1,1'-Thiocarbonyldiimidazole (TCDI) readily undergoes radical copolymerization with -butyl acrylate (BA), ,-dimethylacrylamide, and styrene. H NMR monitoring of the comonomer reactivity revealed a notable compatibility between TCDI and comonomers, resulting in similar consumption rates when TCDI was introduced at a 10% feed ratio. Furthermore, trithiocarbonate-mediated RAFT copolymerization of TCDI with BA gave polymers that exhibited a linear increase of molar mass ( = 2-10 kg mol) with conversion with relatively low dispersities (1.2-1.4). Importantly, this process enabled a successful chain extension of the produced P(TCDI--BA) copolymer with styrene to form a diblock copolymer. The copolymers generated through this method contain TCDI-derived diimidazolyl thioether moieties, as established through H NMR spectroscopy. Additionally, degradation experiments using isopropylamine, benzoyl peroxide, sodium methoxide, and bleach have provided further confirmation of the presence of degradable TCDI moieties in the vinyl copolymer backbone.
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http://dx.doi.org/10.1021/acsmacrolett.3c00676 | DOI Listing |
Angew Chem Int Ed Engl
December 2024
Fudan University, Handan Road 220, 200433, Shanghai, CHINA.
Polymer-based organic electrodes for rechargeable batteries are attractive due to their design flexibility, sustainability, and environmental compatibility. Unfortunately, waste management of conventional polymer materials typically involves incineration, which emits greenhouse gases. Consequently, degradable polymers should be ideal candidates for future green batteries.
View Article and Find Full Text PDFInt J Biol Macromol
December 2024
Key Lab. Eco-functional Polymer Materials of MOE, Institute of Polymer, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China.
To address the problems of ecological pollution and food safety caused by the excessive use of chemical fertilizers in modern agriculture, it has become a hot topic of current research to develop novel low-cost, biodegradable, and efficient gel slow-release fertilizers. Herein, using xanthan gum and ZrMOF as raw materials, urea as a nutrient, acrylic acid and itaconic acid as co-monomers, a novel ZrMOF gel slow-release fertilizer (ZrMOF@CpM) was prepared by free radical copolymerization. After being characterized, its swelling and water retention properties and slow-release behavior were investigated.
View Article and Find Full Text PDFNanotechnology
December 2024
Chemistry and Biochemistry, North Carolina Central University, North Carolina Central University USA, Durham, 27707-3129, UNITED STATES.
Ciprofloxacin (CIP) is a widely used antibiotic, and its presence in water bodies poses a risk due to its resistance to conventional wastewater treatment processes. The accumulation of such pharmaceuticals can disrupt aquatic ecosystems, harm aquatic life, and contribute to ecological imbalances. Therefore, the degradation of CIP is of immense environmental significance.
View Article and Find Full Text PDFACS Polym Au
December 2024
Institute of Technical Chemistry, Clausthal University of Technology, Arnold-Sommerfeld-Strasse 4, 38678 Clausthal-Zellerfeld, Germany.
Itaconates available from renewable resources constitute a group of monomers that are used in several types of polymerizations. Their use in free-radical polymerizations (FRPs) is still limited due to the low propagation rate coefficients resulting in low polymerization rates and the occurrence of depropagation which is responsible for limited monomer conversion. Since FRP is considered very robust with few requirements concerning monomer purity, it is still interesting to investigate how itaconate FRP may become feasible.
View Article and Find Full Text PDFFront Chem
November 2024
The Ninth Oil Extraction Plant of Changqing Oilfield Company, Xi'an, China.
Supramolecular gel can be used to seal fractures and pores in the formation during oil and gas drilling and production. In this study, a supramolecular gel plugging agent based on hydrophobic association was prepared by free radical polymerization of acrylamide, octadecyl methacrylate, sodium dodecyl sulfate and other monomers by micellar copolymerization. The forming time, rheology, swelling, mechanical properties and plugging properties of supramolecular gels were studied.
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