European Polymer Journal最新文献_第2页

Application of new photoinitiating systems based on BODIPY derivatives in long-wavelength photo-induced free radical polymerization

IF 5.8 2区化学

European Polymer Journal Pub Date : 2025-02-20 DOI: 10.1016/j.eurpolymj.2025.113833

Hui Deng , Jiansong Yin , Yingzhu Sun , Wenlong Tang , Yijie Yu , Hao Li , Yangyang Xu , Changjiang Yu , Ke Sun , Jacques Lalevée

{"title":"Application of new photoinitiating systems based on BODIPY derivatives in long-wavelength photo-induced free radical polymerization","authors":"Hui Deng , Jiansong Yin , Yingzhu Sun , Wenlong Tang , Yijie Yu , Hao Li , Yangyang Xu , Changjiang Yu , Ke Sun , Jacques Lalevée","doi":"10.1016/j.eurpolymj.2025.113833","DOIUrl":"10.1016/j.eurpolymj.2025.113833","url":null,"abstract":"<div><div>Efficient photopolymerization activated by photoinitiators or photoinitiating systems (PISs) under visible light irradiation, especially at long wavelengths, has remained as a challenging research focus. In this work, four novel boron dipyrromethene (BODIPY) derivatives with high fluorescence properties were systematically investigated as light-harvesting organic dyes, which exhibited remarkable photoinitiation capacities under long-wavelength light irradiation. Markedly, these BODIPY derivatives efficiently induced the free radical photopolymerization of acrylates under irradiation from violet-to-green light-emitting diodes (LEDs), benefiting from the construction of three-component PISs comprising an amine and an iodonium salt. The high photoreactivity of these BODIPY dyes was assessed through steady-state photolysis and excited-state fluorescence quenching analyses, while the corresponding photochemical parameters were attained by theoretical calculations under the density functional theory (DFT) method. In order to expand potential application areas, photopolymerized acrylate monomers by direct laser writing experiments using the investigated PIS, resulting in 3D patterns with smooth surfaces. high spatial resolution and significant fluorescence were successfully fabricated, providing a promising opportunity for developing efficient PIs with high fluorescence in photo-curing 3D printing area.</div></div>","PeriodicalId":315,"journal":{"name":"European Polymer Journal","volume":"228 ","pages":"Article 113833"},"PeriodicalIF":5.8,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143487419","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Bio-polyol chemical design for self-healing boronate ester gels by green oxyalkylation of organosolv lignin 通过对有机溶胶木质素进行绿色氧烷基化，为自愈合硼酸酯凝胶设计生物多元醇化学方法

IF 5.8 2区化学

European Polymer Journal Pub Date : 2025-02-19 DOI: 10.1016/j.eurpolymj.2025.113846

Bram Jacobs , Ine Van Nieuwenhove , Sander Driesen , Pablo Reyes , Dagmar R. D’hooge , Geert-Jan Graulus , Katrien V. Bernaerts , An Verberckmoes

{"title":"Bio-polyol chemical design for self-healing boronate ester gels by green oxyalkylation of organosolv lignin","authors":"Bram Jacobs , Ine Van Nieuwenhove , Sander Driesen , Pablo Reyes , Dagmar R. D’hooge , Geert-Jan Graulus , Katrien V. Bernaerts , An Verberckmoes","doi":"10.1016/j.eurpolymj.2025.113846","DOIUrl":"10.1016/j.eurpolymj.2025.113846","url":null,"abstract":"<div><div>Lignin, the most abundant aromatic biopolymer, has a high potential as an alternative to fossil resources in the chemical industry. However, the non-uniformity of lignin is currently a drawback for high-end applications. In this work, glycerol carbonate being a green and safe cyclic carbonate was therefore applied in the oxyalkylation of organosolv lignin (weight average molecular weight of ≈ 8,300 g mol<sup>−1</sup>; aliphatic OH content of ca. 2.61 mmol g<sup>−1</sup>) to obtain a lignin-based polyol with solely aliphatic OH functionalities. The catalyst type, reaction temperature and time and additional solvents were evaluated in the oxyalkylation with optimal settings using K<sub>2</sub>CO<sub>3,</sub> 175 °C, 30 min reaction time without any additional solvent to make a modified lignin with a weight average molecular weight of ca. 15,000 g mol<sup>−1</sup> and an aliphatic OH content of ca. 4.59 mmol g<sup>−1</sup>. To support mechanistic understanding it is shown that the carboxylic acid and phenolic hydroxyl functionalities are converted completely into 1,2-diols, while native aliphatic OH functionalities take at most slightly part in the modification reaction. Furthermore, upon the formation of vicinal diols, the functionalities partially react with glycerol carbonate by an internal transesterification into cyclic carbonate functionalities, this undesirable reaction being more dominant at lower temperatures. Notably, the performance of the oxyalkylation strategy is sufficient to crosslink the modified lignin with benzene-1,4-diboronic acid into a gel-like material with identical shear storage and loss moduli before destruction and immediately after destruction (for the lowest amount of crosslinker added = 1:1.15 diol/boronic acid functionalities molar ratio).</div></div>","PeriodicalId":315,"journal":{"name":"European Polymer Journal","volume":"228 ","pages":"Article 113846"},"PeriodicalIF":5.8,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143487411","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Harnessing the hydrolytic stability of poly(2-oxazine) living chain-ends for direct aqueous bioconjugations

IF 5.8 2区化学

European Polymer Journal Pub Date : 2025-02-19 DOI: 10.1016/j.eurpolymj.2025.113842

Niccolò Lusiani, Ondrej Sedlacek

{"title":"Harnessing the hydrolytic stability of poly(2-oxazine) living chain-ends for direct aqueous bioconjugations","authors":"Niccolò Lusiani, Ondrej Sedlacek","doi":"10.1016/j.eurpolymj.2025.113842","DOIUrl":"10.1016/j.eurpolymj.2025.113842","url":null,"abstract":"<div><div>Poly(2-oxazine)s (PAOzi) have recently emerged as attractive alternatives to poly(2-oxazoline)s (PAOx) for biomedical applications. In this work, we exploit the slower hydrolysis of the oxazinium chain-ends in PAOzi, synthesized by cationic ring-opening polymerization, enabling direct, one-step nucleophilic conjugation with amines in aqueous environments. On the other hand, analogous PAOx showed exclusively chain-end hydrolysis. We show that the PAOzi hydrolysis rate strongly depends on pH, guiding us to optimal conjugation conditions. By employing buffer/DMSO mixtures and precisely tuning pH, we achieved good conjugation efficiencies with model primary amine and bovine serum albumin (BSA). Efficient bioconjugation under these mild, biocompatible conditions was confirmed by MALDI-TOF mass spectrometry, SEC, and diffusion-ordered (DOSY) NMR. Such aqueous conjugation is unique for living polymers arising from ionic polymerizations, which are notoriously known for their moisture sensitivity. This streamlined, scalable approach offers a versatile platform for next-generation polymer-protein conjugates and advanced drug delivery systems.</div></div>","PeriodicalId":315,"journal":{"name":"European Polymer Journal","volume":"228 ","pages":"Article 113842"},"PeriodicalIF":5.8,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143454779","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Recoverable catalyst-mediated temporal controlled photoinduced RDRP in ionic liquids

IF 5.8 2区化学

European Polymer Journal Pub Date : 2025-02-18 DOI: 10.1016/j.eurpolymj.2025.113839

Amul Jain, Bhanendra Sahu, Nikhil Ingale, Sanjib Banerjee

引用次数: 0

Nanocomposite 1:2 demultiplexer based on surface-grafted poly(methacrylic acid) brushes with in situ-fabricated CdS particles

IF 5.8 2区化学

European Polymer Journal Pub Date : 2025-02-17 DOI: 10.1016/j.eurpolymj.2025.113838

Agnieszka Podborska , Weronika Górka-Kumik , Paweł Dąbczyński , Michał Szuwarzyński

{"title":"Nanocomposite 1:2 demultiplexer based on surface-grafted poly(methacrylic acid) brushes with in situ-fabricated CdS particles","authors":"Agnieszka Podborska , Weronika Górka-Kumik , Paweł Dąbczyński , Michał Szuwarzyński","doi":"10.1016/j.eurpolymj.2025.113838","DOIUrl":"10.1016/j.eurpolymj.2025.113838","url":null,"abstract":"<div><div>A nanocomposite-based 1:2 demultiplexer is presented, leveraging surface-grafted poly(methacrylic acid) (PMAA) brushes embedded with in situ-fabricated cadmium sulfide (CdS) nanoparticles. The presented nanocomposite design synergizes electronic properties of semiconducting CdS with the unique polymer brushes architecture, enabling precise photo-induced signal routing. The PMAA brushes were synthesized via surface-initiated atom transfer radical polymerization (ARGET-ATRP), followed by the in-situ generation of CdS nanoparticles through a controlled chemical precipitation method, resulting hybrid structure with uniform CdS nanoparticle distribution. Characterization techniques, including atomic force microscopy (AFM), secondary ion mass spectrometry (SIMS), electron microscopy (SEM) and photoelectrochemical analysis, confirm the successful integration and functional behavior of the obtained PMAA-CdS system and using it for building of 1:2 demultiplexer. Our nanodevice enables the conversion of optical signals into electrical signals, so it can be successfully used to process information at the molecular level.</div></div>","PeriodicalId":315,"journal":{"name":"European Polymer Journal","volume":"228 ","pages":"Article 113838"},"PeriodicalIF":5.8,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143444333","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Accelerating polyester hydrolysis through blending with bio-based poly(4-hydroxyphenylacetate) multiblock copolymers 通过与生物基聚（4-羟基苯乙酸）多嵌段共聚物共混，加速聚酯水解

IF 5.8 2区化学

European Polymer Journal Pub Date : 2025-02-17 DOI: 10.1016/j.eurpolymj.2025.113841

Matina Terzi, Virginia Celestre, Peter Tang, Jeppe Madsen, Anders E. Daugaard

引用次数: 0

Metallopolymers in minutes via organocatalysis: Methods and structure-property relationships 通过有机催化在几分钟内生成金属聚合物：方法和结构-性能关系

IF 5.8 2区化学

European Polymer Journal Pub Date : 2025-02-17 DOI: 10.1016/j.eurpolymj.2025.113840

Grace O. Hammers , Hailey M. Reddersen , Hayden W. Taylor , Ava K. Jarrell , Isabella K. Toole , David V. Price , Cole E. Buller , Mark Turlington , Christopher R. Turlington

引用次数: 0

Inverse vulcanization of all-cis-fluorinated cyclohexylacrylate: Tailored polymers for Li-S battery cathode materials

IF 5.8 2区化学

European Polymer Journal Pub Date : 2025-02-17 DOI: 10.1016/j.eurpolymj.2025.113815

Alexander P. Grimm , Bijian Deng , Shyamkumar V. Haridas , Dominik Voll , Christian W. Schmitt , Max von Delius , Frieder Scheiba , Patrick Théato

{"title":"Inverse vulcanization of all-cis-fluorinated cyclohexylacrylate: Tailored polymers for Li-S battery cathode materials","authors":"Alexander P. Grimm , Bijian Deng , Shyamkumar V. Haridas , Dominik Voll , Christian W. Schmitt , Max von Delius , Frieder Scheiba , Patrick Théato","doi":"10.1016/j.eurpolymj.2025.113815","DOIUrl":"10.1016/j.eurpolymj.2025.113815","url":null,"abstract":"<div><div>The use of elemental sulfur as an alternative feedstock for polymer synthesis by inverse vulcanization has shown to be an elegant, yet simple way towards materials with high sulfur contents. Besides, their use as fertilizers, optical lenses, and heavy metal sorbents, those materials are considered as next generation cathode materials for lithium-sulfur batteries with exceptionally high specific capacities. However, Li-S battery cathodes typically exhibit a rapid capacity fading caused by a phenomenon called ‘polysulfide shuttle-effect’. Herein, we report the synthesis of a terpolymer comprised of all-<em>cis</em>-fluorinated cyclohexyl acrylate and triethoxyvinylsilane via inverse vulcanization in <em>N</em>-methyl-2-pyrrolidone at 150 °C with subsequent silane polycondensation to obtain stable Li-S battery cathodes with sulfur contents of 61 wt%. Electrochemical analysis of Li-S cells showed higher lithium-ion diffusion, superior cycling capacity retention (98 % after 200 cycles at 1C), and suppressed self-discharge (0.02 V after 21 days) compared to the non-fluorinated reference material (38 % capacity retention after 200 cycles at 1C and 0.07 V self-discharge after 21 days). The highly polar nature of fluorinated cyclohexane moieties is believed to significantly inhibit the ‘polysulfide shuttle-effect’, by coordination of polysulfides.</div></div>","PeriodicalId":315,"journal":{"name":"European Polymer Journal","volume":"228 ","pages":"Article 113815"},"PeriodicalIF":5.8,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143464955","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Cationic photocurable epoxy compositions with metallic filler: Influence of monomers and photoinitiators on electrical conductivity

IF 5.8 2区化学

European Polymer Journal Pub Date : 2025-02-16 DOI: 10.1016/j.eurpolymj.2025.113836

Jan Czyzewski , Pawel Stalmach , Mariusz Galek , Filip Petko , Krzysztof Kasza , Joanna Ortyl

{"title":"Cationic photocurable epoxy compositions with metallic filler: Influence of monomers and photoinitiators on electrical conductivity","authors":"Jan Czyzewski , Pawel Stalmach , Mariusz Galek , Filip Petko , Krzysztof Kasza , Joanna Ortyl","doi":"10.1016/j.eurpolymj.2025.113836","DOIUrl":"10.1016/j.eurpolymj.2025.113836","url":null,"abstract":"<div><div>Cationic curable epoxy formulations with metallic fillers are suitable for electrically conductive photocurable systems, due to the shadow cure mechanism efficiently curing material hidden from irradiation between the filler grains. The goal of this study was to examine how the electrical resistivity of the material depends on monomer combinations and photoinitiators (PIs) used, with an emphasis on obtaining low resistivity materials from low viscosity mixtures. A dendritic, silver-coated copper filler was dispersed in mixtures of cycloaliphatic epoxy, oxetanes, and an epoxy reactive diluent with two different PIs. Rheology of the mixtures was studied to distinguish between the influence of the geometric configuration of the filler grains and that of electric contact resistance between them. Temperature scans were run to understand the influence of thermal expansion and glass transition on the resistivity. It was shown that in the intermediate range of the filler content value, between 30 % and 50 %, the resistivity strongly varies with the species and the combination of the monomers used, the PI type, and its concentration. Large part of this variability originates from the contact resistance between the filler grains. Hypothetic mechanisms of variability of the contact resistance were defined, based on chemical and thermal shrinkage in the photocuring, and its possible variability along the path of the curing front propagating between the filler grains. It explains how the effects may emerge but does not tell why different characteristics of the particular PIs used directly influence the effect. Additional experiments were proposed to gather insight into this ambiguity.</div></div>","PeriodicalId":315,"journal":{"name":"European Polymer Journal","volume":"228 ","pages":"Article 113836"},"PeriodicalIF":5.8,"publicationDate":"2025-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143454576","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhancement of toughness and ductility to 1,2,3-triazole Click-cured elastomers via regulation of molecular network and microphase separation

IF 5.8 2区化学

European Polymer Journal Pub Date : 2025-02-15 DOI: 10.1016/j.eurpolymj.2025.113835

Shengda Zhang , Yi He , Shuiping Zhou , Zhuo Wu , Wen Hu , Lin Gan , Xiang Guo , Jin Huang

{"title":"Enhancement of toughness and ductility to 1,2,3-triazole Click-cured elastomers via regulation of molecular network and microphase separation","authors":"Shengda Zhang , Yi He , Shuiping Zhou , Zhuo Wu , Wen Hu , Lin Gan , Xiang Guo , Jin Huang","doi":"10.1016/j.eurpolymj.2025.113835","DOIUrl":"10.1016/j.eurpolymj.2025.113835","url":null,"abstract":"<div><div>Huisgen-click curing systems of 1,3-dipolar cycloaddition are widely employed in solid propellant binders due to their humidity insensitivity and gentle reaction conditions. However, curing systems of multi-azide and alkyne usually suffer network defects due to uncontrollable reaction equivalents and intramolecular cyclization of multi-azide. Moreover, the formed rigid triazole rings further lower mechanical performance by impeding molecular mobility. Herein, a strategy based on a polymeric curing agent with fixed multi-azide functionality and flexible chain was proposed to cure alkyne terminated binder for regulation of the network structure. Meanwhile, the urethane group near the terminal alkyne was introduced into the binder regulating the spatial distribution of rigid triazoles, forming microphase separation, and improving intermolecular forces. A parabolic relationship between mechanical properties and the molar ratio of alkyne/multi-azide was illustrated with peaking near the stoichiometric ratio, which indicates controllable reaction equivalent and prevention of intramolecular cyclization to optimize the network structure. Furthermore, the toughness and elongation at the break of the cured system respectively increased by 781.25% and 524.24% due to the incorporation of urethane. The introduced urethane group induced microphase separation via aggregating hard segments and improving molecular mobility. This strategy depending on the optimization design of molecular network and microphase separation significantly enhances the mechanical properties of solid propellants and shows promising applications in energetic material systems.</div></div>","PeriodicalId":315,"journal":{"name":"European Polymer Journal","volume":"228 ","pages":"Article 113835"},"PeriodicalIF":5.8,"publicationDate":"2025-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143437940","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0