Article
Chemistry, Multidisciplinary
Jun He, Ying Chen, Li Zhang, Jianbo Tan
Summary: In this study, stimulus-responsive vesicles are prepared by photoinitiated RAFT seeded emulsion polymerization. The obtained vesicles can transform into different shapes and be used for controlled release of cargos in the presence of reactive oxygen species.
CHINESE CHEMICAL LETTERS
(2023)
Article
Polymer Science
Xiaowei Fu, Yuanyuan Jiang, Yanjun Wang, Changlin Zhou, Jingxin Lei
Summary: The SBAS TBCPs with dual structural asymmetry were synthesized via RAFT emulsion polymerization, where the interaction between PSt and PBA blocks was tailored by the asymmetry of two outer PSt blocks, leading to changes in the material properties.
EUROPEAN POLYMER JOURNAL
(2021)
Article
Polymer Science
Murtaza Khan, Thiago R. Guimaraes, Kenneth Choong, Graeme Moad, Sebastien Perrier, Per B. Zetterlund
Summary: The study overcomes the limitation of block copolymer synthesis that requires consideration of the order of blocks by utilizing RAFT emulsion polymerization, successfully preparing an alternating pentablock copolymer composed of methacrylates and styrene.
Article
Polymer Science
Ke Xu, Bo Fan, Kevin Putera, Michaela Wawryk, Jing Wan, Bo Peng, Mark M. Banaszak Holl, Antonio F. Patti, San H. Thang
Summary: This study demonstrates a new surfactant-free emulsion polymerization method, using surface cross-linking technology to achieve high cross-linking efficiency and prevent surfactant migration. This approach produces films with improved physical properties.
Article
Chemistry, Multidisciplinary
Sung-Po R. Chen, Valentin A. Bobrin, Zhongfan Jia, Michael J. Monteiro
Summary: In this study, we demonstrate a simple and effective solvent-free method to prepare anisotropic polymer nanoparticles directly in water by controlling polymer mobility through tuning its glass transition temperature (T-g). The morphology of the particles can be transformed from spherical to tadpole-like structures by cooling above the T-g, and can be reversed by heating above the T-g, showing a triggered and on-demand structural reorganization.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Chemistry, Multidisciplinary
Satu Hakkinen, Joji Tanaka, Ramon Garcia Maset, Stephen C. L. Hall, Steven Huband, Julia Y. Rho, Qiao Song, Sebastien Perrier
Summary: This study reports the polymerisation-induced self-assembly of copolymers during RAFT grafting, showing the formation of various morphologies of micelles in the polymerisation process, providing new avenues for controlling polymer structure and material properties.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Correction
Polymer Science
Thiago R. Guimaraes, Y. Loong Bong, Steven W. Thompson, Graeme Moad, Sebastien Perrier, Per B. Zetterlund
Summary: The study investigates the effect of Z-group on the nucleation step in polymerization-induced self-assembly via RAFT in emulsion, providing valuable insights for this process.
Article
Materials Science, Multidisciplinary
Puja Das Karmakar, Aniruddha Pal, Subhadip Bodhak, Sagar Pal
Summary: The study synthesized nanocomposites consisting of magneto-responsive gamma-Fe2O3 NPs and copolymers, with a regular core-shell morphology where the magnetic NPs act as the core and the copolymer as the shell. This developed nanocarrier has been found to be highly efficient in carrying a hydrophobic drug (naproxen).
ACS APPLIED POLYMER MATERIALS
(2021)
Article
Materials Science, Composites
Zongqian Yuan, Aishun Ding, Binbin Xu, Xiaoyu Huang, Guolin Lu, Hao Guo
Summary: This study presents a new method for producing reactive composite nanofibers through polymerization-induced self-assembly (PISA). The method allows for the preparation of one-dimensional composite nanofibers with controlled molecular weights and narrow dispersities.
COMPOSITES COMMUNICATIONS
(2022)
Review
Polymer Science
Bing Niu, Ying Chen, Li Zhang, Jianbo Tan
Summary: Organic-inorganic hybrid nanomaterials are important functional materials prepared through cooperative self-assembly and polymerization-induced self-assembly (PISA). The conventional method of cooperative self-assembly encounters problems with low solids contents and multi-step processes, while PISA enables the preparation of concentrated block copolymer nanomaterials. This review focuses on recent developments in preparing organic-inorganic hybrid nanomaterials via PISA.
Article
Polymer Science
Junpeng Cao, Yingxin Tan, Ying Chen, Li Zhang, Jianbo Tan
Summary: This study explores how the reactive end group of macro-RAFT agent affects RAFT-induced emulsion polymerization for the first time. Different end groups were found to influence the morphologies of block copolymer nano-objects and the polymerization process. The use of asymmetric difunctional macro-RAFT agent allows for functionalization of the nano-objects.
MACROMOLECULAR RAPID COMMUNICATIONS
(2021)
Article
Chemistry, Physical
Keran Li, Jing Li, Qin Zhang, Hui Dai
Summary: Poly(2-(dimethylaminoethyl methacrylate)-b-(glycidyl methacrylate)-b-(acrylic acid)) blocks were grafted to Fe3O4 surface to obtain four-responsive nanocomposite particles (P(DMAEMA-b-GMA-b-AA)/Fe3O4) with V-shaped surface structure. The structure and properties were characterized by FT-IR, TEM, and TGA. The stability of the Pickering emulsion was investigated under different factors, and the nanoparticles exhibited environmentally friendly behavior and could be recycled through magnetic force. The developed nanoparticles have great potential in oily wastewater treatment, oil transfer, and crude oil delivery systems design.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Polymer Science
Uddhab Kalita, Sarthik Samanta, Sovan Lal Banerjee, Narayan C. Das, Nikhil K. Singha
Summary: A novel thermoplastic elastomer (TPE) composed of polystyrene and poly(beta-myrcene) was successfully prepared using the RAFT polymerization method. This TPE showed good physical properties and sustainable recyclability.
Article
Polymer Science
Alexandros E. Alexakis, Olivia R. Wilson, Eva Malmström
Summary: The combination of RAFT polymerization and PISA can produce monodisperse nanolatexes. This study demonstrates the synthesis of reproducible bimodal nanolatexes by extending protonated PDMAEMA with MMA in water and provides the first imaging data. The bimodality is induced by the hydrophilic Z-group of the RAFT agent, which has been reported to cause bimodal molecular weight distributions in RAFT-mediated PISA. The advantages of such nanolatexes in coating applications are briefly explored, including their one-pot synthesis, higher contact angle against water when adsorbed on cellulose filter paper, and morphological arrangement dependent on the drying protocol.
Article
Polymer Science
Junpeng Cao, Yingxin Tan, Xiaocong Dai, Ying Chen, Li Zhang, Jianbo Tan
Summary: In this study, the intrinsic monomer-feeding mechanism of RAFT-mediated emulsion polymerization was utilized to delay in situ crosslinking during PISA, enabling the preparation of cross-linked block copolymer nano-objects with high crosslinker contents. The use of various cross-linkers with different properties was demonstrated to promote the formation of higher-order morphologies.
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.