Macromolecules最新文献_第4页

Origin of the Free Surface Effect of Polymers with Different Sizes of Side Groups 具有不同大小侧基的聚合物自由表面效应的起源

IF 5.5 1区化学

Macromolecules Pub Date : 2024-11-26 DOI: 10.1021/acs.macromol.4c01910

Zhenwei Jiang, Weihang Tian, Wenwu Weng, Xiaozhi Zhan, Xianjing Zhou, Jianquan Xu, Tao Zhu, Xinping Wang

{"title":"Origin of the Free Surface Effect of Polymers with Different Sizes of Side Groups","authors":"Zhenwei Jiang, Weihang Tian, Wenwu Weng, Xiaozhi Zhan, Xianjing Zhou, Jianquan Xu, Tao Zhu, Xinping Wang","doi":"10.1021/acs.macromol.4c01910","DOIUrl":"https://doi.org/10.1021/acs.macromol.4c01910","url":null,"abstract":"The free surface effect in nanoconfined polymer systems is important. Hence, understanding the influence of polymer structures on the free surface effect is essential. Herein, the dynamics of the free surface of polystyrene, poly(4-methylstyrene), and poly(4-tert-butylstyrene) with p-substituted methyl and tert-butyl groups in the benzene ring were investigated. An enhanced free surface effect was exhibited by polymers with large side groups and high fragility, which was attributed to the high free volume of the surface and the long distance for this unusual free volume to propagate into the bulk. This phenomenon was proven by deuterium oxide vapor penetration into the film surface via neutron reflectivity. High levels of packing frustration could be relieved on the free surface of fragile polymers during film formation; the chain packing efficiency on the surface was reduced, resulting in a large and broad free volume distribution on the free surface. This study provides a deep understanding of the relationship between the free surface effect and the chemical and physical properties of polymers.","PeriodicalId":51,"journal":{"name":"Macromolecules","volume":"65 1","pages":""},"PeriodicalIF":5.5,"publicationDate":"2024-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142712827","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Correlation Between Segmental Order Parameter and Entanglement Length in a Monodisperse Comb Polymer 单分散梳状聚合物中段阶参数与纠缠长度之间的相关性

IF 5.5 1区化学

Macromolecules Pub Date : 2024-11-25 DOI: 10.1021/acs.macromol.4c02015

Farhad Shahsavan, Jonas Keller, Manfred Wilhelm, Kay Saalwächter

{"title":"Correlation Between Segmental Order Parameter and Entanglement Length in a Monodisperse Comb Polymer","authors":"Farhad Shahsavan, Jonas Keller, Manfred Wilhelm, Kay Saalwächter","doi":"10.1021/acs.macromol.4c02015","DOIUrl":"https://doi.org/10.1021/acs.macromol.4c02015","url":null,"abstract":"The motion of a polymer chain within a hypothetical confining tube gives rise to a segmental order parameter Sb. This parameter is assessed via multiple-quantum (MQ) NMR experiments, providing a valuable molecule-level rheological observable. In both polymer networks and entangled melts, the order parameter is proportional to the inverse of the number of segments between two covalent cross-links or physical entanglements. In entangled polymer networks, the entanglements have usually been considered as additional but temporary cross-links and the contribution of the physical and chemical constraints are assumed additive. Recent computer simulation results challenged this assumption for lowly cross-linked polymer networks; instead, Sb was shown to scale with (NeNc)−1/2, Nc and Ne being the number of segments between cross-links and entanglements, respectively [Lang, M.; Sommer, J.-U., Phys. Rev. Lett. 2010, 104, 177801]. An experimental confirmation remains elusive due to challenges in distinguishing the contributions of entanglements and cross-links, as well as the long averaging time scales involved. In this study, we assess this correlation by examining chain dynamics in a monodisperse polyisoprene comb, utilized as a model system. To model chain dynamics in this system, the dynamic tube dilation model, originally designed for predicting the rheological behavior of star and branched polymers, has been modified to facilitate its application in the analysis of MQ NMR signals. We also address some of its shortcomings.","PeriodicalId":51,"journal":{"name":"Macromolecules","volume":"256 1","pages":""},"PeriodicalIF":5.5,"publicationDate":"2024-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142696955","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Ortho-, Meta-, versus Para-Substituted Mesogens Inducing Higher-Order Structures for Highly Thermal-Conductive Cured Epoxy Resins 正、元、对取代中间体诱导高导热固化环氧树脂的高阶结构

IF 5.5 1区化学

Macromolecules Pub Date : 2024-11-24 DOI: 10.1021/acs.macromol.4c00506

Rika Marui, Hayato Maeda, Kan Hatakeyama-Sato, Yuta Nabae, Teruaki Hayakawa

引用次数: 0

Pendant Hydroxy Polyethylene Reactive Additives for Improved Mechanical Properties and Melt Processability of Poly(ethylene terephthalate)/Polyethylene Blends 用于改善聚对苯二甲酸乙二酯/聚乙烯混合物机械性能和熔融加工性的羟基聚乙烯反应添加剂

IF 5.5 1区化学

Macromolecules Pub Date : 2024-11-24 DOI: 10.1021/acs.macromol.4c01329

Erin M. Maines, Aristotelis Zografos, Caitlin S. Sample, Aristotle J. Zervoudakis, Theresa M. Reineke, Christopher J. Ellison

{"title":"Pendant Hydroxy Polyethylene Reactive Additives for Improved Mechanical Properties and Melt Processability of Poly(ethylene terephthalate)/Polyethylene Blends","authors":"Erin M. Maines, Aristotelis Zografos, Caitlin S. Sample, Aristotle J. Zervoudakis, Theresa M. Reineke, Christopher J. Ellison","doi":"10.1021/acs.macromol.4c01329","DOIUrl":"https://doi.org/10.1021/acs.macromol.4c01329","url":null,"abstract":"Reactive compatibilization is an attractive solution to improve the mechanical properties of polymer blends that inherently result from plastic recycling processes. In this study, pendant hydroxy polyethylene reactive additives were synthesized through ring-opening metathesis polymerization (ROMP) and their ability to compatibilize poly(ethylene terephthalate) (PET)/polyethylene blends through reactive compatibilization was evaluated. The ROMP synthesis strategy enabled the deconvolution of the effects of overall number-average molar mass (Mn) and average molar mass between reactive hydroxy groups (Mg) on compatibilization effectiveness. The results of this study suggest a near-optimal Mg ∼ 1 kg/mol where the strain at break (εb) of the blend with 1 wt % additive is increased significantly (εb ∼ 280%) over the neat blend without the additive (εb ∼ 16%), independent of Mn. Near-optimal Mg additives were effective at industrially relevant reaction times of 5–10 min, at loadings as low as 0.5 wt %, and in blends containing one of two different types of PET, suggesting their versatility and commercial applicability. Extensional viscosity was characterized and melt strain hardening (MSH) was observed to be highly dependent on the viscosity ratio between the matrix and dispersed phases, which is a function of temperature. When MSH is present, we show that reactive compatibilizers capable of forming branched reaction products offer an improvement to the MSH, compared to linear analogues. These findings suggest that branched compatibilizers may be advantageous for melt processability of compatibilized recyclates in processes dominated by strong extensional flows, such as film blowing, foaming, and thermoforming.","PeriodicalId":51,"journal":{"name":"Macromolecules","volume":"9 1","pages":""},"PeriodicalIF":5.5,"publicationDate":"2024-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142696956","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

A High-Order Double Network Hydrogel 高阶双网络水凝胶

IF 5.5 1区化学

Macromolecules Pub Date : 2024-11-23 DOI: 10.1021/acs.macromol.4c01880

Penghui Xia, Wanqi Zhang, Chaoyi Peng, Hanfeng Yin, Dan Michelle Wang, Jun Yang, Rocky S. Tuan, Lei Jiang, Jianfeng Wang

{"title":"A High-Order Double Network Hydrogel","authors":"Penghui Xia, Wanqi Zhang, Chaoyi Peng, Hanfeng Yin, Dan Michelle Wang, Jun Yang, Rocky S. Tuan, Lei Jiang, Jianfeng Wang","doi":"10.1021/acs.macromol.4c01880","DOIUrl":"https://doi.org/10.1021/acs.macromol.4c01880","url":null,"abstract":"Natural hydrogels, such as cartilage, have a multiscale hierarchical structure composed of multiple modulus-contrasting building blocks, bringing about their extraordinary mechanical properties. Conventional tough engineering hydrogels, such as Double Network (DN) hydrogel, lack cartilage’s high-order aggregated structure across multiple length scales, although they have a molecular composition similar to cartilage. This work focuses on high-order architecture in DN hydrogels through superimposing microphase separation and nanocrystalline domains in interpenetrating molecular networks of stiff chitosan and soft poly(vinyl alcohol) by using freezing-thawing-assisted alkali out. The constructed High-order Double Network (HDN) architecture has a molecular composition identical to initial interpenetrating molecular networks but exhibits hierarchical multiscale discrepancies, including bicontinuous phase at microscale, nanocrystalline domains at nanoscale, and polymer chain packing at subnanoscale. We find that these structural differences are strongly correlated with the macroscopic properties of the hydrogel, such as turbidity, stiffness, strength, and toughness. We reveal the stepwise multiscale fracture mechanism of the HDN architecture that leads to a highly synergistic toughening effect. The HDN hydrogel also exhibits excellent multifunctional properties, including antiswelling, durability, biocompatibility, antibacterial activity, degradability, and plasticity. We believe that the high-order architecture presented in this work would shed new light on the future development of high-performance DN hydrogels that approximate natural hydrogels.","PeriodicalId":51,"journal":{"name":"Macromolecules","volume":"9 1","pages":""},"PeriodicalIF":5.5,"publicationDate":"2024-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142690631","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Functionalized Polyolefins Produced by Post-Metallocenes; High Added Value Materials, but Can They Be Produced Efficiently? 后茂金属生产的功能化聚烯烃；高附加值材料，但能否高效生产？

IF 5.5 1区化学

Macromolecules Pub Date : 2024-11-22 DOI: 10.1021/acs.macromol.4c01602

Wojciech Szot, Debashis Chakraborty, Miloud Bouyahyi, Lidia Jasinska-Walc, Rob Duchateau

{"title":"Functionalized Polyolefins Produced by Post-Metallocenes; High Added Value Materials, but Can They Be Produced Efficiently?","authors":"Wojciech Szot, Debashis Chakraborty, Miloud Bouyahyi, Lidia Jasinska-Walc, Rob Duchateau","doi":"10.1021/acs.macromol.4c01602","DOIUrl":"https://doi.org/10.1021/acs.macromol.4c01602","url":null,"abstract":"Randomly functionalized polyolefins produced by catalysis have received increasing attention owing to their well-defined molecular structures, uniform distribution, and variety in types of functionalities. Herein, we investigate the scalability of the production of hydroxyl-functionalized propylene copolymers via a high temperature solution polymerization process using aluminum trialkyls as passivating agents. Initially, we evaluated the impact of (i) the type of passivating agent (triethylaluminum versus triisobutylaluminum) and (ii) the distance between the hydroxyl and olefin functionality within the functionalized comonomer on the catalytic activity and the functional comonomer incorporation efficiency. Both the functional comonomer’s chain length and the type of trialkylaluminum passivating agent have a profound effect on the incorporation efficiency. Subsequently, deeper insight into the origin of the catalyst poisoning by trialkylaluminum-passivated hydroxyl-functionalized comonomers reveals that catalyst deactivation solely happens after incorporation of the functional comonomer and not by coordination of the oxygen of the functional comonomers present in the reaction system. During recycling of dialkylaluminum alkenolates by means of distillation, the occurrence of carbo- and/or hydroalumination side reactions were noticed, triggered by the presence of dialkylaluminum hydrides formed by thermolysis of excess aluminum trialkyls. Exchanging aluminum trialkyls by dialkylaluminum alkoxides as scavengers solved this problem. Modeling studies revealed the impact of the higher nuclearity of trialkylaluminum-passivated hydroxyl-functionalized comonomers on their incorporation efficiency. Addition of a saturated alcohol significantly improved the incorporation efficiency of the functional comonomer, thus bringing the scalability (i.e., enhance the productivity and cost-efficiency) of the copolymerization process a step closer.","PeriodicalId":51,"journal":{"name":"Macromolecules","volume":"254 1","pages":""},"PeriodicalIF":5.5,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142684843","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

A Bayesian Inference Approach to Accurately Fitting the Glass Transition Temperature in Thin Polymer Films 准确拟合聚合物薄膜玻璃转化温度的贝叶斯推理方法

IF 5.5 1区化学

Macromolecules Pub Date : 2024-11-22 DOI: 10.1021/acs.macromol.4c01867

James H. Merrill, Yixuan Han, Connie B. Roth

{"title":"A Bayesian Inference Approach to Accurately Fitting the Glass Transition Temperature in Thin Polymer Films","authors":"James H. Merrill, Yixuan Han, Connie B. Roth","doi":"10.1021/acs.macromol.4c01867","DOIUrl":"https://doi.org/10.1021/acs.macromol.4c01867","url":null,"abstract":"We present a Bayesian inference-based nonlinear least-squares fitting approach developed to reliably fit challenging, noisy data in an automated and robust manner. The advantages of using Bayesian inference for nonlinear fitting are demonstrated by applying this approach to a set of temperature-dependent film thickness h(T) data collected by ellipsometry for thin films of polystyrene (PS) and poly(2-vinylpyridine) (P2VP). The glass transition experimentally presents as a continuous transition in thickness characterized by a change in slope that in thin films with broadened transitions can become particularly subtle and challenging to fit. This Bayesian fitting approach is implemented using existing open-source Python libraries that make these powerful methods accessible with desktop computers. We show how this Bayesian approach is more versatile and robust than existing methods by comparing it to common fitting methods currently used in the polymer science literature for identifying Tg. As Bayesian inference allows for fitting to more complex models than existing methods in the literature do, our discussion includes an in-depth evaluation of the best functional form for capturing the behavior of h(T) data with temperature-dependent changes in thermal expansivity. This Bayesian fitting approach is easily automated, capable of reliably fitting noisy and challenging data in an unsupervised manner, and ideal for machine learning approaches to materials development.","PeriodicalId":51,"journal":{"name":"Macromolecules","volume":"254 1","pages":""},"PeriodicalIF":5.5,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142685036","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Synthesis of Semiaromatic AA/BB-Type Polyamides via Chemoenzymatic Polycondensation 通过化学酶促缩聚合成半芳香 AA/BB 型聚酰胺

IF 5.5 1区化学

Macromolecules Pub Date : 2024-11-22 DOI: 10.1021/acs.macromol.4c02125

Yusuke Ueno, Kousuke Tsuchiya, Hiroyasu Masunaga, Keiji Numata

{"title":"Synthesis of Semiaromatic AA/BB-Type Polyamides via Chemoenzymatic Polycondensation","authors":"Yusuke Ueno, Kousuke Tsuchiya, Hiroyasu Masunaga, Keiji Numata","doi":"10.1021/acs.macromol.4c02125","DOIUrl":"https://doi.org/10.1021/acs.macromol.4c02125","url":null,"abstract":"Polypeptide-based AA/BB-type polyamides containing aromatic moieties in the main chains were synthesized via chemoenzymatic polycondensation of diamine and diester-type aromatic monomers through the use of papain in aqueous buffers. To mitigate the low substrate recognition of papain by aromatic units, aromatic diamines, such as 1,3-phenylenediamine (Pda), 2,4-diaminoanisole (Dan) and 2,4-diaminophenol (Dap), and aromatic diacids, such as 5-aminoisophthalic acid (Aip), were modified with glycine. The diamine monomers GlyPdaGly, GlyDanGly and GlyDapGly and diester monomer GlyAipGly were used for polycondensation in the presence of papain, resulting in the formation of the AA/BB-type polyamides poly(GlyPdaGly-alt-GlyAipGly) (AP(GG)), poly(GlyDanGly-alt-GlyAipGly) (AP(GG)OMe) and poly(GlyDapGly-alt-GlyAipGly) (AP(GG)OH). Structural analysis of the polyamides via Fourier transform infrared (FT-IR) spectroscopy and wide-angle X-ray diffraction (WAXD) revealed that the AP(GG) series was largely amorphous, resulting from a reduction in the hydrogen bonding of PolyGly due to the inclusion of aromatic moieties in the main chain. Thermal analysis of the AP(GG) series revealed high thermal stability and thermoplasticity, which are caused by the rigid structure of the benzene ring and the amorphous structure of the polyamides. The postpolycondensation products of AP(GG), AP(GG)OMe and AP(GG)OH formed hyperbranched/networked structures via amidation of Aip amines. Notably, chemoenzymatic polymerization followed by postpolycondensation provided peptide-based semiaromatic polyamides with high thermal stability.","PeriodicalId":51,"journal":{"name":"Macromolecules","volume":"129 1","pages":""},"PeriodicalIF":5.5,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142685038","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Critical Importance of Both Bond Breakage and Network Heterogeneity in Hysteresis Loop on Stress–Strain Curves and Scattering Patterns 应力-应变曲线和散射模式中磁滞环的键断裂和网络异质性的关键重要性

IF 5.5 1区化学

Macromolecules Pub Date : 2024-11-21 DOI: 10.1021/acs.macromol.4c01996

Katsumi Hagita, Takahiro Murashima

{"title":"Critical Importance of Both Bond Breakage and Network Heterogeneity in Hysteresis Loop on Stress–Strain Curves and Scattering Patterns","authors":"Katsumi Hagita, Takahiro Murashima","doi":"10.1021/acs.macromol.4c01996","DOIUrl":"https://doi.org/10.1021/acs.macromol.4c01996","url":null,"abstract":"This study demonstrates the importance of both breakable bond potentials and the heterogeneity of cross-linked network structures in reproducing hysteresis loops on stress–strain curves through coarse-grained molecular dynamics simulations. We prepared a parametrized bond breakage model in coarse-grained molecular dynamics simulations for flexible polymers. As a simple model of a heterogeneous network structure, we present a diamond lattice-like bimodal network wherein the number of particles between cross-links was randomly set as (Ns ± Nb), where Ns and Nb represent the average number and bimodal amplitude, respectively. For a regular network (Nb = 0) under uniaxial stretching, total failure occurred at a certain strain at which multiple bonds broke instantaneously. By contrast, the heterogeneous network (Nb ≃ Ns/2) broke down gradually and locally. Analyses through two-dimensional scattering patterns (2DSPs) and local bond statistics revealed the failure behaviors of the network. For the shorter links between cross-links, the bond was broken by the smallest strain. Bond breakage generates large voids, which can be observed as a characteristic behavior of 2DSPs. We confirmed that the stress–strain curves for multiple cycles showed hysteresis loops that originated from bond breakage. Systematic change of bond breakage criteria was confirmed to be important in controlling the shape of the hysteresis loop, which is required for comparison with experiments.","PeriodicalId":51,"journal":{"name":"Macromolecules","volume":"192 1","pages":""},"PeriodicalIF":5.5,"publicationDate":"2024-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142678671","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Thermoresponsive Polymer Sorbents for Efficient Removal of Perfluorinated Compounds via Simple Heating 通过简单加热高效去除全氟化合物的热致伸缩性聚合物吸附剂

IF 5.5 1区化学

Macromolecules Pub Date : 2024-11-21 DOI: 10.1021/acs.macromol.4c01868

Xiao Tan, Yiqing Wang, Zhuojing Yang, Yutong Zhu, Chunrong Yu, Kehan Liu, Yutong He, Andrew K. Whittaker, Cheng Zhang

{"title":"Thermoresponsive Polymer Sorbents for Efficient Removal of Perfluorinated Compounds via Simple Heating","authors":"Xiao Tan, Yiqing Wang, Zhuojing Yang, Yutong Zhu, Chunrong Yu, Kehan Liu, Yutong He, Andrew K. Whittaker, Cheng Zhang","doi":"10.1021/acs.macromol.4c01868","DOIUrl":"https://doi.org/10.1021/acs.macromol.4c01868","url":null,"abstract":"The efficient removal of per- and polyfluoroalkyl substances (PFAS) and recycling sorbents from contaminated water face grand challenges in the field of PFAS remediation. In this work, a series of thermoresponsive perfluoropolyether (PFPE)-containing polymer sorbents were developed for efficient removal of PFAS from contaminated water using a simple heating process. The polymer sorbents are thermoresponsive due to inclusion of the monomer N-isopropylacrylamide (NIPAM). Four block copolymers with the same degree of polymerization (DP) of [2-(acryloyloxy)ethyl]trimethylammonium iodide (AETAI) but increasing DPs of NIPAM were prepared via reversible addition–fragmentation chain-transfer (RAFT) polymerization. The results demonstrate that the balance between hydrophobic/hydrophilic segments from the polymers significantly influences their lower critical transition temperatures (LCSTs), and such balance could be altered by the presence of amphiphilic PFAS. Upon complete sorption, >99% removal for majority of the tested PFAS was achieved by heating the solution mixture to above its lower critical solution temperature and filtration. The study introduces the design and preparation of efficient “smart” PFAS sorbents based on their thermoresponsive properties, offering a new approach to effectively separate PFAS sorbents from treated solutions.","PeriodicalId":51,"journal":{"name":"Macromolecules","volume":"61 1","pages":""},"PeriodicalIF":5.5,"publicationDate":"2024-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142684845","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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