ACS polymers Au最新文献

{"title":"","authors":"Daniil R. Nosov, Elena I. Lozinskaya, Dmitrii Y. Antonov, Denis O. Ponkratov, Andrey A. Tyutyunov, Malak Alaa Eddine, Cédric Plesse, Daniel F. Schmidt* and Alexander S. Shaplov*, ","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":72049,"journal":{"name":"ACS polymers Au","volume":"4 6","pages":"XXX-XXX XXX-XXX"},"PeriodicalIF":4.7,"publicationDate":"2024-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/pdf/10.1021/acspolymersau.4c00051","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144432848","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}

{"title":"","authors":"Anindita Das*,  and , Tarak K. Patra*, ","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":72049,"journal":{"name":"ACS polymers Au","volume":"4 6","pages":"XXX-XXX XXX-XXX"},"PeriodicalIF":4.7,"publicationDate":"2024-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/pdf/10.1021/acspolymersau.4c00083","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144432850","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}

{"title":"","authors":"Vojtěch Jašek*, Jan Fučík, Otakar Bartoš, Silvestr Figalla and Radek Přikryl, ","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":72049,"journal":{"name":"ACS polymers Au","volume":"4 6","pages":"XXX-XXX XXX-XXX"},"PeriodicalIF":4.7,"publicationDate":"2024-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/pdf/10.1021/acspolymersau.4c00068","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144432851","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}

{"title":"","authors":"","doi":"","DOIUrl":"","url":null,"abstract":"","PeriodicalId":72049,"journal":{"name":"ACS polymers Au","volume":"4 6","pages":"XXX-XXX XXX-XXX"},"PeriodicalIF":4.7,"publicationDate":"2024-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/pdf/10.1021/lgv004i006_1876155","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144345655","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}

{"title":"Tuning the Morphology of Immiscible Polymer Blend-Based Hybrid Nanocomposite for Improving Microwave Absorption Response","authors":"Erick Gabriel Ribeiro dos Anjos*,&nbsp;Tayra Rodrigues Brazil,&nbsp;Mirabel Cerqueira Rezende,&nbsp;Juliano Marini,&nbsp;Uttandaraman Sundararaj,&nbsp;Luiz Antonio Pessan and Fabio Roberto Passador*,&nbsp;","doi":"10.1021/acspolymersau.4c0008710.1021/acspolymersau.4c00087","DOIUrl":"https://doi.org/10.1021/acspolymersau.4c00087https://doi.org/10.1021/acspolymersau.4c00087","url":null,"abstract":"<p >Polymer-blend-based nanocomposites incorporating carbon nanomaterials hold significant potential for microwave absorption materials (MAM) applications. This study investigates the microwave absorption response of hybrid nanocomposites composed of multiwalled carbon nanotubes (MWCNT) and nanographite, prepared using industrial-like melt-mixing masterbatch strategies in a polycarbonate/acrylonitrile-butadiene-styrene copolymer (PC/ABS) blend matrix with varying blend ratios (100/0, 80/20, 60/40, 50/50, 40/60, 20/80, and 0/100) and a constant filler content (2 wt % MWCNT and 2 wt % nanographite). Furthermore, the PC/ABS (40/60) blend-based nanocomposite was prepared with the addition of a compatibilizer, 5 wt % of maleic anhydride grafted ABS (ABS-<i>g</i>-MAH), to verify possible changes in morphology. Morphology, rheology, mechanical, electrical, and electromagnetic properties were correlated. From a morphological perspective, a preferential distribution of MWCNTs within the PC phase was observed, with the different blend ratios leading to a transition from a dispersed matrix morphology in 80/20 and 20/80 (PC/ABS) to cocontinuous morphologies in the intermediate blends (60/40, 50/50, and 40/60). The addition of ABS-<i>g</i>-MAH as a compatibilizer resulted in significant morphological refinement. Electromagnetic properties, evaluated using both X-band rectangular waveguide and broadband coaxial airline techniques, as well as electrical conductivity, were found to be strongly influenced by the varying morphologies. The nanocomposite PC/ABS/ABS-<i>g</i>-MAH with a thickness of 3.0 mm presented a Reflection Loss (RL) of −29.4 dB at 9.44 GHz, with a bandwidth of 3 GHz. Across the broadband spectrum, RL values below −10 dB were observed, including at lower frequencies around 3.70 GHz. These findings suggest that morphological tuning of the polymer matrix offers a promising pathway for optimizing microwave absorption in hybrid nanocomposites.</p>","PeriodicalId":72049,"journal":{"name":"ACS polymers Au","volume":"5 1","pages":"10–25 10–25"},"PeriodicalIF":4.7,"publicationDate":"2024-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acspolymersau.4c00087","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143386196","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}

{"title":"Tuning the Morphology of Immiscible Polymer Blend-Based Hybrid Nanocomposite for Improving Microwave Absorption Response.","authors":"Erick Gabriel Ribeiro Dos Anjos, Tayra Rodrigues Brazil, Mirabel Cerqueira Rezende, Juliano Marini, Uttandaraman Sundararaj, Luiz Antonio Pessan, Fabio Roberto Passador","doi":"10.1021/acspolymersau.4c00087","DOIUrl":"10.1021/acspolymersau.4c00087","url":null,"abstract":"<p><p>Polymer-blend-based nanocomposites incorporating carbon nanomaterials hold significant potential for microwave absorption materials (MAM) applications. This study investigates the microwave absorption response of hybrid nanocomposites composed of multiwalled carbon nanotubes (MWCNT) and nanographite, prepared using industrial-like melt-mixing masterbatch strategies in a polycarbonate/acrylonitrile-butadiene-styrene copolymer (PC/ABS) blend matrix with varying blend ratios (100/0, 80/20, 60/40, 50/50, 40/60, 20/80, and 0/100) and a constant filler content (2 wt % MWCNT and 2 wt % nanographite). Furthermore, the PC/ABS (40/60) blend-based nanocomposite was prepared with the addition of a compatibilizer, 5 wt % of maleic anhydride grafted ABS (ABS-<i>g</i>-MAH), to verify possible changes in morphology. Morphology, rheology, mechanical, electrical, and electromagnetic properties were correlated. From a morphological perspective, a preferential distribution of MWCNTs within the PC phase was observed, with the different blend ratios leading to a transition from a dispersed matrix morphology in 80/20 and 20/80 (PC/ABS) to cocontinuous morphologies in the intermediate blends (60/40, 50/50, and 40/60). The addition of ABS-<i>g</i>-MAH as a compatibilizer resulted in significant morphological refinement. Electromagnetic properties, evaluated using both X-band rectangular waveguide and broadband coaxial airline techniques, as well as electrical conductivity, were found to be strongly influenced by the varying morphologies. The nanocomposite PC/ABS/ABS-<i>g</i>-MAH with a thickness of 3.0 mm presented a Reflection Loss (RL) of -29.4 dB at 9.44 GHz, with a bandwidth of 3 GHz. Across the broadband spectrum, RL values below -10 dB were observed, including at lower frequencies around 3.70 GHz. These findings suggest that morphological tuning of the polymer matrix offers a promising pathway for optimizing microwave absorption in hybrid nanocomposites.</p>","PeriodicalId":72049,"journal":{"name":"ACS polymers Au","volume":"5 1","pages":"10-25"},"PeriodicalIF":4.7,"publicationDate":"2024-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11826488/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143434437","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}

{"title":"Exploiting Online Spatially Resolved Dynamic Light Scattering and Flow-NMR for Automated Size Targeting of PISA-Synthesized Block Copolymer Nanoparticles.","authors":"Peter M Pittaway, Kudakwashe E Chingono, Stephen T Knox, Elaine Martin, Richard A Bourne, Olivier J Cayre, Nikil Kapur, Jonathan Booth, Robin Capomaccio, Nicholas Pedge, Nicholas J Warren","doi":"10.1021/acspolymersau.4c00074","DOIUrl":"10.1021/acspolymersau.4c00074","url":null,"abstract":"<p><p>Programmable synthesis of polymer nanoparticles prepared by polymerization-induced self-assembly (PISA) mediated by reversible addition-fragmentation chain-transfer (RAFT) dispersion polymerization with specified diameter is achieved in an automated flow-reactor platform. Real-time particle size and monomer conversion is obtained via inline spatially resolved dynamic light scattering (SRDLS) and benchtop nuclear magnetic resonance (NMR) instrumentation. An initial training experiment generated a relationship between copolymer block length and particle size for the synthesis of poly(<i>N</i>,<i>N</i>-dimethylacrylamide)-<i>b</i>-poly(diacetone acrylamide) (PDMAm-<i>b</i>-PDAAm) nanoparticles. The training data was used to target the product compositions required for synthesis of nanoparticles with defined diameters of 50, 60, 70, and 80 nm, while inline NMR spectroscopy enabled rapid acquisition of kinetic data to support their scale-up. NMR and SRDLS were used during the continuous manufacture of the targeted products to monitor product consistency while an automated sampling system collected practically useful quantities of the targeted products, thus outlining the potential of the platform as a tool for discovery, development, and manufacture of polymeric nanoparticles.</p>","PeriodicalId":72049,"journal":{"name":"ACS polymers Au","volume":"5 1","pages":"1-9"},"PeriodicalIF":4.7,"publicationDate":"2024-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11826489/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143434336","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}

{"title":"Reactivity Ratios of Biobased Dialkyl Itaconate Radical Polymerizations Derived from In-Line NMR Spectroscopy and Size-Exclusion Chromatography","authors":"Marco Drache,&nbsp;Brunette Audree Tameno Kouanwo,&nbsp;Jan Christoph Namyslo,&nbsp;Sacha Pérocheau Arnaud,&nbsp;Tobias Robert and Sabine Beuermann*,&nbsp;","doi":"10.1021/acspolymersau.4c0007110.1021/acspolymersau.4c00071","DOIUrl":"https://doi.org/10.1021/acspolymersau.4c00071https://doi.org/10.1021/acspolymersau.4c00071","url":null,"abstract":"<p >Itaconates available from renewable resources constitute a group of monomers that are used in several types of polymerizations. Their use in free-radical polymerizations (FRPs) is still limited due to the low propagation rate coefficients resulting in low polymerization rates and the occurrence of depropagation which is responsible for limited monomer conversion. Since FRP is considered very robust with few requirements concerning monomer purity, it is still interesting to investigate how itaconate FRP may become feasible. For this reason, copolymerizations of itaconates with other monomers well-suited for FRP are considered. In particular, copolymerization with acrylates appears to be interesting because the propagation rate of these monomers is high and depropagation is not operative at common polymerization temperatures. Copolymerizations of dibutyl and dicyclohexyl itaconate with butyl acrylate were performed to determine the copolymerization reactivity ratios required for tailoring copolymer composition. To limit the number of experiments, copolymerizations were carried out until high conversion and consumption of the individual monomers was obtained from ¹H NMR spectroscopy and quantitative size-exclusion chromatography.</p>","PeriodicalId":72049,"journal":{"name":"ACS polymers Au","volume":"4 6","pages":"540–549 540–549"},"PeriodicalIF":4.7,"publicationDate":"2024-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acspolymersau.4c00071","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142851092","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}

{"title":"Reactivity Ratios of Biobased Dialkyl Itaconate Radical Polymerizations Derived from In-Line NMR Spectroscopy and Size-Exclusion Chromatography.","authors":"Marco Drache, Brunette Audree Tameno Kouanwo, Jan Christoph Namyslo, Sacha Pérocheau Arnaud, Tobias Robert, Sabine Beuermann","doi":"10.1021/acspolymersau.4c00071","DOIUrl":"10.1021/acspolymersau.4c00071","url":null,"abstract":"<p><p>Itaconates available from renewable resources constitute a group of monomers that are used in several types of polymerizations. Their use in free-radical polymerizations (FRPs) is still limited due to the low propagation rate coefficients resulting in low polymerization rates and the occurrence of depropagation which is responsible for limited monomer conversion. Since FRP is considered very robust with few requirements concerning monomer purity, it is still interesting to investigate how itaconate FRP may become feasible. For this reason, copolymerizations of itaconates with other monomers well-suited for FRP are considered. In particular, copolymerization with acrylates appears to be interesting because the propagation rate of these monomers is high and depropagation is not operative at common polymerization temperatures. Copolymerizations of dibutyl and dicyclohexyl itaconate with butyl acrylate were performed to determine the copolymerization reactivity ratios required for tailoring copolymer composition. To limit the number of experiments, copolymerizations were carried out until high conversion and consumption of the individual monomers was obtained from ¹H NMR spectroscopy and quantitative size-exclusion chromatography.</p>","PeriodicalId":72049,"journal":{"name":"ACS polymers Au","volume":"4 6","pages":"540-549"},"PeriodicalIF":4.7,"publicationDate":"2024-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11638788/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142831115","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}

{"title":"Exploiting Online Spatially Resolved Dynamic Light Scattering and Flow-NMR for Automated Size Targeting of PISA-Synthesized Block Copolymer Nanoparticles","authors":"Peter M. Pittaway,&nbsp;Kudakwashe E. Chingono,&nbsp;Stephen T. Knox,&nbsp;Elaine Martin,&nbsp;Richard A. Bourne,&nbsp;Olivier J. Cayre,&nbsp;Nikil Kapur,&nbsp;Jonathan Booth,&nbsp;Robin Capomaccio,&nbsp;Nicholas Pedge and Nicholas J. Warren*,&nbsp;","doi":"10.1021/acspolymersau.4c0007410.1021/acspolymersau.4c00074","DOIUrl":"https://doi.org/10.1021/acspolymersau.4c00074https://doi.org/10.1021/acspolymersau.4c00074","url":null,"abstract":"<p >Programmable synthesis of polymer nanoparticles prepared by polymerization-induced self-assembly (PISA) mediated by reversible addition–fragmentation chain-transfer (RAFT) dispersion polymerization with specified diameter is achieved in an automated flow-reactor platform. Real-time particle size and monomer conversion is obtained via inline spatially resolved dynamic light scattering (SRDLS) and benchtop nuclear magnetic resonance (NMR) instrumentation. An initial training experiment generated a relationship between copolymer block length and particle size for the synthesis of poly(<i>N</i>,<i>N</i>-dimethylacrylamide)-<i>b</i>-poly(diacetone acrylamide) (PDMAm-<i>b</i>-PDAAm) nanoparticles. The training data was used to target the product compositions required for synthesis of nanoparticles with defined diameters of 50, 60, 70, and 80 nm, while inline NMR spectroscopy enabled rapid acquisition of kinetic data to support their scale-up. NMR and SRDLS were used during the continuous manufacture of the targeted products to monitor product consistency while an automated sampling system collected practically useful quantities of the targeted products, thus outlining the potential of the platform as a tool for discovery, development, and manufacture of polymeric nanoparticles.</p>","PeriodicalId":72049,"journal":{"name":"ACS polymers Au","volume":"5 1","pages":"1–9 1–9"},"PeriodicalIF":4.7,"publicationDate":"2024-11-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acspolymersau.4c00074","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143386195","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}