer electrolyte membrane fuel cells (HT-PEMFCs) was investigated. Experimental comparisons of membranes with four different azole substituents showed that methyl-substituted azole membranes had higher phosphoric acid doping levels, while unsubstituted azole membranes more effectively improved proton conductivity.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Materials Science, Multidisciplinary
Yadagiri L. N. K. Mallela, Se Young Jeong, Santosh Kumar, Jae-Suk Lee
Summary: Silica nanoparticles with hyperbranched polyglycidol (hbP) grafts were synthesized and their ionic conductivity was enhanced by end functionalization with a nitrile group. Among the different batches of hbPs, the 6th-batch CN-hbP-SiO2 nanoparticles showed the best ionic conductivity when blended with PEO.
MACROMOLECULAR MATERIALS AND ENGINEERING
(2021)
Article
Chemistry, Multidisciplinary
In Gyu Bak, Chi-Ho Heo, Malcolm A. Kelland, Eunji Lee, Beom-Goo Kang, Jae-Suk Lee
Summary: In this study, a water-soluble polymer P(DETPIC-ran-HIC) was prepared for inhibiting the formation of hydrates, showing better performance than the polyamide polymer PVP in experimental tests for tetrahydrofuran (THF) clathrate hydrate crystal growth inhibition.
Article
Electrochemistry
Zubair Ahmad, Won-Bin Kim, Sachin Kumar, Tae-Ho Yoon, Jae-Jin Shim, Jae-Suk Lee
Summary: An ordered redox-active polymer composite was prepared and showed high specific surface area and excellent capacity retention, making it a potential active material for electrochemical energy storage systems.
ELECTROCHIMICA ACTA
(2022)
Article
Polymer Science
In Gyu Bak, Chang-Geun Chae, Jae-Suk Lee
Summary: This Perspective includes 208 references to describe various helical polymers, particularly polyisocyanates. The interest in polyisocyanates with helical properties is driven by various synthesis methods and kinetic studies on the living characteristics of isocyanate polymerization. The rigid-rod structures of polyisocyanates generate specific morphologies of block copolymers, and chiral studies of polyisocyanates have also been conducted.
Article
Polymer Science
Chang-Geun Chae, Jun Woo Park, Linh N. T. Ho, Myung-Jin Kim, Eun Chae Kim, Woohwa Lee, Sungmin Park, Dong-Gyun Kim, Hyun Min Jung, Yong Seok Kim
Summary: A series of novel nickel coordination catalysts were synthesized for the copolymerization of norbornene and methyl 5-norbornene-2-carboxylate, achieving precise control over the properties of the copolymers.
Article
Nanoscience & Nanotechnology
Yong-Guen Yu, Joo Hwan Ko, Jong Hyun An, Beom-Goo Kang, Young Min Song, Jae-Suk Lee
Summary: A facile approach for improving color purity is explored by introducing an angle-robust selective absorber (ARSA) into bottlebrush block copolymer (BBCP)-based one-dimensional (1D) photonic crystals (PCs). The synthesis of BBCPs with ultrahigh molecular weights and low dispersities allows for the fabrication of 1D PCs with different periodicities, resulting in full color-generation. Optical simulation and experimental results verify the enhancement of color saturation, even at various incident angles.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Multidisciplinary
In Gyu Bak, Chang-Guen Chae, Jieun Choi, Woo-Young Song, Jiwon Seo, Eunji Lee, Jae-Suk Lee
Summary: The amphiphilic conformation of alpha-helical peptides, with important biological functions, can be mimicked by alternating polyisocyanate copolymers. The benzyl group of SMBIC and the alkene group of AIC play crucial roles in the alternating copolymerization process, resulting in copolymers with controlled molecular weight and narrow dispersity. N-P(AIC-alt-SMBIC)s were synthesized from thiol-ene radical addition with P(AIC-alt-SMBIC).
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Polymer Science
Hongbo Feng, Chang-Geun Chae, Christopher Eom, Gordon S. W. Craig, Stuart J. Rowan, Paul F. Nealey
Summary: Modification of a block copolymer using click chemistry has been shown to effectively control the properties of the copolymer. This study focuses on the modification of a glycidyl methacrylate block with amine-epoxy click chemistry to generate a series of block-random copolymers. The dependence of the effective interaction parameter and surface energy difference on the ratio of the more polar amine is determined, and a lamellae-forming copolymer with sub-10 nm features and zero surface energy difference is demonstrated. Different morphologies can be achieved by adjusting the ratio of the polar amine using this method.
Article
Chemistry, Multidisciplinary
Gamal M. Nassar, Jeyon Chung, Cuc Kim Trinh, Ashraf A. El-Shehawy, Ahmed A. El-Barbary, Youngjong Kang, Jae-Suk Lee
Summary: Three homopolymers were synthesized via direct CH-CH arylation polymerization, resulting in highly purified polymers with high molecular weights. These polymers, considered as electron-withdrawing units, showed band gaps in a certain range and exhibited potential as electron acceptors in solar cell applications.
Article
Chemistry, Multidisciplinary
Cuc Kim Trinh, Jin Woo Choi, Thien Khanh Tran, Zubair Ahmad, Jae-Suk Lee
Summary: The effects of different crosslinkers on the arrangement of crystalline structures were studied using X-ray diffraction and high-voltage electron microscopy. Among the three crosslinkers, 1,4-diaminobutane showed the best performance in enhancing hole mobility and long-range order of crystal structure.
Article
Polymer Science
Wonbin Kim, Zubair Ahmad, Hong-Joon Lee, Seung Jo Yoo, Jae-Jin Shim, Jae-Suk Lee
Summary: The novel polymer nanocomposite introduced anthraquinone as a linker, forming a unique crystal structure with complementary electrical properties. This composite material shows promising applications in the field of energy as a next-generation material.
Article
Chemistry, Multidisciplinary
Minhu Huang, Seung Joon Yoo, Jae-Suk Lee, Tae-Ho Yoon
Summary: Activated carbon xerogel monoliths were prepared through a series of processes including hydrothermal polycondensation, pyrolysis, and activation, leading to materials with high specific surface area and interconnected pore structure. The samples exhibited excellent electrochemical properties, with the highest specific capacitance of 323 F g(-1) obtained under specific conditions.
