ACS polymers Au最新文献

{"title":"Use of Poly(styrene-co-acrylic Acid) in a Composite Ion-Solvating Membrane for Water Electrolysis","authors":"Domenico Lentini,&nbsp;Francesko Malaj,&nbsp;Alessandro Tampucci,&nbsp;Lorenzo Brogi,&nbsp;Tommaso Caielli,&nbsp;Piercarlo Mustarelli,&nbsp;Pierpaolo Minei,&nbsp;Massimo Melchiorre,&nbsp;Oreste Tarallo,&nbsp;Francesco Ruffo","doi":"10.1021/acspolymersau.5c00126","DOIUrl":"10.1021/acspolymersau.5c00126","url":null,"abstract":"<p>Ion-solvating membranes(ISMs) have recently emerged as a promisingclass of materials for alkaline water electrolysis. Their non microporouspolymer architecture and the absence of alkaline labile functionalgroups pave the way for a new generation of hybrid electrolyzers thatcombine the key features and advantages of conventional alkaline waterelectrolyzers (AWE) with those of proton exchange membrane water electrolyzers(PEMWE). Herein, a styrene-acrylic acid copolymer was synthesizedand deposited onto a commercial microporous polypropylene support,yielding a composite ISM that couples an ion exchange capacity (IEC)of 2.72 mmol g^–1 with good mechanical properties(tensile strength of 65 MPa). The electrochemical performance of themembranes was evaluated by through-plane conductivity measurements(24 mS cm^–1, with KOH 4 M at 70 °C) and operationin an electrolyzer cell (reaching a cell voltage of 1.89 V at a currentdensity of 1 A cm^–2, with KOH 4 M at 70 °C).Polymer stability was assessed by monitoring structural changes via ¹H NMR spectroscopy after an aging treatment in KOH 4 M at70 °C for 720 h. Additionally, long-term electrolysis was investigatedthrough a discontinuous cell test over 150 h. No detectable signsof degradation were observed in either test.</p>","PeriodicalId":72049,"journal":{"name":"ACS polymers Au","volume":"6 1","pages":"256–266"},"PeriodicalIF":6.7,"publicationDate":"2026-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146203916","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"High-Performance Multifunctional rPA6/rCFRP/rGraphite Hybrid Composites from Recycled Industrial Waste","authors":"Erick Gabriel Ribeiro dos Anjos,&nbsp;Rieyssa Maria de Almeida Corrêa,&nbsp;Thiely Ferreira da Silva,&nbsp;Alan Silva dos Santos,&nbsp;Larissa Stieven Montagna,&nbsp;Juliano Marini,&nbsp;Luiz Antonio Pessan,&nbsp;Mirabel Cerqueira Rezende,&nbsp;Fabio Roberto Passador","doi":"10.1021/acspolymersau.5c00178","DOIUrl":"10.1021/acspolymersau.5c00178","url":null,"abstract":"<p>Environmental concerns and the global shift toward amore sustainableand circular economy have increased the demand for economically viablematerials derived from industrial waste. In this study, high-valueengineering materials discarded from different industries were repurposedto develop new multifunctional hybrid composites. The selected postindustrialwaste included polyamide 6 (rPA6) from automotive plastic washers,recycled graphite (rGra), and recycled carbon fiber reinforced polymer(rCFRP) epoxy-based composites originating from the aerospace sector.These materials were separately ground using a knife mill and subsequentlycompounded via extrusion. The fillers (rGra and rCFRP) were incorporatedindividually and as hybrids (rCFRP:rGra, 1:1 wt %) at total loadingsof 5, 10, and 20 wt % in the rPA6 matrix. The composites were characterizedin terms of morphology, rheology, mechanical performance (tensiletest), thermal behavior (differential scanning calorimetry<span></span>DSC),electrical conductivity, and electromagnetic properties. The mechanicalresults revealed a notably high ultimate tensile strength of 126 MPaand an elastic modulus of 4.8 GPa for the rPA6/rCFRP (20 wt %) composition,suggesting strong interfacial adhesion promoted by secondary interactionsbetween the epoxy resin coating on the rCFRP and the rPA6 matrix.Electrical conductivity measurements on composite films showed valuesfrom 10^–5 to 10^–1 S.cm^–1 for the hybrid and rCFRP-filled compositions, indicating their potentialfor antistatic (anti-ESD) applications. Although rGra exhibited lowermechanical and electrical performance than rCFRP at the evaluatedcontents, it was less detrimental to processability, making the hybridformulations more balanced candidates for real-world applications.Overall, this study demonstrates a promising strategy for upcyclingindustrial waste into high-value, multifunctional composites, therebycontributing to resource efficiency and waste minimization acrossvarious industrial sectors.</p>","PeriodicalId":72049,"journal":{"name":"ACS polymers Au","volume":"6 1","pages":"492–505"},"PeriodicalIF":6.7,"publicationDate":"2026-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146203952","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"UHMWPE-Assisted Melt Strength Enhancement of Recycled PLA for Lightweight Foaming","authors":"Rostislav Vilem,&nbsp;Ondrej Mertlik,&nbsp;Tomas Plachy,&nbsp;Lukas Manas,&nbsp;Tomas Sedlacek","doi":"10.1021/acspolymersau.5c00154","DOIUrl":"10.1021/acspolymersau.5c00154","url":null,"abstract":"<p>Increased utilizationof biodegradable polymers to achievesustainabilityand decrease the carbon footprint is connected with a necessity tofind an effective way of their reutilization. Polylactic acid (PLA),and generally all biodegradable polymers, undergoes significant degradationduring reprocessing cycles, leading to inferior products when comparedwith the original material. Here, ultrahigh molecular weight polyethylene(UHMWPE) was incorporated as a reinforcing phase to create a polymer–polymercomposite capable of restoring and enhancing the melt strength ofrecycled PLA. While recycled PLA lost melt strength during reprocessing,limiting its foamability, the UHMWPE/PLA composites exhibited up toa 5.3-fold increase in melt strength, enabling stable cell growthand expansion during foaming. The composite foams also showed a substantialreduction in thermal conductivity to 0.019 W m^–1 K^–1 and a lower density of 0.217 g cm^–3. These improvements originate from the unique combination of UHMWPE/PLAcomposite and filler morphology within the PLA matrix, which reinforcesthe PLA melt and suppresses cell coalescence. The approach under discussionrelies on standard blending and foaming techniques, thus offeringa simple and scalable route for the conversion of reprocessed andrecycled PLA into high-performance, highly expanded foams. These foamscan be used for thermal insulation, protective packaging and lightweightstructural applications.</p>","PeriodicalId":72049,"journal":{"name":"ACS polymers Au","volume":"6 1","pages":"376–387"},"PeriodicalIF":6.7,"publicationDate":"2026-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146203981","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A Practical User Guide to Stress Relaxation Spectra of Dynamic Covalent Networks","authors":"Roy Wink,&nbsp;Oscar B. Geerars,&nbsp;Johan P.A. Heuts,&nbsp;Rint P. Sijbesma","doi":"10.1021/acspolymersau.5c00119","DOIUrl":"10.1021/acspolymersau.5c00119","url":null,"abstract":"<p>Tikhonov regularizationis a powerful method for numericallyextractingrelaxation spectra from transient stress relaxation data, but itspractical use under experimental conditions may be challenging. Inthis Tutorial, we present a systematic simulation study where we evaluatethe effect of common experimental challenges on the accuracy of extractedspectra, including noisy data, limited measurement times, and stretchedor multimodal relaxation behavior. We found that Tikhonov regularizationreliably recovers dominant relaxation times under a wide range ofconditions,but loses resolution when modes overlap or relaxation is incomplete.These results provide practical guidance for interpreting stress relaxationdata. We emphasize that prior knowledge of the underlying chemistryas well as complementary analysis methods remain essential for reliabledetermination of the relaxation time. Together, these insights helpunlock the full potential of relaxation spectra in characterizingdynamic covalent networks.</p>","PeriodicalId":72049,"journal":{"name":"ACS polymers Au","volume":"6 1","pages":"107–116"},"PeriodicalIF":6.7,"publicationDate":"2026-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146203529","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Radiation-Grafted Polymer Electrolyte Membranes for Anhydrous Fuel Cell Operation","authors":"Kevin R. Mecadon,&nbsp;Zois Tsinas,&nbsp;Joseph W. F. Robertson,&nbsp;Markus Bleuel,&nbsp;Eric D. Wachsman,&nbsp;Fred B. Bateman,&nbsp;Mohamad I. Al-Sheikhly","doi":"10.1021/acspolymersau.5c00142","DOIUrl":"10.1021/acspolymersau.5c00142","url":null,"abstract":"<p>Herein, we describe the design, synthesis, and analysisof anhydrousfuel cell membranes that can operate at temperatures above 100 °C,in view of enhanced performance and stability. Traditional polymerelectrolyte membrane fuel cells (PEMFCs) do not operate efficientlyabove 100 °C because water is used as a proton-conductive mediumthrough the Grotthuss hopping mechanism. By substitution of waterwith heterocyclic amine monomers and use of ionizing radiation tograft them onto fluoropolymer films, proton-conductive network solid-statepolymer electrolyte membranes (PEMs) were developed. PEMs were synthesizedusing indirect radiation grafting of the following heterocyclic aminemonomers: 4-vinylpyridine and 5-vinylpyrimidine onto fluorocarbonsubstrates. The resulting PEMs have proton conductivities greaterthan 10^–2 S/cm above 100 °C and perform independentof humidity conditions. These PEMs also demonstrate a positive correlationof increased proton conductivity with increasing temperatures above100 °C. The chemical properties and structures of the graftedmonomers affect the proton-conductive mechanism and performance ofthe PEMs. The data generated through this research will further thedevelopment of anhydrous PEMs through radiation grafting to achievehigher proton conductivity, enhanced performance, and stability.</p>","PeriodicalId":72049,"journal":{"name":"ACS polymers Au","volume":"6 1","pages":"293–304"},"PeriodicalIF":6.7,"publicationDate":"2026-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146203926","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"One Step Block-like Copolymers from an Upcycled Monomer Using Ring-Opening Metathesis Polymerization","authors":"Jeffrey C. Foster,&nbsp;Isaiah T. Dishner,&nbsp;Jackie Zheng,&nbsp;Vera Bocharova,&nbsp;Vilmos Kertesz,&nbsp;Tomonori Saito","doi":"10.1021/acspolymersau.5c00157","DOIUrl":"10.1021/acspolymersau.5c00157","url":null,"abstract":"<p>Block-like copolymers can be readily synthesized in onestep usingmonomers with widely separated reactivity ratios. Here, we show that <em>trans</em>,<em>trans</em>,<em>trans</em>-1,5,9-cyclododecatriene(<strong>CDT</strong>), produced from polybutadiene via cyclodepolymerization(CDP), undergoes gradient copolymerization via ring-opening metathesispolymerization (ROMP) with a selected norbornene monomer to producea block-like copolymer that exhibits bulk nanophase separation andexcellent thermomechanical performance. These data highlight a newROMP copolymerization system with a sharp compositional drift andintroduce a simple pathway to convert waste plastic into a valuablebuilding block for high-value thermoplastic materials.</p>","PeriodicalId":72049,"journal":{"name":"ACS polymers Au","volume":"6 1","pages":"399–404"},"PeriodicalIF":6.7,"publicationDate":"2026-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146203936","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Copolymers of NVAm and NVP for Efficient Gene Delivery","authors":"Tom Fielitz,&nbsp;Christopher Raab,&nbsp;Vitalii Tkachenko,&nbsp;Kristine M. Oleszkiewicz,&nbsp;Hendrik Fuchs,&nbsp;Matthias Hartlieb","doi":"10.1021/acspolymersau.5c00167","DOIUrl":"10.1021/acspolymersau.5c00167","url":null,"abstract":"<p>Gene delivery lies at the heart of many approaches fortreatinga host of different diseases. Promising candidates for the deliveryof genetic material are polycationic vectors; however, managing toxicityarising from adverse interactions with the lipid bilayer remains achallenge. In this work, photoiniferter reversible addition–fragmentationchain-transfer (PI-RAFT) polymerization was used to synthesize statisticalcopolymers of <em>N-</em>vinyl formamide (NVF) and <em>N</em>-vinyl pyrrolidone (NVP). Subsequent selective hydrolysisof NVF was used to introduce polyvinyl amine (PVAm) repeats. The resultinglibrary of polymers with varying charge densities and molar masseswas probed for biocompatibility with erythrocytes and MDA-MB-468 cells,revealing substantially reduced cytotoxicity compared with linearpolyethylene imine (lPEI) and Lipofectamine 2000. Using an ethidiumbromide (EtBr) replacement assay, PVAm copolymers were shown to replaceEtBr at low N/P-ratios. The transfection conditions were optimizedin terms of the N/P-ratio and polyplex concentration by a <em>Renilla</em> luciferase reporter assay. This revealed 30-foldless cytotoxicity, a much wider viable concentration range, and a2-fold greater transfection efficiency for the PVAm copolymer comparedto lPEI. This study provides insights into the PI-RAFT copolymerizationof the less activated monomers NVF and NVP and highlights the potentialof polyvinyl amine copolymers resulting from selective hydrolysisfor the transfection of genetic material compared with lPEI.</p>","PeriodicalId":72049,"journal":{"name":"ACS polymers Au","volume":"6 1","pages":"426–436"},"PeriodicalIF":6.7,"publicationDate":"2026-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146203728","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of Hyperbranched Polyethylenimine on the Properties of Commercial Epoxy Resins for Composite Applications","authors":"Zois Tsinas,&nbsp;Ajay Krishnamurthy,&nbsp;Qi An,&nbsp;Ran Tao,&nbsp;Amanda L. Forster,&nbsp;Aaron M. Forster","doi":"10.1021/acspolymersau.5c00141","DOIUrl":"10.1021/acspolymersau.5c00141","url":null,"abstract":"<p>Hyperbranched polymers are commonly used as surface andcure modifiers,along with nanoparticles, of epoxy resins used in medical and infrastructureapplications; however, their impact on structure and performance ofthe epoxy resins is not fully understood. Here, a commercial epoxy-aromaticamine resin (EP-AA) system is blended with off-stoichiometric amountsof hyperbranched amine (HA), and the cure kinetics, structure, polymerdynamics, and mechanical properties of the different compositionsare evaluated. Cure kinetic studies indicate that the curing of thehyperbranched amine is nearly complete prior to that of the aromaticamines. At its highest concentration (1% by mass), the hyperbranchedamine is found to autocatalyze the epoxy and the aromatic amine cure,but the bulky HA groups slow the diffusion kinetics during the finalstages of the cure process. This results in a heterogeneous, cocontinuousnetwork structure consisting of unreacted secondary amines that increasethe side-group/pendant contribution and increase the free volume withinthe polymer network. The restricted cooperative segmental mobilityof the polymer network in the 1% by mass HA blend results in poorenergy dissipative properties, as evidenced by reduced strength andstrain to failure.</p>","PeriodicalId":72049,"journal":{"name":"ACS polymers Au","volume":"6 1","pages":"278–292"},"PeriodicalIF":6.7,"publicationDate":"2026-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146203983","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"ACS Polymers Au Recognizes the 2025 Rising Stars in Polymer Science","authors":"Sebastien Perrier,&nbsp;Graham Smeddle","doi":"10.1021/acspolymersau.5c00202","DOIUrl":"10.1021/acspolymersau.5c00202","url":null,"abstract":"","PeriodicalId":72049,"journal":{"name":"ACS polymers Au","volume":"6 1","pages":"1–5"},"PeriodicalIF":6.7,"publicationDate":"2026-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146203968","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Formulation and 3D Printing of PVDF-Containing Photocurable Resins for Digital Light Processing","authors":"Megan McGeehan,&nbsp;Étienne Durand-Laberge,&nbsp;Matthieu Gervais,&nbsp;Sébastien Roland,&nbsp;Audrey Laventure","doi":"10.1021/acspolymersau.5c00113","DOIUrl":"10.1021/acspolymersau.5c00113","url":null,"abstract":"<p>Additive manufacturing of electroactive polymers offerstransformativepotential for flexible electronics and smart devices, yet preservingthe microstructure responsible for the electroactive property duringprocessing remains a challenge. Here, we report a digital light processing(DLP) approach formulated without any volatile organic solvent toprepare poly­(vinylidene fluoride) (PVDF)-based composites under ambientconditions, employing 1,6-hexanediol dimethacrylate (HDDMA) as a polymerizablematrix and phenylbis­(2,4,6-trimethylbenzoyl)­phosphine oxide (BAPO)as an efficient visible-light photoinitiator. Unlike conventionalsolvent-based methods relying on PVDF dissolution, this formulationenables direct dispersion of PVDF particles in the photocurable resinwithout the use of organic solvents that are typically used in theprocessing of PVDF. Formulation optimization enabled stable suspensionsof PVDF up to 35 wt %, with rheological and optical properties leadingto high-fidelity DLP printed samples. Atomic force microscopy (AFM)of cross sections of the 3D printed sample revealed uniform dispersionof PVDF-rich domains. Comprehensive characterization of the 3D printedsample using differential scanning calorimetry (DSC), infrared spectroscopy(IR), and X-ray diffraction confirmed the retention of the pristinePVDF’s semicrystalline phases postprocessing. Preprinting modificationof the PVDF and postprinting modifications of the 3D printed compositewere conducted to confirm this observation. For instance, solvent-precipitatedPVDF with enhanced β phase fraction, which is often associatedwith electroactivity, was used in the formulation without phase degradationduring photopolymerization and postprint annealing of the 3D printedcomposite provided additional phase tuning, underscoring the versatilityof this approach. This work establishes DLP as a robust platform forthe additive manufacturing PVDF-based composites, allowing for precisecontrol and retention over crystalline phase content and complex architectures,potentially relevant for electroactive applications in next-generationflexible electronics.</p>","PeriodicalId":72049,"journal":{"name":"ACS polymers Au","volume":"6 1","pages":"203–213"},"PeriodicalIF":6.7,"publicationDate":"2026-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146203897","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}