Review
Polymer Science
Lianqian Wu, Brayan Rondon, Shoshana Dym, Wenqi Wang, Kuiru Chen, Jia Niu
Summary: Cationic polymerization is a powerful strategy for the production of well-defined polymers and advanced materials. Recent developments, including the use of light and electricity for spatiotemporally controlled polymerization, stereoselective polymerization, and chemically recyclable/degradable polymers, have greatly advanced the field. These advancements have significant implications for polymer science and beyond.
PROGRESS IN POLYMER SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Jun Guan, Zejun Sun, Ramin Ansari, Yujia Liu, Aimi Endo, Masafumi Unno, Armelle Ouali, Shahrea Mahbub, Joseph C. Furgal, Nuttapon Yodsin, Siriporn Jungsuttiwong, Daniel Hashemi, John Kieffer, Richard M. Laine
Summary: Multiple studies have explored the use of cage silsesquioxanes as backbone elements in hybrid polymers, and unexpected photophysical properties of copolymers derived from double decker silsesquioxanes were discovered, suggesting unconventional conjugation.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Review
Engineering, Environmental
Huiyue Wang, Zhao Jin, Xin Hu, Qiao Jin, Songwei Tan, Ali Reza Mahdavian, Ning Zhu, Kai Guo
Summary: By combining microreactor and cation pool method or carbocation stabilization, improved living cationic polymerizations can be achieved under mild conditions. This review highlights cationic addition polymerizations of vinyl monomers and cationic ring-opening polymerizations of cyclic monomers in the context of microreactor-based flow chemistry, proposing challenges and opportunities to promote the development of cationic polymerization in both academia and industry.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Polymer Science
Daniele Maugeri, Marco Sangermano, Yves Leterrier
Summary: Two different interpenetrating phase composites were produced using a radical photoinduced cationic frontal polymerization process. The influence of different initiators on the frontal polymerization features was systematically evaluated. Complete conversion of the epoxy resin was achieved within a short time under proper concentration, but led to high temperature and material degradation.
POLYMER INTERNATIONAL
(2021)
Article
Polymer Science
Jaworski C. Capricho, Karamat Subhani, Boon Xian Chai, Gary Bryant, Nisa Salim, Saulius Juodkazis, Bronwyn Louise Fox, Nishar Hameed
Summary: In this study, intrinsic p-type conductivity was achieved in an aliphatic epoxy material through derivatization with stable radicals, showing potential for energy storage applications. The use of short-chain diamine spacer 1,2-diaminoethane resulted in the best supercapacitor performance, with the observed cycling stability being rare for materials exhibiting pseudocapacitance.
Article
Chemistry, Multidisciplinary
Timur Ashirov, Patrick W. Fritz, Yanic Lauber, Claudia E. Avalos, Ali Coskun
Summary: In this study, a direct synthesis method for a fully conjugated 3D porous organic polymer (POPs) named benzyne-derived polymers (BDPs) was reported. The resulting BDPs exhibited ultramicroporous structures with surface areas up to 544 m(2) g(-1) and high CO2/N-2 selectivities. This research shows the potential of BDPs as a promising material for gas separation and storage.
CHEMISTRY-A EUROPEAN JOURNAL
(2023)
Article
Agricultural Engineering
Xujuan Huang, Zhengqing Ding, Weiyun Wang, Xinyan Yan, Yu Zhou, Zhaosheng Cai
Summary: RP-AESO porous materials prepared by emulsion template have uniform pore size distribution, hydrophobic properties, and oil absorption capacity. With increasing concentration of H-ESO-HEC, the pore density of RP-AESO porous materials increases and the average pore size decreases, leading to a decrease in compressive strength. Furthermore, these porous materials exhibit good reusability.
INDUSTRIAL CROPS AND PRODUCTS
(2022)
Article
Polymer Science
Xiaoyan Meng, Longji Li, Yaoxin Huang, Xin Deng, Xiaoxuan Liu, Zhiquan Li
Summary: Several efficient sulfonium salts were reported as unimolecular photoinitiators for initiating upconversion nanoparticle-assisted cationic and radical/cationic hybrid photopolymerization. The resulting luminescent polymeric materials, with curing depths over 10 cm and good network uniformity, are dual-wavelength responsive and hold great potential in sensing and anti-counterfeiting applications.
Article
Polymer Science
Wei Cao, Liangxiao Tan, Hong Wang, Jiayin Yuan
Summary: Dual-cationic PIL homopolymers carrying both imidazolium and 1,2,4-triazolium moieties were synthesized by exploiting the reactivity difference, leading to the expansion of their application spectrum.
Review
Polymer Science
Mineto Uchiyama, Kotaro Satoh, Masami Kamigaito
Summary: Since the first report of cationic reversible addition-fragmentation chain transfer (RAFT) polymerization in 2015, significant progress has been made in various aspects of cationic RAFT and degenerative chain transfer (DT) polymerizations. This review focuses on the similarities and differences between cationic and radical RAFT polymerizations, discussing the characteristics and expanding potentials of cationic RAFT and DT polymerizations.
PROGRESS IN POLYMER SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Jacopo Perego, Silvia Bracco, Angiolina Comotti, Daniele Piga, Irene Bassanetti, Piero Sozzani
Summary: An anionic mechanism was utilized to create linear polymers and copolymers anchored to high-surface-area porous nanoparticles, demonstrating covalent connection between the polymers and the 3D network. The growth of anchored chains outside the pores was achieved through anionic propagation, promoting sequential reactions and the formation of nanoparticles covered by a second polymer via anionic block copolymerization. Magnetization transfer across interfaces in 2D H-1-C-13-HETCOR NMR spectra confirmed the intimate relationship between the matrix and the grown-in polymers.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Multidisciplinary
Maosheng Li, Hongyu Li, Xiaoyong Zhang, Xianhong Wang, Youhua Tao
Summary: Exploiting non-covalent interactions to catalyze ionic polymerizations is still in its early stages. A recent study demonstrated non-covalent anion-binding catalysis for living cationic polymerization of vinyl ethers. This study further investigates the structure-reactivity relationships and roles of anion-binding interactions in the catalytic process. The findings provide insights into the mechanism of anion-binding catalytic polymerization and offer guidance for future catalyst design.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Polymer Science
Yuji Daito, Reina Kojima, Naoyuki Kusuyama, Yasuhiro Kohsaka, Makoto Ouchi
Summary: Magnesium bromide was found to be an effective catalyst for ring-expansion cationic polymerizations of isobutyl vinyl ether, resulting in the synthesis of cyclic poly(IBVE)s. The use of a quencher instead of methanol, along with the realization of living cationic polymerization under magnesium catalysis, were crucial for this achievement. The advantage of MgBr2 over conventional catalysts is its ability to use various types of cyclic molecules as initiators and facilitate precise incorporation of polar groups into the resultant cyclic polymers.
Article
Polymer Science
Xia Lin, Qianxi Gu, Jiajia Li, Jian Zhu
Summary: In this study, a facile and robust method for living cationic polymerization using zinc wire as a catalyst precursor was developed. Well-defined poly(vinyl ether)s with various molecular weights and narrow molecular weight distributions were obtained at room temperature. The in situ generation of trace zinc ions was found to be the key to the mild conditions of the polymerization. The utilization of zinc wire offered advantages of reusability, easy separation, and low metal residue. Moreover, the method was successfully applied in continuous flow polymerization, showing potential for scalable and efficient industrial production under mild conditions.
Article
Materials Science, Multidisciplinary
M. Nazir Tahir, Masoud Harati, Audithya Nyayachavadi, Mehdi Rezapour, S. Holger Eichhorn, Simon Rondeau-Gagne
Summary: In polymeric materials, intrinsic porosity arises from molecular building block rigidity and shape, with well-defined pores requiring the polymerization of rigid monomers without interference. This study successfully functionalized a bulky hexachlorocyclotriphosphazene core into an inherently porous polydiacetylene, with significant changes in porous structure confirmed by Raman spectroscopy, X-ray diffraction, and surface area measurements. Topochemical polymerization of diacetylenes presents a promising strategy for the preparation of functional materials, even in amorphous phases of bulky molecules.
ACS APPLIED POLYMER MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Yajing Du, Hongzhi Liu
Article
Materials Science, Multidisciplinary
Rong Shen, Yajing Du, Xiaoru Yang, Hongzhi Liu
JOURNAL OF MATERIALS SCIENCE
(2020)
Article
Chemistry, Physical
Yajing Du, Hongzhi Liu
Summary: The hybrid porous polymers based on triazine-functionalized silsesquioxane exhibit good thermal stability and high photocatalytic degradation activity for dyes, making them potential candidates for environmentally friendly catalysts.
Article
Materials Science, Multidisciplinary
Mengshuang Zhang, Yajing Du, Hongzhi Liu
Summary: In recent years, porous hybrid polymers have shown promising prospects in environmental restoration due to their excellent comprehensive performances. Two types of porous silsesquioxane/triazine hybrid polymers were synthesized through the Friedel-Crafts reaction using different ratios of phenyl- or thiophene-substituted triazine monomers and octavinylsilsesquiox-ane (OVS). The adsorption capacities of the polymers for dyes and iodine vapor were investigated, with PCS-TPH exhibiting higher absorption capacities for large-sized Congo Red (CR) and rhodamine (RB) and both PCS-TPH and PCA-TSA showing similar adsorption amounts for iodine vapor. The materials also demonstrated specific response to iodine among different types of anions due to charge transfer effects.
ACS APPLIED POLYMER MATERIALS
(2023)
Article
Chemistry, Physical
Yajing Du, Haoqiang Ai, Yun Liu, Hongzhi Liu
Summary: A range of phenyl- or thiophene-linked covalent triazine-based frameworks were synthesized with good thermal stability, tunable fluorescence properties, and strong visible-light harvesting ability. These materials showed unprecedented degradation ability to both acidic and basic dyes without adjusting pH or adding oxidants. Furthermore, they exhibited good reusability and stability as photocatalysts.
SUSTAINABLE ENERGY & FUELS
(2023)
Review
Chemistry, Inorganic & Nuclear
Yajing Du, Hongzhi Liu
DALTON TRANSACTIONS
(2020)
Article
Nanoscience & Nanotechnology
Yajing Du, Masafumi Unno, Hongzhi Liu
ACS APPLIED NANO MATERIALS
(2020)
