Article
Biochemical Research Methods
Huiliang Geng, Zihan Wang, Feifang Zhang, Zongying Li, Bingcheng Yang
Summary: This study describes a polymer polar stationary phase functionalized with hyperbranched polyglycerol for hydrophilic interaction chromatography (HILIC). The functionalized phase demonstrates good separation performance, wider pH tolerance range, and minimal bleed level under gradient elution mode.
JOURNAL OF CHROMATOGRAPHY A
(2022)
Article
Polymer Science
Raita Goseki, Taro Koizumi, Reina Kurakake, Satoshi Uchida, Takashi Ishizone
Summary: Anionic polymerizations of 4-chlorostyrene, 4-bromostyrene, and 4-iodostyrene were successfully carried out at low temperatures using sec-butyllithium or oligo(alpha-methylstyryl)lithium as initiators. The choice of initiators and conditions allowed for control of the molecular weight distribution and molecular weights of the resulting polymers. The addition of cesium phenoxide as an additive led to the production of polymers with narrow molecular weight distributions and predictable molecular weights.
Article
Chemistry, Multidisciplinary
Masatoshi Tosaka, Hinako Takeuchi, Masato Kibune, Tianxiang Tong, Nanyi Zhu, Shigeru Yamago
Summary: Stochastic simulation of the formation process of hyperbranched polymers (HBPs) using a branch-inducing monomer, evolmer, revealed that the observed dispersities (Ds) were due to the distribution of the number of branches instead of undesired side reactions. The simulation also showed that the branch structures were well controlled and the majority of HBPs had structures close to the ideal one. Furthermore, the simulation suggested a slight dependence of branch density on molecular weight, which was experimentally confirmed.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Biochemistry & Molecular Biology
Sozan Najib Abdullah, Georgia Mann, Lance J. Twyman
Summary: The ability to bind, select, and transport species across different phases is crucial in fields like medicine, materials, and environmental science. This study describes a method using functionalized dendritic polymer to bind and transport anionic molecules, inspired by natural encapsulation principles. Experimental results showed that using smaller HBPs led to optimal binding and transport efficiency, supporting the existence of a dense packed limit for HBPs.
Article
Polymer Science
Ramon Novoa-Carballal, Sergey Nosov, Sandrine Pfaff, Holger Schmalz, Axel H. E. Mueller
Summary: Highly branched polybutadienes were successfully synthesized via ASCVCP method, with SEC/viscosity measurements confirming the branched structure of the obtained polymers. Differences in mechanism were observed in the polymerization of two isomers of divinylbenzene. The living nature of the polymerization allowed further amino-functionalization or growth of (meth)acrylate arms, leading to hyperstar molecules.
Article
Polymer Science
Min Su, Yu-Jing Sheng, Yu-Jiao Chen, Tao Li, Quan-Xi Shi, Hang Xiao, Meng-Qin Pu, Hongli Bao, Wen-Ming Wan
Summary: A versatile living polymerization method is reported, which allows the precise synthesis of narrow distributed polystyrenes through the introduction of a well-established all-in-one covalent-anionic-radical Barbier strategy, using a wide variety of organohalides as initiators under mild conditions.
Article
Chemistry, Multidisciplinary
Bonwoo Koo, Cheoljae Kim
Summary: A stereocontrolled degradable polymer was synthesized via living cascade enyne metathesis polymerization from highly stereodefined N,O-acetal-containing enyne monomers. The resulting polymer can degrade under different acid concentrations, providing control over the degradation rate.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Polymer Science
Tian Zhang, Eamonn D. Conrad, Derek P. Gates
Summary: The living anionic polymerization of phosphaalkene has been used to synthesize a series of PMP homopolymers and PMP/S block copolymers. The samples showed monodispersity, narrow dispersities, and specific transition temperatures in their DSC chromatograms.
Article
Polymer Science
Huikang Fang, Xiaoyang Huo, Lu Wang, Han Si, Hongkun Li, Anjun Qin, Ben Zhong Tang, Yongfang Li
Summary: In this study, the RhCl3-catalyzed polycyclotrimerization of activated internal diynes was reported for the first time to prepare hyperbranched polyphenylenes. The results showed that high molecular weight and high regioregularity hyperbranched polymers can be obtained under reflux conditions.
Article
Chemistry, Multidisciplinary
Pengfei Zhang, Viko Ladelta, Nikos Hadjichristidis
Summary: This study reports the successful living/controlled anionic ring-opening polymerization of glycolide in strong protic fluoroalcohols, which are conventionally considered incompatible with anionic polymerization. Well-defined polyglycolide and various PGA-based macromolecules were obtained for the first time at room temperature. The low-boiling-point fluoroalcohols and polyglycolide can be recycled through simple distillation and sublimation, providing a promising sustainable alternative for tackling plastic pollution problems.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Wenxiu Lv, Yanchao Wang, Maosheng Li, Xianhong Wang, Youhua Tao
Summary: This article introduces an unprecedented anion-binding catalytic system for the fast and selective anionic ring-opening polymerization of NCAs. The method leads to the precise construction of various polypeptides with narrow molecular weight distributions and living polymerization behavior, demonstrating high selectivities for monomer propagation.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Polymer Science
Chao Liu, Hua-Long Zhang, Wen Xu, Cai-Yuan Pan, Chun-Yan Hong
Summary: A multicyclic polymer with a hyperbranched structure was successfully synthesized by initiating the ATRP of styrene with a tailored initiator. The obtained hyperbranched multicyclic polymer contained an average of 47 cyclic units and was prepared via a series of reactions including click reaction and UV-induced coupling reaction.
Review
Polymer Science
Di Zhou, Liang-Wei Zhu, Bai-Heng Wu, Zhi-Kang Xu, Ling-Shu Wan
Summary: This review comprehensively summarizes the synthetic methods to prepare end-functionalized polymers fabricated by CLRP techniques, including ATRP, RAFT, SFRP, iniferters, ITP, CMRP, and OMRP. The methods basically follow the principles of taking advantage of functional initiators or post-modifying the reactive chain-ends to obtain a wide variety of mono- or di-end-functionalized polymers.
Article
Chemistry, Applied
Jiansen Pan, Liqin Mei, Huan Zhou, Cong Zhang, Qingyi Xie, Chunfeng Ma
Summary: Degradable hyperbranched anti-biofouling polymers synthesized via RAFT polymerization exhibit inhibitory effects on marine bacteria and diatom adhesion, showing potential for marine anti-biofouling applications.
PROGRESS IN ORGANIC COATINGS
(2022)
Article
Materials Science, Multidisciplinary
Yuping Liu, Wei Ma, Zhen Dong, Nanting Qiu, Liwei Ma, Zhong-Ren Chen, Hua Wei
Summary: This study developed a facile and robust method for the synthesis of multifunctional hyperbranched polymers with a precisely modulated degree of branch, predetermined polymer compositions, controlled molecular weights, and low dispersity indexes. The resulting polymers can self-assemble into stabilized unimolecular micelles and show accelerated drug release in reducing or acidic pH conditions.
ACS APPLIED POLYMER MATERIALS
(2021)
