Pub Date : 2023-05-22DOI: 10.1080/10601325.2023.2212704
Amjad Ali, Adnan Murad Bhayo, A. Naveed, Tariq Aziz, N. Ahmad, Waqar Ahamad Qureshi, Adnan Younis, Jamile Mohammadi Moradian, M. Hassan, Muhammad Minhaj Qadri, Zhiqiang Fan, Li Guo
Abstract To understand how the silyl-bridged metallocene catalysts rac-Me2Si(2-Me-4-Ph-Ind)2ZrCl2 behave against dienes under the same reaction condition because of its importance as a commercial polymerization catalyst and ethylene propylene diene monomers (EPDM). Adding diene depressed the catalytic activity, especially 5-ethylidene-2-norbornene (ENB) exerted the most substantial deactivation effect. Firstly, we examine the (ENB, vinyl norbornene (VNB) and 4-vinylcyclohexene (VCH)) non-conjugated and conjugated (isoprene (IP), butadiene (BD)) diene and address how polymerization catalysts behave against these dienes. For example, the catalytic activity was enhanced with IP and BD (3–3.3106 gm/mmolMt·h) compared to ENB, VNB and VCH. The VNB incorporation rate was prolonged (5.4 mol%), but with IP and BD, it was relatively moderate. E/P/IP and E/P/BD with higher incorporation of E produced a higher MW, which means that the chain transfer reaction with ethylene is slower than P. Secondly, we address how the dienes exocyclic and exocyclicπ bonds of non-conjugated and conjugated properties of IP and BD affect the kinetic measurements such as active centers [Zr]/[C*] fraction, EPDM chain propagation, termination, and isomerization. Finally, we compare [Zr]/[C*] and kpPE, kpP and kpDienes for different EPDM. After collecting these kinetic parameters, we can describe the mechanism’s intricacy and the existence of considerable catalyst dormancy with dienes under identical reaction conditions. Graphical Abstract
{"title":"Why only half of the added ansa-metallocene catalyst active in the E/P/diene polymerization: catalyst evaluation in terms of active center [Zr]/[C*] fraction and polymerization propagation rate constants","authors":"Amjad Ali, Adnan Murad Bhayo, A. Naveed, Tariq Aziz, N. Ahmad, Waqar Ahamad Qureshi, Adnan Younis, Jamile Mohammadi Moradian, M. Hassan, Muhammad Minhaj Qadri, Zhiqiang Fan, Li Guo","doi":"10.1080/10601325.2023.2212704","DOIUrl":"https://doi.org/10.1080/10601325.2023.2212704","url":null,"abstract":"Abstract To understand how the silyl-bridged metallocene catalysts rac-Me2Si(2-Me-4-Ph-Ind)2ZrCl2 behave against dienes under the same reaction condition because of its importance as a commercial polymerization catalyst and ethylene propylene diene monomers (EPDM). Adding diene depressed the catalytic activity, especially 5-ethylidene-2-norbornene (ENB) exerted the most substantial deactivation effect. Firstly, we examine the (ENB, vinyl norbornene (VNB) and 4-vinylcyclohexene (VCH)) non-conjugated and conjugated (isoprene (IP), butadiene (BD)) diene and address how polymerization catalysts behave against these dienes. For example, the catalytic activity was enhanced with IP and BD (3–3.3106 gm/mmolMt·h) compared to ENB, VNB and VCH. The VNB incorporation rate was prolonged (5.4 mol%), but with IP and BD, it was relatively moderate. E/P/IP and E/P/BD with higher incorporation of E produced a higher MW, which means that the chain transfer reaction with ethylene is slower than P. Secondly, we address how the dienes exocyclic and exocyclicπ bonds of non-conjugated and conjugated properties of IP and BD affect the kinetic measurements such as active centers [Zr]/[C*] fraction, EPDM chain propagation, termination, and isomerization. Finally, we compare [Zr]/[C*] and kpPE, kpP and kpDienes for different EPDM. After collecting these kinetic parameters, we can describe the mechanism’s intricacy and the existence of considerable catalyst dormancy with dienes under identical reaction conditions. Graphical Abstract","PeriodicalId":16228,"journal":{"name":"Journal of Macromolecular Science, Part A","volume":"79 1","pages":"417 - 426"},"PeriodicalIF":0.0,"publicationDate":"2023-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79239266","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}
Pub Date : 2023-05-22DOI: 10.1080/10601325.2023.2211613
Xian-Zhao Wang, Jinshui Yao
Abstract In this study, several polyphenylacetylenes (PPAs) derivatives containing amino acid pendant groups were synthesized using a rhodium system catalyst (Rh(nbd)BPh4). The synthesized derivatives of PPAs included single chiral PPA with a single chiral center in the pendant groups and double chiral PPA' with two chiral centers in the pendant groups. The PPA and PPA' showed strong circular dichroism (CD) signals in the main chain absorption region of the UV-vis spectrum, while the monomer showed no CD signals. Furthermore, the PPA and PPA' with different chiral pendant groups showed different Cotton effects in the CD spectra. The results showed that these polymers existed in helical conformation, and the chiral center of the pendant groups affected the polymerization and helical structure of PPAs. Graphical Abstract
{"title":"Effect of amino acid pendant groups on the helical configuration of polyphenylacetylene","authors":"Xian-Zhao Wang, Jinshui Yao","doi":"10.1080/10601325.2023.2211613","DOIUrl":"https://doi.org/10.1080/10601325.2023.2211613","url":null,"abstract":"Abstract In this study, several polyphenylacetylenes (PPAs) derivatives containing amino acid pendant groups were synthesized using a rhodium system catalyst (Rh(nbd)BPh4). The synthesized derivatives of PPAs included single chiral PPA with a single chiral center in the pendant groups and double chiral PPA' with two chiral centers in the pendant groups. The PPA and PPA' showed strong circular dichroism (CD) signals in the main chain absorption region of the UV-vis spectrum, while the monomer showed no CD signals. Furthermore, the PPA and PPA' with different chiral pendant groups showed different Cotton effects in the CD spectra. The results showed that these polymers existed in helical conformation, and the chiral center of the pendant groups affected the polymerization and helical structure of PPAs. Graphical Abstract","PeriodicalId":16228,"journal":{"name":"Journal of Macromolecular Science, Part A","volume":"51 1","pages":"409 - 416"},"PeriodicalIF":0.0,"publicationDate":"2023-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90322884","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}
Abstract Novel hydrophilic polymers consisting of fluorene modified by alkoxyl chain were designed and synthesized via radical polymerization from acrylic acid (PAAF) or acrylamide (PAMF) in the presence of azobisisobutyronitrile. All of these polymers were good water-soluble. The photophysical behaviors of the polymers and the selectivity and sensitivity to detection metal ions were studied by UV-visible and fluorescence spectroscopy technique, and some color changes were visible to the naked eye appeared. The PAMF fluorescent probe showed good selectivity and sensitivity to detection Fe3+ (2.4 × 10−7 mol/L) and PAAF exhibited good selectivity and sensitivity to detection Fe2+ (1.5 × 10−6 mol/L) and Cu2+ (5 × 10−7 mol/L) in water. Graphical Abstract
{"title":"A hydrophilic polymer based on alkoxyl chain modified fluorene: the novel fluorescence colorimetric sensor for Fe3+, Fe2+, and Cu2+ in aqueous media","authors":"C. Ma, Zihan Ma, Ziyuan He, Xianjian Wang, Longhao Zhao, Xuegang Chen","doi":"10.1080/10601325.2023.2210165","DOIUrl":"https://doi.org/10.1080/10601325.2023.2210165","url":null,"abstract":"Abstract Novel hydrophilic polymers consisting of fluorene modified by alkoxyl chain were designed and synthesized via radical polymerization from acrylic acid (PAAF) or acrylamide (PAMF) in the presence of azobisisobutyronitrile. All of these polymers were good water-soluble. The photophysical behaviors of the polymers and the selectivity and sensitivity to detection metal ions were studied by UV-visible and fluorescence spectroscopy technique, and some color changes were visible to the naked eye appeared. The PAMF fluorescent probe showed good selectivity and sensitivity to detection Fe3+ (2.4 × 10−7 mol/L) and PAAF exhibited good selectivity and sensitivity to detection Fe2+ (1.5 × 10−6 mol/L) and Cu2+ (5 × 10−7 mol/L) in water. Graphical Abstract","PeriodicalId":16228,"journal":{"name":"Journal of Macromolecular Science, Part A","volume":"9 1","pages":"397 - 408"},"PeriodicalIF":0.0,"publicationDate":"2023-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87280092","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}
Pub Date : 2023-05-11DOI: 10.1080/10601325.2023.2208607
D. Yigit, S. Hacioglu, M. Güllü, L. Toppare
Abstract Herein, three multifunctional 3',4'-bis(alkyloxy)-2,2':5',2"-terthiophene comprising monomers with different alkyl chains were electrochemically polymerized on an ITO electrode to obtain the polymers; poly(3',4'-dibutoxy-2,2':5',2"-terthiophene) (P1), poly(3',4'-bis(hexyloxy)-2,2':5',2"-terthiophene) (P2), and poly(3',4'-bis(octyloxy)-2,2':5',2"-terthiophene) (P3). Cyclic voltammetry and in situ spectroelectrochemical studies were performed for the polymers to investigate their oxidation potentials, HOMO/LUMO energy levels, band gaps (Egop), optical contrasts (T%), and switching times. All polymers had an optical band gap at around 1.8 and 1.9 eV and revealed different tones of red color in their neutral states and different tones of blue color in their oxidized states with similar electrochromic features. This means that the alteration of the alkyl chain lengths did not affect the band gap and the colors of the resulting polymers significantly. When P1, P2, and P3 were compared in terms of electrochromic contrast and switching studies, P1 had superior optical contrast and switching time values. P1 exhibited 51% optical contrast at 520 nm which is a rare and desired property for -conjugated conducting polymers in the visible region. P1, P2 and P3 conducting polymer films, which were also used for energy storage applications before, revealed promising electrochromic characters in this study, so these poly(3',4'-bis(alkyloxy)-2,2':5',2"-terthiophene) derivatives can be called as multifunctional next-generation materials. Graphical Abstract
{"title":"Electrochemical and optical properties of 3',4'-bis(alkyloxy)-2,2':5',2\"-terthiophene bearing multifunctional polymers: Effect of alkyl chain length on electrochromic properties","authors":"D. Yigit, S. Hacioglu, M. Güllü, L. Toppare","doi":"10.1080/10601325.2023.2208607","DOIUrl":"https://doi.org/10.1080/10601325.2023.2208607","url":null,"abstract":"Abstract Herein, three multifunctional 3',4'-bis(alkyloxy)-2,2':5',2\"-terthiophene comprising monomers with different alkyl chains were electrochemically polymerized on an ITO electrode to obtain the polymers; poly(3',4'-dibutoxy-2,2':5',2\"-terthiophene) (P1), poly(3',4'-bis(hexyloxy)-2,2':5',2\"-terthiophene) (P2), and poly(3',4'-bis(octyloxy)-2,2':5',2\"-terthiophene) (P3). Cyclic voltammetry and in situ spectroelectrochemical studies were performed for the polymers to investigate their oxidation potentials, HOMO/LUMO energy levels, band gaps (Egop), optical contrasts (T%), and switching times. All polymers had an optical band gap at around 1.8 and 1.9 eV and revealed different tones of red color in their neutral states and different tones of blue color in their oxidized states with similar electrochromic features. This means that the alteration of the alkyl chain lengths did not affect the band gap and the colors of the resulting polymers significantly. When P1, P2, and P3 were compared in terms of electrochromic contrast and switching studies, P1 had superior optical contrast and switching time values. P1 exhibited 51% optical contrast at 520 nm which is a rare and desired property for -conjugated conducting polymers in the visible region. P1, P2 and P3 conducting polymer films, which were also used for energy storage applications before, revealed promising electrochromic characters in this study, so these poly(3',4'-bis(alkyloxy)-2,2':5',2\"-terthiophene) derivatives can be called as multifunctional next-generation materials. Graphical Abstract","PeriodicalId":16228,"journal":{"name":"Journal of Macromolecular Science, Part A","volume":"21 1","pages":"384 - 396"},"PeriodicalIF":0.0,"publicationDate":"2023-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80843041","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}
Pub Date : 2023-05-11DOI: 10.1080/10601325.2023.2208604
Jingqing Jia, Rongchang Peng, Yanjing Gao, F. Sun
Abstract In this article, three polymerizable polysiloxane monomers with different chain lengths (MA-Sin, n = 3,6,9) have been synthesized, and then MA-Sin was mixed with disulfide monomer (SA) and different acrylate monomers in certain proportion to obtain a series of photopolymerizable systems. The effects of the contents of SA and MA-Sin, and the chain length of MA-Sin on the photopolymerization kinetics, volume shrinkage, water contact angle, thermal resistance, glass transition temperature (T g), tensile properties and degradability of the photocured films were explored in detail. The results show that the content and the chain length of MA-Sin have no significant effect on the final double bond conversion, which reaches about 94%. With the increase of SA content, the volume shrinkage of the photocured film descends and eventually drops to 3.23%. The addition of MA-Sin contributes to improve thermal stability and hydrophobicity. With the lengthening of the chain length of MA-Sin, the water contact angle, tensile strength, elongation at break and thermal resistance of the photocured film were enhanced, whereas T g is decreased. More importantly, the SA endows the photocured films with good degradability. Graphical Abstract The acrylate photopolymerization systems containing disulfide monomer (SA) and polysiloxane monomer (MA-Sin, n = 3,6,9) exhibit excellent photopolymerization property, low volume shrinkage (3.42%), outstanding degradation property, and improved thermostability and hydrophobicity.
摘要本文合成了三种不同链长的聚硅氧烷单体(MA-Sin, n = 3,6,9)，然后将MA-Sin与二硫单体(SA)和不同的丙烯酸酯单体按一定比例混合，得到一系列可光聚合的体系。考察了SA和MA-Sin的含量以及MA-Sin的链长对光固化膜的光聚合动力学、体积收缩率、水接触角、热阻、玻璃化转变温度(T g)、拉伸性能和降解性能的影响。结果表明，MA-Sin的含量和链长对最终的双键转化率没有显著影响，达到94%左右。随着SA含量的增加，光固化膜的体积收缩率逐渐下降，最终降至3.23%。MA-Sin的加入有助于提高热稳定性和疏水性。随着MA-Sin链长的延长，光固化膜的水接触角、抗拉强度、断裂伸长率和热阻均增强，而tg减小。更重要的是，SA使光固化膜具有良好的降解性。摘要含二硫单体(SA)和聚硅氧烷单体(MA-Sin, n = 3,6,9)的丙烯酸酯光聚合体系具有优异的光聚合性能、低体积收缩率(3.42%)、优异的降解性能、良好的热稳定性和疏水性。
{"title":"Preparation and property study of photocurable polysiloxane polyacrylate materials containing S—S bonds","authors":"Jingqing Jia, Rongchang Peng, Yanjing Gao, F. Sun","doi":"10.1080/10601325.2023.2208604","DOIUrl":"https://doi.org/10.1080/10601325.2023.2208604","url":null,"abstract":"Abstract In this article, three polymerizable polysiloxane monomers with different chain lengths (MA-Sin, n = 3,6,9) have been synthesized, and then MA-Sin was mixed with disulfide monomer (SA) and different acrylate monomers in certain proportion to obtain a series of photopolymerizable systems. The effects of the contents of SA and MA-Sin, and the chain length of MA-Sin on the photopolymerization kinetics, volume shrinkage, water contact angle, thermal resistance, glass transition temperature (T g), tensile properties and degradability of the photocured films were explored in detail. The results show that the content and the chain length of MA-Sin have no significant effect on the final double bond conversion, which reaches about 94%. With the increase of SA content, the volume shrinkage of the photocured film descends and eventually drops to 3.23%. The addition of MA-Sin contributes to improve thermal stability and hydrophobicity. With the lengthening of the chain length of MA-Sin, the water contact angle, tensile strength, elongation at break and thermal resistance of the photocured film were enhanced, whereas T g is decreased. More importantly, the SA endows the photocured films with good degradability. Graphical Abstract The acrylate photopolymerization systems containing disulfide monomer (SA) and polysiloxane monomer (MA-Sin, n = 3,6,9) exhibit excellent photopolymerization property, low volume shrinkage (3.42%), outstanding degradation property, and improved thermostability and hydrophobicity.","PeriodicalId":16228,"journal":{"name":"Journal of Macromolecular Science, Part A","volume":"31 1","pages":"375 - 383"},"PeriodicalIF":0.0,"publicationDate":"2023-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85372852","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}
Pub Date : 2023-05-04DOI: 10.1080/10601325.2023.2206857
R. K. Saroj, Ruchi Chawla, P. Dutta
Abstract Chitosan β-ketosulfone derivative was synthesized by chemical modification of chitosan with in situ generated β-ketosulfone using styrene, benzenesulfinic acid sodium salt in the presence of potassium persulphate and air in an aqueous medium. The chemical structure of the derivative was confirmed by various characterization techniques. The IR spectrum of chitosan β-ketosulfone showed new bands at 2366 cm−1 and 1367 cm−1 corresponding to the imine and sulfone functional group respectively. In the 1H NMR spectrum of the derivative, chitosan proton signals and new proton signals between δ 7.3 ppm and 7.7 ppm (aromatic region) were observed. Chitosan β-ketosulfone derivative showed better antimicrobial activity against A. niger fungi, gram-negative (E. coli) and gram-positive (B. subtilis) bacteria than native chitosan. The derivative also exhibited improved antioxidant activity over chitosan. The DPPH and ABTS radical scavenging activity of chitosan β-ketosulfone derivative at 1.6 mg/mL concentration were observed as 68.6 ± 1.5% and 90.2 ± 1.4% respectively at the same concentration. Moreover, the MTT cytotoxicity assay of the synthesized product on PBMCs (peripheral blood mononuclear cells) and HepG2 cells displayed encouraging results, which pave the pathway for the utilization of the derivative for further biomedical applications. Graphical Abstract Highlights Chitosan β-ketosulfone derivative synthesized via a novel route starting from simple starting materials better antimicrobial activity than native chitosan improved antioxidant activity over chitosan established on the basis of DPPH and ABTS radical scavenging assay potent anti-cancer activity
{"title":"One-pot synthesis of sulfone-based chitosan derivatives from alkene: characterization, antimicrobial, antioxidant and anti-cancer activity","authors":"R. K. Saroj, Ruchi Chawla, P. Dutta","doi":"10.1080/10601325.2023.2206857","DOIUrl":"https://doi.org/10.1080/10601325.2023.2206857","url":null,"abstract":"Abstract Chitosan β-ketosulfone derivative was synthesized by chemical modification of chitosan with in situ generated β-ketosulfone using styrene, benzenesulfinic acid sodium salt in the presence of potassium persulphate and air in an aqueous medium. The chemical structure of the derivative was confirmed by various characterization techniques. The IR spectrum of chitosan β-ketosulfone showed new bands at 2366 cm−1 and 1367 cm−1 corresponding to the imine and sulfone functional group respectively. In the 1H NMR spectrum of the derivative, chitosan proton signals and new proton signals between δ 7.3 ppm and 7.7 ppm (aromatic region) were observed. Chitosan β-ketosulfone derivative showed better antimicrobial activity against A. niger fungi, gram-negative (E. coli) and gram-positive (B. subtilis) bacteria than native chitosan. The derivative also exhibited improved antioxidant activity over chitosan. The DPPH and ABTS radical scavenging activity of chitosan β-ketosulfone derivative at 1.6 mg/mL concentration were observed as 68.6 ± 1.5% and 90.2 ± 1.4% respectively at the same concentration. Moreover, the MTT cytotoxicity assay of the synthesized product on PBMCs (peripheral blood mononuclear cells) and HepG2 cells displayed encouraging results, which pave the pathway for the utilization of the derivative for further biomedical applications. Graphical Abstract Highlights Chitosan β-ketosulfone derivative synthesized via a novel route starting from simple starting materials better antimicrobial activity than native chitosan improved antioxidant activity over chitosan established on the basis of DPPH and ABTS radical scavenging assay potent anti-cancer activity","PeriodicalId":16228,"journal":{"name":"Journal of Macromolecular Science, Part A","volume":"12 1","pages":"367 - 373"},"PeriodicalIF":0.0,"publicationDate":"2023-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88282847","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}
Pub Date : 2023-05-04DOI: 10.1080/10601325.2023.2210188
Zhong-Xing Jiang, Hui Zhao
Abstract Post-polymerization modification of pendant-activated ester groups on polymer backbones is a versatile tool to obtain multifunctional water-soluble polymers that cannot be synthesized by typical methods of polymerization. For the first time, short-chain PEG functionalized hydroxybenzoic acid esters (PHBE) were employed to synthesize novel monomers and polymers. The corresponding PHBE-bearing polymers were successfully synthesized for post-polymerization modification by free radical polymerization. More significantly, acrylic PEG functionalized hydroxybenzoic acid esters polymers showed traceless hydrolysis at room temperature for more than 10 days. Furthermore, the multifunctional PHBE-bearing polymers could be directly conjugated to water-soluble amines in water at room temperature. Therefore, this procedure provides an alternative route to well-defined, multifunctional, water-soluble polymers for a range of applications. Graphical Abstract
{"title":"Water-soluble and hydrolysis-resistant activated ester polymers: Synthesis, characterization, and application for preparing functional polymers","authors":"Zhong-Xing Jiang, Hui Zhao","doi":"10.1080/10601325.2023.2210188","DOIUrl":"https://doi.org/10.1080/10601325.2023.2210188","url":null,"abstract":"Abstract Post-polymerization modification of pendant-activated ester groups on polymer backbones is a versatile tool to obtain multifunctional water-soluble polymers that cannot be synthesized by typical methods of polymerization. For the first time, short-chain PEG functionalized hydroxybenzoic acid esters (PHBE) were employed to synthesize novel monomers and polymers. The corresponding PHBE-bearing polymers were successfully synthesized for post-polymerization modification by free radical polymerization. More significantly, acrylic PEG functionalized hydroxybenzoic acid esters polymers showed traceless hydrolysis at room temperature for more than 10 days. Furthermore, the multifunctional PHBE-bearing polymers could be directly conjugated to water-soluble amines in water at room temperature. Therefore, this procedure provides an alternative route to well-defined, multifunctional, water-soluble polymers for a range of applications. Graphical Abstract","PeriodicalId":16228,"journal":{"name":"Journal of Macromolecular Science, Part A","volume":"28 1","pages":"358 - 366"},"PeriodicalIF":0.0,"publicationDate":"2023-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76584202","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}
Pub Date : 2023-05-04DOI: 10.1080/10601325.2023.2210172
Ayesha Kausar
Abstract Porphyrins is a unique heterocyclic molecule with four modified pyrrole rings interconnected at α carbon atoms via methine groups. The potential of porphyrin has been enhanced by developing the linked nanostructures with nanocarbons (carbon nanotube, graphene and fullerene) through physical/covalent electron donor-acceptor interactions. The porphyrin linked nanocarbon nanostructures have been reinforced in the polymeric matrices such as thermoplastic and conjugated polymers using facile approaches. The polymer/porphyrin linked nanocarbon nanocomposite revealed several remarkable characteristics like high surface area, conductivity, optical, thermal, mechanical capacitance, sensing and photocatalytic features. The high-performance nanocomposite nanostructures have been employed in sensor, supercapacitor and solar cell applications. Graphical Abstract
{"title":"Porphyrin linked carbon nanostructures in polymeric nanocomposite—state-of-the-art and headways","authors":"Ayesha Kausar","doi":"10.1080/10601325.2023.2210172","DOIUrl":"https://doi.org/10.1080/10601325.2023.2210172","url":null,"abstract":"Abstract Porphyrins is a unique heterocyclic molecule with four modified pyrrole rings interconnected at α carbon atoms via methine groups. The potential of porphyrin has been enhanced by developing the linked nanostructures with nanocarbons (carbon nanotube, graphene and fullerene) through physical/covalent electron donor-acceptor interactions. The porphyrin linked nanocarbon nanostructures have been reinforced in the polymeric matrices such as thermoplastic and conjugated polymers using facile approaches. The polymer/porphyrin linked nanocarbon nanocomposite revealed several remarkable characteristics like high surface area, conductivity, optical, thermal, mechanical capacitance, sensing and photocatalytic features. The high-performance nanocomposite nanostructures have been employed in sensor, supercapacitor and solar cell applications. Graphical Abstract","PeriodicalId":16228,"journal":{"name":"Journal of Macromolecular Science, Part A","volume":"37 1","pages":"321 - 335"},"PeriodicalIF":0.0,"publicationDate":"2023-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75499920","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}
Pub Date : 2023-05-04DOI: 10.1080/10601325.2023.2206860
Twinkal Patel, J. Oh
Abstract Covalent adaptive polymeric networks covalently crosslinked with dynamic covalent bonds that undergo reversible exchange reaction hold good mechanical properties, dimensional stability, and solvent resistance as conventional thermosets and furthermore exhibit self-healability, reprocessability, sustainability and recyclability. Among many dynamic covalent bonds and interactions, hindered urea bond (HUB) that contains a bulky group on one of the two nitrogen atoms is promising for the development of dynamic covalent network materials. The developed HUB-bearing networks have been utilized for various applications requiring dynamic properties, such as energy harvesting and storage, sensor, flexible and wearable electronics, and surface coatings. This review summarizes the development of effective strategies to fabricate dynamic polymer networks based on HUBs with focus on the design and synthesis of effective HUBs with various bulkyamino groups as well as the synthesis of various polymeric materials. Graphical Abstract
{"title":"Dynamic covalent adaptive polymer network materials based on hindered urea bonds","authors":"Twinkal Patel, J. Oh","doi":"10.1080/10601325.2023.2206860","DOIUrl":"https://doi.org/10.1080/10601325.2023.2206860","url":null,"abstract":"Abstract Covalent adaptive polymeric networks covalently crosslinked with dynamic covalent bonds that undergo reversible exchange reaction hold good mechanical properties, dimensional stability, and solvent resistance as conventional thermosets and furthermore exhibit self-healability, reprocessability, sustainability and recyclability. Among many dynamic covalent bonds and interactions, hindered urea bond (HUB) that contains a bulky group on one of the two nitrogen atoms is promising for the development of dynamic covalent network materials. The developed HUB-bearing networks have been utilized for various applications requiring dynamic properties, such as energy harvesting and storage, sensor, flexible and wearable electronics, and surface coatings. This review summarizes the development of effective strategies to fabricate dynamic polymer networks based on HUBs with focus on the design and synthesis of effective HUBs with various bulkyamino groups as well as the synthesis of various polymeric materials. Graphical Abstract","PeriodicalId":16228,"journal":{"name":"Journal of Macromolecular Science, Part A","volume":"10 1","pages":"307 - 320"},"PeriodicalIF":0.0,"publicationDate":"2023-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80254961","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}
Pub Date : 2023-04-18DOI: 10.1080/10601325.2023.2200392
Shahrzad Pashapour Yeganeh, D. Zaarei, M. Ehsani, M. Kalaee, A. Oromiehie
Abstract For many years, Bisphenol A (BPA) based epoxy resins have been used as coating material for foodstuff cans because of their appropriate properties. Recently, with attention to the harmful health effects of BPA derivatives, limitation of the usage of epoxy resins has escalated. In this research, using Taguchi experimental design method, different nanocomposite coatings based on hybrid resinous materials containing different amounts of epoxy and polyester and silica nanoparticles were formulated. The migration properties of formulated coatings were investigated based on the standard methods. The results showed that the 45 wt.% replacement of epoxy by polyester resin in combination with 2 wt. % of nano silica, had not any inverse effect on needed mechanical, physical and chemical properties of optimized formulation and, at the same time, migration of BPA and toxic materials were in the acceptable ranges, based on the EN1186-EU 10:2011 standard. Graphical Abstract
{"title":"A novel strategy for foodstuff can coatings: Hybrid resinous materials beside silica nanoparticles","authors":"Shahrzad Pashapour Yeganeh, D. Zaarei, M. Ehsani, M. Kalaee, A. Oromiehie","doi":"10.1080/10601325.2023.2200392","DOIUrl":"https://doi.org/10.1080/10601325.2023.2200392","url":null,"abstract":"Abstract For many years, Bisphenol A (BPA) based epoxy resins have been used as coating material for foodstuff cans because of their appropriate properties. Recently, with attention to the harmful health effects of BPA derivatives, limitation of the usage of epoxy resins has escalated. In this research, using Taguchi experimental design method, different nanocomposite coatings based on hybrid resinous materials containing different amounts of epoxy and polyester and silica nanoparticles were formulated. The migration properties of formulated coatings were investigated based on the standard methods. The results showed that the 45 wt.% replacement of epoxy by polyester resin in combination with 2 wt. % of nano silica, had not any inverse effect on needed mechanical, physical and chemical properties of optimized formulation and, at the same time, migration of BPA and toxic materials were in the acceptable ranges, based on the EN1186-EU 10:2011 standard. Graphical Abstract","PeriodicalId":16228,"journal":{"name":"Journal of Macromolecular Science, Part A","volume":"1 1","pages":"346 - 357"},"PeriodicalIF":0.0,"publicationDate":"2023-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82763908","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}
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