ACS polymers Au最新文献

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Hierarchically Porous Polyacetylene Networks: Adsorptive Photocatalysts for Efficient Bisphenol A Removal from Water 分层多孔聚乙炔网络:高效去除水中双酚 A 的吸附性光催化剂
IF 4.7
ACS polymers Au Pub Date : 2024-06-05 DOI: 10.1021/acspolymersau.4c0003210.1021/acspolymersau.4c00032
David Šorm, Jiří Brus, Albin Pintar, Jan Sedláček and Sebastijan Kovačič*, 
{"title":"Hierarchically Porous Polyacetylene Networks: Adsorptive Photocatalysts for Efficient Bisphenol A Removal from Water","authors":"David Šorm,&nbsp;Jiří Brus,&nbsp;Albin Pintar,&nbsp;Jan Sedláček and Sebastijan Kovačič*,&nbsp;","doi":"10.1021/acspolymersau.4c0003210.1021/acspolymersau.4c00032","DOIUrl":"https://doi.org/10.1021/acspolymersau.4c00032https://doi.org/10.1021/acspolymersau.4c00032","url":null,"abstract":"<p >In this article, we report a series of functionalized polyacetylene-type networks formed by chain-growth insertion coordination polymerization in high internal phase emulsions (HIPEs). All polymerized HIPEs (polyHIPEs) contain a hierarchically structured, 3D-interconnected porous framework consisting of a micro-, meso- and macropore system, resulting in exceptionally high specific surface areas (up to 1055 m<sup>2</sup>·g<sup>–1</sup>) and total porosities of over 95%. The combination of π-conjugated and hierarchically porous structure in one material enabled the use of these polyacetylene polyHIPEs as adsorptive photocatalysts for the removal of chemical contaminants from water. All polyacetylene polyHIPEs demonstrated high efficiency in the adsorption of bisphenol A from water (up to 48%) and the subsequent photocatalytic degradation. Surprisingly, high adsorption capacity did not affect the photocatalytic efficiency (up to 58%). On the contrary, this dual function seems to be very promising, as some polyacetylene polyHIPEs almost completely removed bisphenol A from water (97%) through the adsorption-photooxidation mechanism. It also appears that the presence of polar functional side groups in the polyacetylene backbone improves the contact of the polyacetylene network with the aqueous bisphenol A solution, which can thus be more easily adsorbed and subsequently oxidized, compensating for the lower specific surface area of some networks, namely, 471 and 308 m<sup>2</sup>·g<sup>–1</sup> in the case of 3-ethynylphenol- and 3-ethynylaniline-based polyacetylene polyHIPEs, respectively.</p>","PeriodicalId":72049,"journal":{"name":"ACS polymers Au","volume":"4 5","pages":"420–427 420–427"},"PeriodicalIF":4.7,"publicationDate":"2024-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acspolymersau.4c00032","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142402791","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Microfluidic Controlled Self-Assembly of Polylactide (PLA)-Based Linear and Graft Copolymers into Nanoparticles with Diverse Morphologies 基于聚乳酸 (PLA) 的线性和接枝共聚物通过微流体控制自组装成具有不同形态的纳米颗粒
IF 4.7
ACS polymers Au Pub Date : 2024-05-31 DOI: 10.1021/acspolymersau.4c0003310.1021/acspolymersau.4c00033
Svetlana Lukáš Petrova*, Vladimir Sincari, Ewa Pavlova, Václav Pokorný, Volodymyr Lobaz and Martin Hrubý, 
{"title":"Microfluidic Controlled Self-Assembly of Polylactide (PLA)-Based Linear and Graft Copolymers into Nanoparticles with Diverse Morphologies","authors":"Svetlana Lukáš Petrova*,&nbsp;Vladimir Sincari,&nbsp;Ewa Pavlova,&nbsp;Václav Pokorný,&nbsp;Volodymyr Lobaz and Martin Hrubý,&nbsp;","doi":"10.1021/acspolymersau.4c0003310.1021/acspolymersau.4c00033","DOIUrl":"https://doi.org/10.1021/acspolymersau.4c00033https://doi.org/10.1021/acspolymersau.4c00033","url":null,"abstract":"<p >This study outlines the microfluidic (MF) controlled self-assembly of polylactide (PLA)-based linear and graft copolymers. The PLA-based copolymers (PLA-Cs) were synthesized through a convenient one-pot/one-step ROP/RAFT technique. Three distinct vinyl monomers─triethylene glycol methacrylate (TEGMA), 2-hydroxypropyl methacrylate (HPMA), and <i>N</i>-(2-hydroxypropyl) methacrylamide (HPMAA) were employed to prepare various copolymers: linear thermoresponsive polylactide-<i>b</i>-poly(triethylene glycol methacrylate) (PLA-<i>b</i>-PTEGMA), graft pseudothermoresponsive poly[<i>N</i>-(2-hydroxypropyl)] methacrylate-<i>g</i>-polylactide (PHPMA-<i>g</i>-PLA), and graft amphiphilic poly[<i>N</i>-(2-hydroxypropyl)] methacrylamide-<i>g</i>-polylactide (PHPMAA-<i>g</i>-PLA). The MF technology was utilized for the controlled self-assembly of these PLA-based BCs in a solution, resulting in a range of nanoparticle (NP) morphologies. The thermoresponsive PLA-<i>b</i>-PTEGMA diblock copolymer formed thermodynamically stable micelles (Ms) through kinetically controlled assemblies. Similarly, employing MF channels led to the self-assembly of PHPMA-<i>g</i>-PLA, yielding polymersomes (PSs) with adjustable sizes under the same solution conditions. Conversely, the PHPMAA-<i>g</i>-PLA copolymer generated worm-like particles (Ws). The analysis of resulting nano-objects involves techniques such as transmission electron microscopy, dynamic light scattering investigations (DLS), and small-angle X-ray scattering (SAXS). More specifically, the thermoresponsive behavior of PLA-<i>b</i>-PTEGMA and PHPMA-<i>g</i>-PLA nano-objects is validated through variable-temperature DLS, TEM, and SAXS methods. Furthermore, the study explored the specific interactions between the formed Ms, PSs, and/or Ws with proteins in human blood plasma, utilizing isothermal titration calorimetry.</p>","PeriodicalId":72049,"journal":{"name":"ACS polymers Au","volume":"4 4","pages":"331–341 331–341"},"PeriodicalIF":4.7,"publicationDate":"2024-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acspolymersau.4c00033","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141977815","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Microfluidic Controlled Self-Assembly of Polylactide (PLA)-Based Linear and Graft Copolymers into Nanoparticles with Diverse Morphologies 基于聚乳酸 (PLA) 的线性和接枝共聚物通过微流体控制自组装成具有不同形态的纳米颗粒
ACS polymers Au Pub Date : 2024-05-31 DOI: 10.1021/acspolymersau.4c00033
Svetlana Lukáš Petrova, Vladimir Sincari, Ewa Pavlova, Václav Pokorný, Volodymyr Lobaz, Martin Hrubý
{"title":"Microfluidic Controlled Self-Assembly of Polylactide (PLA)-Based Linear and Graft Copolymers into Nanoparticles with Diverse Morphologies","authors":"Svetlana Lukáš Petrova, Vladimir Sincari, Ewa Pavlova, Václav Pokorný, Volodymyr Lobaz, Martin Hrubý","doi":"10.1021/acspolymersau.4c00033","DOIUrl":"https://doi.org/10.1021/acspolymersau.4c00033","url":null,"abstract":"This study outlines the microfluidic (MF) controlled self-assembly of polylactide (PLA)-based linear and graft copolymers. The PLA-based copolymers (PLA-Cs) were synthesized through a convenient one-pot/one-step ROP/RAFT technique. Three distinct vinyl monomers─triethylene glycol methacrylate (TEGMA), 2-hydroxypropyl methacrylate (HPMA), and <i>N</i>-(2-hydroxypropyl) methacrylamide (HPMAA) were employed to prepare various copolymers: linear thermoresponsive polylactide-<i>b</i>-poly(triethylene glycol methacrylate) (PLA-<i>b</i>-PTEGMA), graft pseudothermoresponsive poly[<i>N</i>-(2-hydroxypropyl)] methacrylate-<i>g</i>-polylactide (PHPMA-<i>g</i>-PLA), and graft amphiphilic poly[<i>N</i>-(2-hydroxypropyl)] methacrylamide-<i>g</i>-polylactide (PHPMAA-<i>g</i>-PLA). The MF technology was utilized for the controlled self-assembly of these PLA-based BCs in a solution, resulting in a range of nanoparticle (NP) morphologies. The thermoresponsive PLA-<i>b</i>-PTEGMA diblock copolymer formed thermodynamically stable micelles (Ms) through kinetically controlled assemblies. Similarly, employing MF channels led to the self-assembly of PHPMA-<i>g</i>-PLA, yielding polymersomes (PSs) with adjustable sizes under the same solution conditions. Conversely, the PHPMAA-<i>g</i>-PLA copolymer generated worm-like particles (Ws). The analysis of resulting nano-objects involves techniques such as transmission electron microscopy, dynamic light scattering investigations (DLS), and small-angle X-ray scattering (SAXS). More specifically, the thermoresponsive behavior of PLA-<i>b</i>-PTEGMA and PHPMA-<i>g</i>-PLA nano-objects is validated through variable-temperature DLS, TEM, and SAXS methods. Furthermore, the study explored the specific interactions between the formed Ms, PSs, and/or Ws with proteins in human blood plasma, utilizing isothermal titration calorimetry.","PeriodicalId":72049,"journal":{"name":"ACS polymers Au","volume":"42 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141194547","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}
引用次数: 0
Ampholytic Peptides Consisting of an Alternating Lysine/Glutamic Acid Sequence for the Simultaneous Formation of Polyion Complex Vesicles 由赖氨酸/谷氨酸交替序列组成的两性多肽可同时形成多离子复合囊泡
IF 4.7
ACS polymers Au Pub Date : 2024-05-29 DOI: 10.1021/acspolymersau.4c0002910.1021/acspolymersau.4c00029
Kousuke Tsuchiya*, Seiya Fujita and Keiji Numata*, 
{"title":"Ampholytic Peptides Consisting of an Alternating Lysine/Glutamic Acid Sequence for the Simultaneous Formation of Polyion Complex Vesicles","authors":"Kousuke Tsuchiya*,&nbsp;Seiya Fujita and Keiji Numata*,&nbsp;","doi":"10.1021/acspolymersau.4c0002910.1021/acspolymersau.4c00029","DOIUrl":"https://doi.org/10.1021/acspolymersau.4c00029https://doi.org/10.1021/acspolymersau.4c00029","url":null,"abstract":"<p >Nanoarchitectures such as micelles and vesicles that self-assemble via electrostatic interactions between their charged polymeric components have been widely used as material delivery platforms. In this work, ampholytic peptides with a sequence of alternating lysine and glutamic acid residues were designed and synthesized via chemoenzymatic polymerization. This alternating sequence was achieved by trypsin-catalyzed polymerization of a dipeptide monomer. Due to the electrostatic interaction between the anionic and cationic residues, the prepared ampholytic peptides spontaneously formed nanosized assemblies with a size of 100–200 nm in water. Modification with tetra(ethylene glycol) (TEG) at the <i>N</i>-terminus of these ampholytic alternating peptides resulted in the formation of stable nanosized assemblies, while peptides consisting of random sequences of lysine and glutamic acid formed large aggregates with deteriorated stability even with TEG modification. Morphological observations using a field-emission scanning electron microscope and an atomic force microscope revealed that the obtained assemblies were spherical and hollow, indicating the spontaneous formation of vesicles from the TEG-modified ampholytic alternating peptides. These vesicles were able to encapsulate a model fluorescent protein within their hollow structures without structural collapse causing loss of fluorescence, demonstrating the potential of these nanocarriers for use in material delivery systems.</p>","PeriodicalId":72049,"journal":{"name":"ACS polymers Au","volume":"4 4","pages":"320–330 320–330"},"PeriodicalIF":4.7,"publicationDate":"2024-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acspolymersau.4c00029","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141977814","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Ampholytic Peptides Consisting of an Alternating Lysine/Glutamic Acid Sequence for the Simultaneous Formation of Polyion Complex Vesicles 由赖氨酸/谷氨酸交替序列组成的两性多肽可同时形成多离子复合囊泡
ACS polymers Au Pub Date : 2024-05-29 DOI: 10.1021/acspolymersau.4c00029
Kousuke Tsuchiya, Seiya Fujita, Keiji Numata
{"title":"Ampholytic Peptides Consisting of an Alternating Lysine/Glutamic Acid Sequence for the Simultaneous Formation of Polyion Complex Vesicles","authors":"Kousuke Tsuchiya, Seiya Fujita, Keiji Numata","doi":"10.1021/acspolymersau.4c00029","DOIUrl":"https://doi.org/10.1021/acspolymersau.4c00029","url":null,"abstract":"Nanoarchitectures such as micelles and vesicles that self-assemble via electrostatic interactions between their charged polymeric components have been widely used as material delivery platforms. In this work, ampholytic peptides with a sequence of alternating lysine and glutamic acid residues were designed and synthesized via chemoenzymatic polymerization. This alternating sequence was achieved by trypsin-catalyzed polymerization of a dipeptide monomer. Due to the electrostatic interaction between the anionic and cationic residues, the prepared ampholytic peptides spontaneously formed nanosized assemblies with a size of 100–200 nm in water. Modification with tetra(ethylene glycol) (TEG) at the <i>N</i>-terminus of these ampholytic alternating peptides resulted in the formation of stable nanosized assemblies, while peptides consisting of random sequences of lysine and glutamic acid formed large aggregates with deteriorated stability even with TEG modification. Morphological observations using a field-emission scanning electron microscope and an atomic force microscope revealed that the obtained assemblies were spherical and hollow, indicating the spontaneous formation of vesicles from the TEG-modified ampholytic alternating peptides. These vesicles were able to encapsulate a model fluorescent protein within their hollow structures without structural collapse causing loss of fluorescence, demonstrating the potential of these nanocarriers for use in material delivery systems.","PeriodicalId":72049,"journal":{"name":"ACS polymers Au","volume":"24 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141194700","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}
引用次数: 0
Exploring the Role of Hydroxy- and Phosphate-Terminated cis-1,4-Polyisoprene Chains in the Formation of Physical Junction Points in Natural Rubber: Insights from Molecular Dynamics Simulations 探索羟基和磷酸根化顺式-1,4-聚异戊二烯链在天然橡胶物理连接点形成中的作用:分子动力学模拟的启示
IF 4.7
ACS polymers Au Pub Date : 2024-05-15 DOI: 10.1021/acspolymersau.4c0001910.1021/acspolymersau.4c00019
Mayank Dixit*,  and , Takashi Taniguchi*, 
{"title":"Exploring the Role of Hydroxy- and Phosphate-Terminated cis-1,4-Polyisoprene Chains in the Formation of Physical Junction Points in Natural Rubber: Insights from Molecular Dynamics Simulations","authors":"Mayank Dixit*,&nbsp; and ,&nbsp;Takashi Taniguchi*,&nbsp;","doi":"10.1021/acspolymersau.4c0001910.1021/acspolymersau.4c00019","DOIUrl":"https://doi.org/10.1021/acspolymersau.4c00019https://doi.org/10.1021/acspolymersau.4c00019","url":null,"abstract":"<p >This study elucidates the pivotal role of terminal structures in <i>cis</i>-1,4-polyisoprene (PI) chains, contributing to the exceptional mechanical properties of Hevea natural rubber (NR). NR’s unique networking structure, crucial for crack resistance, elasticity, and strain-induced crystallization, involves two terminal groups, ω and α. The proposed ω terminal structure is dimethyl allyl-(<i>trans</i>-1,4-isoprene)<sub>2</sub>, and α terminals exist in various forms, including hydroxy, ester, and phosphate groups. Among others, we investigated three types of <i>cis</i>-1,4-PI with different terminal combinations: <sub>H</sub>PI<sub>H</sub> (pure PI with H terminal), <sub>ω</sub>PI<sub>α6</sub> (PI with ω and α6 terminals), and <sub>ω</sub>PI<sub>PO<sub>4</sub></sub> (PI with ω and PO<sub>4</sub> terminals) and revealed significant dynamics variations. Hydrogen bonds between α6 and α6 and PO<sub>4</sub> and PO<sub>4</sub> residues in <sub>ω</sub>PI<sub>α6</sub> and <sub>ω</sub>PI<sub>PO<sub>4</sub></sub> systems induce slower dynamics of hydroxy- and phosphate-terminated PI chains. Associations between α6 and α6 and PO<sub>4</sub> and PO<sub>4</sub> terminals are markedly stronger than ω and ω, and hydrogen terminals in <sub>H</sub>PI<sub>H</sub> and <sub><i>ω</i></sub>PI<sub>α6,PO<sub>4</sub></sub> systems. Phosphate terminals exhibit a stronger mutual association than hydroxy terminals. Potentials of mean force analysis and cluster-formation-fraction computations reveal stable clusters in <sub>ω</sub>PI<sub>α6</sub> and <sub>ω</sub>PI<sub>PO<sub>4</sub></sub>, supporting the formation of polar aggregates (physical junction points). Notably, phosphate terminal groups facilitate large and highly stable phosphate polar aggregates, crucial for the natural networking structure responsible for NR’s outstanding mechanical properties compared to synthetic PI rubber. This comprehensive investigation provides valuable insights into the role of terminal groups in <i>cis</i>-1,4-PI melt systems and their profound impact on the mechanical properties of NR.</p>","PeriodicalId":72049,"journal":{"name":"ACS polymers Au","volume":"4 4","pages":"273–288 273–288"},"PeriodicalIF":4.7,"publicationDate":"2024-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acspolymersau.4c00019","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141977812","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Pattern Formation in Evaporating Polymer Solutions─Interplay between Dewetting and Decomposition 蒸发聚合物溶液中的图案形成--渗湿与分解之间的相互作用
ACS polymers Au Pub Date : 2024-05-13 DOI: 10.1021/acspolymersau.4c00018
Pankaj Mahawar, M. Praveena, Shreyanil Bhuyan, Dipin S. Pillai, Sivasurender Chandran
{"title":"Pattern Formation in Evaporating Polymer Solutions─Interplay between Dewetting and Decomposition","authors":"Pankaj Mahawar, M. Praveena, Shreyanil Bhuyan, Dipin S. Pillai, Sivasurender Chandran","doi":"10.1021/acspolymersau.4c00018","DOIUrl":"https://doi.org/10.1021/acspolymersau.4c00018","url":null,"abstract":"Pattern formation during solution evaporation is common in several industrial settings and involves a complex interplay of multiple processes, including wetting/dewetting, diffusion, and rheological characteristics of the solution. Monitoring the emergence of patterns during evaporation under controlled conditions may allow deconvolution of different processes and, in turn, improve our understanding of this common yet complex phenomenon. Here, we probe the importance of initial conditions, defined by the solution concentration <i>c</i><sub>0</sub>, on the pattern formation in evaporating polymer solutions on the air–water interface. Intriguingly, the initial decrease in the lateral length scale (ξ), characterizing the patterns, takes an upturn at higher concentrations, revealing reentrant behavior. We employ a gradient dynamics model consisting of coupled evolution equations for the film height and the polymer fraction in the solution. Our simulations capture two different length scales revealing the reasons underlying the re-entrant behavior of ξ(<i>c</i><sub>0</sub>). While the long-range destabilizing interactions between suspension and water result in the dewetting of thin film solutions, the phase separation between the polymer and solvent occurs at shorter length scales. Our results demonstrate the importance of initial concentration on pattern formation and, thereby, on the resultant properties of thin polymer films.","PeriodicalId":72049,"journal":{"name":"ACS polymers Au","volume":"66 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140934637","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}
引用次数: 0
Pattern Formation in Evaporating Polymer Solutions─Interplay between Dewetting and Decomposition 蒸发聚合物溶液中的图案形成--渗湿与分解之间的相互作用
IF 4.7
ACS polymers Au Pub Date : 2024-05-13 DOI: 10.1021/acspolymersau.4c0001810.1021/acspolymersau.4c00018
Pankaj Mahawar, M. Praveena, Shreyanil Bhuyan, Dipin S. Pillai and Sivasurender Chandran*, 
{"title":"Pattern Formation in Evaporating Polymer Solutions─Interplay between Dewetting and Decomposition","authors":"Pankaj Mahawar,&nbsp;M. Praveena,&nbsp;Shreyanil Bhuyan,&nbsp;Dipin S. Pillai and Sivasurender Chandran*,&nbsp;","doi":"10.1021/acspolymersau.4c0001810.1021/acspolymersau.4c00018","DOIUrl":"https://doi.org/10.1021/acspolymersau.4c00018https://doi.org/10.1021/acspolymersau.4c00018","url":null,"abstract":"<p >Pattern formation during solution evaporation is common in several industrial settings and involves a complex interplay of multiple processes, including wetting/dewetting, diffusion, and rheological characteristics of the solution. Monitoring the emergence of patterns during evaporation under controlled conditions may allow deconvolution of different processes and, in turn, improve our understanding of this common yet complex phenomenon. Here, we probe the importance of initial conditions, defined by the solution concentration <i>c</i><sub>0</sub>, on the pattern formation in evaporating polymer solutions on the air–water interface. Intriguingly, the initial decrease in the lateral length scale (ξ), characterizing the patterns, takes an upturn at higher concentrations, revealing reentrant behavior. We employ a gradient dynamics model consisting of coupled evolution equations for the film height and the polymer fraction in the solution. Our simulations capture two different length scales revealing the reasons underlying the re-entrant behavior of ξ(<i>c</i><sub>0</sub>). While the long-range destabilizing interactions between suspension and water result in the dewetting of thin film solutions, the phase separation between the polymer and solvent occurs at shorter length scales. Our results demonstrate the importance of initial concentration on pattern formation and, thereby, on the resultant properties of thin polymer films.</p>","PeriodicalId":72049,"journal":{"name":"ACS polymers Au","volume":"4 4","pages":"302–310 302–310"},"PeriodicalIF":4.7,"publicationDate":"2024-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acspolymersau.4c00018","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141977811","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Real-Time Determination of Molecular Weight: Use of MaDDOSY (Mass Determination Diffusion Ordered Spectroscopy) to Monitor the Progress of Polymerization Reactions 实时测定分子量:使用 MaDDOSY(质量测定扩散有序光谱法)监测聚合反应的进程
ACS polymers Au Pub Date : 2024-05-09 DOI: 10.1021/acspolymersau.4c00020
Owen Tooley, William Pointer, Rowan Radmall, Mia Hall, Thomas Swift, James Town, Cansu Aydogan, Tanja Junkers, Paul Wilson, Daniel Lester, David Haddleton
{"title":"Real-Time Determination of Molecular Weight: Use of MaDDOSY (Mass Determination Diffusion Ordered Spectroscopy) to Monitor the Progress of Polymerization Reactions","authors":"Owen Tooley, William Pointer, Rowan Radmall, Mia Hall, Thomas Swift, James Town, Cansu Aydogan, Tanja Junkers, Paul Wilson, Daniel Lester, David Haddleton","doi":"10.1021/acspolymersau.4c00020","DOIUrl":"https://doi.org/10.1021/acspolymersau.4c00020","url":null,"abstract":"Knowledge of molecular weight is an integral factor in polymer synthesis, and while many synthetic strategies have been developed to help control this, determination of the final molecular weight is often only measured at the end of the reaction. Herein, we provide a technique for the online determination of polymer molecular weight using a universal, solvent-independent diffusion ordered spectroscopy (DOSY) calibration and evidence its use in a variety of polymerization reactions.","PeriodicalId":72049,"journal":{"name":"ACS polymers Au","volume":"36 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140934551","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}
引用次数: 0
Real-Time Determination of Molecular Weight: Use of MaDDOSY (Mass Determination Diffusion Ordered Spectroscopy) to Monitor the Progress of Polymerization Reactions 实时测定分子量:使用 MaDDOSY(质量测定扩散有序光谱法)监测聚合反应的进程
IF 4.7
ACS polymers Au Pub Date : 2024-05-09 DOI: 10.1021/acspolymersau.4c0002010.1021/acspolymersau.4c00020
Owen Tooley, William Pointer, Rowan Radmall, Mia Hall, Thomas Swift, James Town, Cansu Aydogan, Tanja Junkers, Paul Wilson, Daniel Lester* and David Haddleton*, 
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