Article
Polymer Science
Hamin Kim, Raita Goseki, Takashi Ishizone
Summary: In this study, a new AB-type difunctional monomer was used for polymerization to obtain polymers with predicted molecular weights and narrow molecular weight distributions. The carbon-carbon double bonds in the monomer were found to be alternately consumed, leading to the formation of a polymer with unsaturated units in the main chain. This unique reaction mechanism is referred to as self-alternating polymerization.
Article
Chemistry, Multidisciplinary
Yiye Lu, Geoffrey W. Coates
Summary: Poly(lactic-co-glycolic acid) (PLGA) is a biodegradable and biocompatible polymer used in biomedical applications. This study presents a method for synthesizing syndioenriched, alternating PLGA from racemic methyl-glycolide with the use of an optimized racemic aluminum catalyst. The resulting material has a high degree of alternation in copolymer sequence and moderate syndiotacticity, and is amorphous, making it suitable for drug complexation.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Yiye Lu, Geoffrey W. Coates
Summary: Poly(lactic-co-glycolic acid) (PLGA) is widely used in various biomedical applications due to its biodegradability and biocompatibility. This study successfully developed a method to synthesize syndioenriched, alternating PLGA from racemic methyl-glycolide (rac-MeG), and confirmed the high degree of alternation of the comonomer sequence and moderate syndiotacticity within the polymer backbone stereoconfiguration through NMR investigations.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Polymer Science
Ekaterina Kostyurina, Judith U. De Mel, Alexandra Vasilyeva, Margarita Kruteva, Henrich Frielinghaus, Martin Dulle, Lester Barnsley, Stephan Foerster, Gerald J. Schneider, Ralf Biehl, Juergen Allgaier
Summary: Amphiphilic polymers exhibit diverse self-assembly behaviors in aqueous solutions. The solution properties and self-assembly morphologies, including single chains, micelles, gels, and ordered liquid crystals, can be systematically tuned by adjusting the lengths of the hydrophilic and hydrophobic building blocks.
Article
Polymer Science
Francis O. Boadi, Nicole S. Sampson
Summary: Bicyclo[4.2.0]oct-6-ene-7-carboxamide can form an alternating copolymer with cyclohexene in the presence of N-heterocyclic carbene-ruthenium catalyst. By creating a gradient copolymer with two different monomers, specific surface hydrophobicity, topology, and thermal properties can be controlled.
Article
Chemistry, Multidisciplinary
Kazuki Takahata, Naoki Aizawa, Masashi Nagao, Satoshi Uchida, Raita Goseki, Takashi Ishizone
Summary: The study established a 1:1 addition reaction to regulate the sequence of vinyl compounds by enhancing the electrophilicity of DPE derivatives. By sequentially reacting two or three DPE derivatives in increasing order of their electrophilicity, well-defined sequence-controlled polystyrenes were successfully synthesized in a single reaction.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Polymer Science
Dingfeng Shen, Yuan Yao, Qixin Zhuang, Shaoliang Lin
Summary: The study focuses on the design and synthesis of mainchain azopolymers for fast photo-induced reversible transitions, exhibiting distinct photo-switchable characteristics such as fast and effective trans to cis isomerization. This research provides insights into designing smart polymer materials with specific topology structures.
Article
Polymer Science
Hongyuan Bai, Li Han, Chao Li, Songbo Zhang, Xuefei Wang, Yu Yin, Xiaolu Zhang, Hongwei Ma
Summary: This study introduced a novel alternating copolymerization system that achieves ideal copolymerization kinetics by alternating two polymerization mechanisms. It was shown that the sequence distributions of DPE units can be regulated through terpolymerization with CPVB, allowing for different distributions of DPE and DPE derivative units in the chain. This research promotes and inspires alternating copolymerization in the field of polymer chemistry.
Article
Chemistry, Multidisciplinary
Kuo-Hsiu Huang, Huai-Hsuan Liu, Kuang-Yi Cheng, Chia-Lin Tsai, Yen-Ju Cheng
Summary: In this study, a new class of alternating block conjugated copolymers was developed, consisting of two alternating copolymers. Three sequence-controlled polychalcogenophenes were prepared by adding two different Grignard monomers in sequence, and their molecular weight, dispersity, and main-chain sequence can be synthetically controlled. The optical and electrochemical properties of the polymers can be systematically tuned, and they can be applied for bromine detection.
Article
Chemistry, Multidisciplinary
Fuqiang Liu, Wei Qu, Jie Zhang, Jun Liu, Qiongqiong Zhu, Ting Yue, Xiangmei Xu, Nan Ma, Junhui Ma, Yifan Sun, Yan Tang, Wei Zhang, Paul K. Chu
Summary: In this study, a cationic alternating copolymer with abundant carbon-carbon double bond functional groups was successfully grafted onto the surface of polyurethane, showing excellent antibacterial and antifouling properties. This flexible strategy has great potential for biomedical implants.
Article
Polymer Science
Mahir Mohammed, Bryn A. Jones, Paul Wilson
Summary: Aqueous electrochemical atom transfer radical polymerisation (eATRP) has been widely used in polymer synthesis due to its excellent control and high efficiency. By leveraging recent advances, a simplified current-controlled eATRP of acrylamides in water has been developed, enabling easier operation of polymerisation reactions through a single current profile.
Article
Polymer Science
Chao Chen, Yves Gnanou, Xiaoshuang Feng
Summary: The ring-opening copolymerization of epoxides with isothiocyanates was explored for the first time. Various epoxides were copolymerized with aromatic and aliphatic ITCs, and the effects of different phosphazene bases, temperatures, and Lewis acids on the copolymerization were investigated. The thermal properties of the obtained copolymers were analyzed.
Article
Chemistry, Multidisciplinary
Yuanqing Song, Chuandong Sun, Chenxu Tian, Hao Ming, Yanjun Wang, Wenkai Liu, Nan He, Xueling He, Mingming Ding, Jiehua Li, Feng Luo, Hong Tan, Qiang Fu
Summary: This study reports the precise synthesis of polyurethanes (PUs) with desired molecular weight, narrow molecular weight distribution, and controlled block sequences from commercially available monomers. The study also shows that the sequence order of functional segments in PUs affects the self-assembly behavior of nanocarriers and has an impact on protein absorption, cell internalization, biodistribution, and antitumor effect. These findings provide a versatile platform for the development of precise multiblock PUs and facilitate the clinical translation of PUs in biomedicine.
Article
Multidisciplinary Sciences
Lei Tao, John Byrnes, Vikas Varshney, Ying Li
Summary: Establishing the structure-property relationship is crucial for molecular design of copolymers. Machine learning models that consider both chemical composition and sequence distribution of monomers, and have the ability to process different types of copolymers, are needed. In this study, we propose four different machine learning models and find that a recurrent neural network (RNN) architecture that processes monomer sequence information in both forward and backward directions performs better for copolymers.
Article
Polymer Science
Hao Zhang, Zhou Zhou, Xiaofan Chen, Bo Yu, Zhenyang Luo, Xiang Li, Md Anisur Rahman, Ye Sha
Summary: Sequence-controlled organometallic polymers with side-chain metal functions such as ferrocene and ruthenocene have been prepared through regioselective ring-opening metathesis polymerization (ROMP). The properties of these polymers can be finely tailored by the metallocene sequence along the polymer chain, providing fundamental understanding of the structure-property relationship. This highly efficient chain-growth polymerization is expected to incorporate a variety of metal moieties into a single organometallic polymer for potential applications in electrochemical sensing, information processing, and magnetic materials.
Article
Chemistry, Physical
Jing Huang, Xu Zhou, Alexandros Lamprou, Fernando Maya, Frantisek Svec, S. Richard Turner
CHEMISTRY OF MATERIALS
(2015)
Article
Polymer Science
Xu Zhou, Jing Huang, Kevin W. Barr, Zhixing Lin, Fernando Maya, Lauren J. Abbott, Coray M. Colina, Frantisek Svec, S. Richard Turner
Article
Chemistry, Organic
Ting Hu, Hao Yan, Xingxing Liu, Chaoyang Wu, Yuxing Fan, Jing Huang, Guosheng Huang
Article
Polymer Science
Jing Huang, Xi Geng, Chong Peng, Tijana Z. Grove, S. Richard Turner
MACROMOLECULAR RAPID COMMUNICATIONS
(2018)
Review
Polymer Science
Jing Huang, S. Richard Turner
Article
Multidisciplinary Sciences
Shuang Zhao, Xin-Pei Wang, Jing-Fei Jiang, Yu-Shuang Chai, Yu Tian, Tian-Shi Feng, Yi Ding, Jing Huang, Fan Lei, Dong-Ming Xing, Li-Jun Du
Article
Polymer Science
Jing Huang, Jie Zhu, Samuel A. Snyder, Amanda J. Morris, S. Richard Turner
Article
Chemistry, Applied
Jing Huang, Xi Geng, Brian M. Tissue, S. Richard Turner
REACTIVE & FUNCTIONAL POLYMERS
(2018)
Article
Engineering, Chemical
Alice M. Savage, Xu Zhou, Jing Huang, S. R. Turner
APPLIED PETROCHEMICAL RESEARCH
(2015)
Article
Polymer Science
Yuanzhang Jiang, Xuyi Wang, Yanting Han, Dakai Gong, Yingchun Gu, Lin Tan
Summary: In this study, FeCl3 and poly(acrylic acid) (PAA) were doped into waterborne polyurethanes (WPUs) to create multifunctional materials with self-healing and antimicrobial properties. WPU/Fe/PAA-5.5, containing 5.5 wt % PAA, exhibited excellent mechanical properties, strong self-healing capabilities, and an impressive antimicrobial rate of over 90%. These supramolecular films were also highly recyclable through hot-pressing.
Article
Polymer Science
Longyu Tian, Min Wang, Guangming Liao, Baoliang Liu, Sujuan Zhang, Yucheng Sun, Zhen Meng, Jintao Zhang, Zaijun Lu
Summary: Two kinds of benzoxazine monomers were synthesized and used to prepare polybenzoxazine anion exchange membranes (AEMs) with quaternary ammonium functionalization. The LQPBZ AEM exhibited better ion conductivity and alkaline stability.
Article
Polymer Science
Claire A. Lemarchand
Summary: This study investigates the shock behavior of three different polymers through molecular dynamics simulations. The results reveal specificities in the shock behavior of polymers, including deviations from the linear relation between shock velocity and particle velocity, as well as differences in shear stress relaxation behind the shock front. It is found that the deviation of the Hugoniot locus is related to the change in the relative contribution of bonding and non-bonding potential energies, while polymers with higher glass transition temperatures exhibit slower shear stress relaxation.
Article
Polymer Science
Zengquan Liu, Xiaochun Yin, He Zhang, Shuo Gao, Qinglin Kuang, Yanhong Feng
Summary: A powder solid-state extension (PSSE) technology was proposed to address the high melt viscosity issue of UHMWPE. By uniaxial extension and sintering in the solid state, a highly self-reinforced material was prepared. X-ray diffraction and scattering techniques were used to study the structural evolution during the PSSE process, and a solid-phase induced transformation model was established.
Article
Polymer Science
Zhike Li, Anyu Luo, Rui Zhou, Xin Li, Haiyan Li
Summary: A novel high temperature resistance IL@SiO2 nanocapsules were successfully prepared and their friction and wear properties in PA6 composites were studied. The addition of IL@SiO2 nanocapsules reduced the friction coefficient and wear rate without affecting the mechanical properties of PA6. The synergy between the IL core and SiO2 wall in the nanocapsules improved the self-lubricating performance of the PA6 composites.
Article
Polymer Science
Xin Liu, Xuhong Guo, Qi Liao
Summary: In this study, an algorithm for accurately estimating viscosity is developed using molecular dynamics simulations and the Green-Kubo formula. This algorithm can be applied to complex systems with long correlations, such as macromolecular and biological simulation systems.
Article
Polymer Science
Hao Pu, Yun-Lei Hou, Jing -Zhou Chen, Dong -Lin Zhao
Summary: The use of modified graphene improves the interfacial adherence of carbon fibers to epoxy resin, resulting in enhanced interfacial and bending properties of CF and matrix in CF/EP composites, as well as increased interlaminar shear strength and flexural strength.
Article
Polymer Science
Wei-Chung Ke, Jin-Wei Lin, Manohar Reddy Busireddy, Yueh-Hsing Lee, Jiun-Tai Chen, Chain-Shu Hsu
Summary: This study introduces a crosslinkable monomer, TAIC, to synthesize three crosslinked polyimide films, which exhibit improved thermal, mechanical, and dielectric properties. The introduction of TAIC enhances the tensile strength, reduces the dielectric constant and dielectric loss, and decreases the coefficient of thermal expansion of the polyimide films.
Article
Polymer Science
Alex Kwasi Kumi, Ruiling Fan, Ye Chen, Yumei Zhang
Summary: The difference in leaching of amylopectin from cellulose/amylopectin/1-butyl-3-methylimidazolium chloride ([Bmim][Cl]) blends during regeneration in water and aqueous ethanol has been studied. Molecular dynamics simulations showed that the dissolution and regeneration mechanisms of amylopectin in [Bmim][Cl] are similar to cellulose in ionic liquids. Water regeneration leads to weak electrostatic interactions, resulting in high leaching of amylopectin. In contrast, ethanol-water interactions enhance electrostatic interactions among amylopectin chains, limiting amylopectin leaching in aqueous ethanol.
Article
Polymer Science
Xi Zeng, Junwei Zhou, Junbiao Peng, Chunsheng Zhang, Danling Wang, Yihu Song, Qiang Zheng
Summary: This study utilizes an oligomer deep eutectic solvent (DES) based on polyethylene glycol to regulate the vulcanization kinetics of rubber. The results show that the DES can accelerate vulcanization at low temperatures without affecting the crosslinking density and Mullins effect.
Article
Polymer Science
Qianqian Yue, Yongfei Peng, Xingjian Liu, Aihua He, Huarong Nie
Summary: The addition of metal deactivators can effectively suppress the aging of TBIR, prolong its lifespan, and have no negative effects on its physical and processing properties. These research findings are of great importance for improving the stability and aging resistance of polymers.
Article
Polymer Science
J. Gomez-Caturla, J. Ivorra-Martinez, R. Tejada-Oliveros, V Moreno, D. Garcia-Garcia, R. Balart
Summary: This work focuses on the development of environmentally friendly PLA formulations by using different esters derived from geraniol as plasticizers. The results show that these esters have good compatibility with PLA, and they can effectively enhance the elongation and plasticity of PLA, reduce its glass transition temperature, and slightly improve its water absorption capabilities.
Article
Polymer Science
Dandan Li, Zhaohui Lu, Zhao Ke, Ke Xu, Fengna Dai, Youhai Yu, Guangtao Qian, Chunhai Chen
Summary: In this study, cross-linked PI aerogel membranes with low dielectric constant and high moisture resistance were prepared by co-polymerization and scraping coating technology. The incorporation of fluorinated blocks and benzimidazole ring structures resulted in novel PI aerogel membranes with fascinating dielectric properties and outstanding moisture resistance.
Article
Polymer Science
Zhaoyang Chu, Qing Zhang, Haihua Luo, Han Zhou, Fapei Zhang, Wei Chen, Wenhua Zhang
Summary: Multi-physical fields solution processing strategy is a universal and facile method for preparing various conjugated polymer films and high-performance devices. In this study, we employed a combined microfluidic flow and ultrasonication strategy (FU) for processing CP solutions, and found a pronounced synergetic effect in promoting the pre-ordering of chains in solution. The conformation order and anisotropy of the solution were revealed through various characterizations. A non-classical nucleation model for polymer crystallization in non-equilibrium solution processing was confirmed. The roles of microfluidic flow and ultrasonication in chain aggregation and crystallization were addressed through multi-physical simulations. Compared to pristine solutions, the FU strategy showed improved solution anisotropy and crystallization kinetics, resulting in higher crystallinity in films and increased mobilities in OFET devices. The FU processing strategy provides a universal approach for regulating chain conformation and aggregation in conjugated polymer solutions.