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FTIR-ATR spectroscopic, thermal and microstructural studies on polypropylene-glass fiber composites. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.133181] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Becerra-Arciniegas RA, Narducci R, Ercolani G, Pasquini L, Knauth P, Di Vona ML. Aliphatic Anion Exchange Ionomers with Long Spacers and No Ether Links by Ziegler-Natta Polymerization: Properties and Alkaline Stability. Molecules 2022; 27:395. [PMID: 35056709 PMCID: PMC8780620 DOI: 10.3390/molecules27020395] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2021] [Revised: 12/27/2021] [Accepted: 01/06/2022] [Indexed: 12/05/2022] Open
Abstract
In this work we report the synthesis of poly(vinylbenzylchloride-co-hexene) copolymer grafted with N,N-dimethylhexylammonium groups to study the effect of an aliphatic backbone without ether linkage on the ionomer properties. The copolymerization was achieved by the Ziegler-Natta method, employing the complex ZrCl4 (THF)2 as a catalyst. A certain degree of crosslinking with N,N,N',N'-tetramethylethylenediamine (TEMED) was introduced with the aim of avoiding excessive swelling in water. The resulting anion exchange polymers were characterized by 1H-NMR, FTIR, TGA, and ion exchange capacity (IEC) measurements. The ionomers showed good alkaline stability; after 72 h of treatment in 2 M KOH at 80 °C the remaining IEC of 76% confirms that ionomers without ether bonds are less sensitive to a SN2 attack and suggests the possibility of their use as a binder in a fuel cell electrode formulation. The ionomers were also blended with polyvinyl alcohol (PVA) and crosslinked with glutaraldehyde. The water uptake of the blend membranes was around 110% at 25 °C. The ionic conductivity at 25 °C in the OH- form was 29.5 mS/cm.
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Affiliation(s)
- Raul Andres Becerra-Arciniegas
- Department of Industrial Engineering and International Laboratory “Ionomer Materials for Energy”, University of Rome Tor Vergata, Via del Politecnico 1, 00133 Roma, Italy;
- Aix-Marseille Univ, CNRS, MADIREL (UMR 7246) and International Laboratory “Ionomer Materials for Energy”, Campus St Jérôme, 13013 Marseille, France; (L.P.); (P.K.)
| | - Riccardo Narducci
- Department of Industrial Engineering and International Laboratory “Ionomer Materials for Energy”, University of Rome Tor Vergata, Via del Politecnico 1, 00133 Roma, Italy;
| | - Gianfranco Ercolani
- Department of Chemical Sciences and Technologies, University of Rome Tor Vergata, Via della Ricerca Scientifica, 00133 Roma, Italy;
| | - Luca Pasquini
- Aix-Marseille Univ, CNRS, MADIREL (UMR 7246) and International Laboratory “Ionomer Materials for Energy”, Campus St Jérôme, 13013 Marseille, France; (L.P.); (P.K.)
| | - Philippe Knauth
- Aix-Marseille Univ, CNRS, MADIREL (UMR 7246) and International Laboratory “Ionomer Materials for Energy”, Campus St Jérôme, 13013 Marseille, France; (L.P.); (P.K.)
| | - Maria Luisa Di Vona
- Department of Industrial Engineering and International Laboratory “Ionomer Materials for Energy”, University of Rome Tor Vergata, Via del Politecnico 1, 00133 Roma, Italy;
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Di Sacco F, Saidi S, Hermida-Merino D, Portale G. Revisiting the Mechanism of the Meso-to-α Transition of Isotactic Polypropylene and Ethylene–Propylene Random Copolymers. Macromolecules 2021. [DOI: 10.1021/acs.macromol.1c01904] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Federico Di Sacco
- Physical Chemistry of Polymeric and Nanostructured Materials, Zernike Institute for Advanced Materials, University of Groningen, Groningen 9747AG, The Netherlands
- Dutch Polymer Institute, P.O. Box 902, Eindhoven 5600 AX, The Netherlands
| | - Sarah Saidi
- Netherlands Organisation for Scientific Research (NWO), DUBBLE@ESRF BP CS40220, Grenoble 38043, France
- LMOPS, EA 4423, Université de Lorraine, CentraleSupelec Metz, 2 rue Edouard Belin, Metz 57070, France
| | - Daniel Hermida-Merino
- Netherlands Organisation for Scientific Research (NWO), DUBBLE@ESRF BP CS40220, Grenoble 38043, France
- LMOPS, EA 4423, Université de Lorraine, CentraleSupelec Metz, 2 rue Edouard Belin, Metz 57070, France
| | - Giuseppe Portale
- Physical Chemistry of Polymeric and Nanostructured Materials, Zernike Institute for Advanced Materials, University of Groningen, Groningen 9747AG, The Netherlands
- Dutch Polymer Institute, P.O. Box 902, Eindhoven 5600 AX, The Netherlands
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Qian C, Zhao Y, Wang D. Structural evolution of mesomorphic propylene–1‐butene random copolymer during heating process. POLYM INT 2021. [DOI: 10.1002/pi.6303] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Chengao Qian
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Engineering Plastics Institute of Chemistry, Chinese Academy of Sciences Beijing China
- University of Chinese Academy of Sciences Beijing China
| | - Ying Zhao
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Engineering Plastics Institute of Chemistry, Chinese Academy of Sciences Beijing China
| | - Dujin Wang
- Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Engineering Plastics Institute of Chemistry, Chinese Academy of Sciences Beijing China
- University of Chinese Academy of Sciences Beijing China
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Qian C, Zhao Y, Wang Z, Liu L, Wang D. Probing the difference of crystalline modifications and structural disorder of isotactic polypropylene via high-resolution FTIR spectroscopy. POLYMER 2021. [DOI: 10.1016/j.polymer.2021.123722] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Abstract
Nucleation plays a vital role in polymer crystallization, in which chain connectivity and thus the multiple length and time scales make crystal nucleation of polymer chains an interesting but complex subject. Though the topic has been intensively studied in the past decades, there are still many open questions to answer. The final properties of semicrystalline polymer materials are affected by all of the following: the starting melt, paths of nucleation, organization of lamellar crystals and evolution of the final crystalline structures. In this viewpoint, we attempt to discuss some of the remaining open questions and corresponding concepts: non-equilibrated polymers, self-induced nucleation, microscopic kinetics of different processes, metastability of polymer lamellar crystals, hierarchical order and cooperativity involved in nucleation, etc. Addressing these open questions through a combination of novel concepts, new theories and advanced approaches provides a deeper understanding of the multifaceted process of crystal nucleation of polymers.
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Zhao J, Xue Q, Chen X, You Z, Wang Z, Yuan J, Liu H, Hu L. Evaluation of SUVlean consistency in FDG and PSMA PET/MR with Dixon-, James-, and Janma-based lean body mass correction. EJNMMI Phys 2021; 8:17. [PMID: 33598849 PMCID: PMC7889776 DOI: 10.1186/s40658-021-00363-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2020] [Accepted: 02/04/2021] [Indexed: 01/22/2023] Open
Abstract
PURPOSE To systematically evaluate the consistency of various standardized uptake value (SUV) lean body mass (LBM) normalization methods in a clinical positron emission tomography/magnetic resonance imaging (PET/MR) setting. METHODS SUV of brain, liver, prostate, parotid, blood, and muscle were measured in 90 18F-FDG and 28 18F-PSMA PET/MR scans and corrected for LBM using the James, Janma (short for Janmahasatian), and Dixon approaches. The prospective study was performed from December 2018 to August 2020 at Shanghai East Hospital. Forty dual energy X-ray absorptiometry (DXA) measurements of non-fat mass were used as the reference standard. Agreement between different LBM methods was assessed by linear regression and Bland-Altman statistics. SUV's dependency on BMI was evaluated by means of linear regression and Pearson correlation. RESULTS Compared to DXA, the Dixon approach presented the least bias in LBM/weight% than James and Janma models (bias 0.4±7.3%, - 8.0±9.4%, and - 3.3±8.3% respectively). SUV normalized by body weight (SUVbw) was positively correlated with body mass index (BMI) for both FDG (e.g., liver: r = 0.45, p < 0.001) and PSMA scans (r = 0.20, p = 0.31), while SUV normalized by lean body mass (SUVlean) revealed a decreased dependency on BMI (r = 0.22, 0.08, 0.14, p = 0.04, 0.46, 0.18 for Dixon, James, and Janma models, respectively). The liver SUVbw of obese/overweight patients was significantly larger (p < 0.001) than that of normal patients, whereas the bias was mostly eliminated in SUVlean. One-way ANOVA showed significant difference (p < 0.001) between SUVlean in major organs measured using Dixon method vs James and Janma models. CONCLUSION Significant systematic variation was found using different approaches to calculate SUVlean. A consistent correction method should be applied for serial PET/MR scans. The Dixon method provides the most accurate measure of LBM, yielding the least bias of all approaches when compared to DXA.
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Affiliation(s)
- Jun Zhao
- Department of Nuclear Medicine, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China.
| | - Qiaoyi Xue
- Central Research Institute, United Imaging Healthcare Group, Shanghai, China
| | - Xing Chen
- Department of Nuclear Medicine, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China
| | - Zhiwen You
- Department of Nuclear Medicine, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China
| | - Zhe Wang
- Central Research Institute, United Imaging Healthcare Group, Shanghai, China
| | - Jianmin Yuan
- Central Research Institute, United Imaging Healthcare Group, Shanghai, China
| | - Hui Liu
- Central Research Institute, United Imaging Healthcare Group, Shanghai, China
| | - Lingzhi Hu
- Central Research Institute, United Imaging Healthcare Group, Shanghai, China
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Kaszonyiová M, Rybnikář F, Lapčík L, Vilčáková J. The effect of long-term natural aging on the iPB-1 structure and the II – I phase transformation rate. Polym Degrad Stab 2021. [DOI: 10.1016/j.polymdegradstab.2020.109437] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Janani H, Alamo RG. Effect of melt miscibility, polymorphism, and crystal morphology on tensile deformation of blends of isotactic polypropylene and propylene‐1‐hexene random copolymers. POLYMER CRYSTALLIZATION 2020. [DOI: 10.1002/pcr2.10111] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Hamed Janani
- Chemical Engineering Department Ferdowsi University of Mashhad Mashhad Iran
| | - Rufina G. Alamo
- Department of Chemical and Biomedical Engineering FAMU‐FSU College of Engineering Tallahassee Florida USA
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Iyer K, Margossian M, Muthukumar M. Interlude of metastability in the melting of polymer crystals. J Chem Phys 2019; 151:124903. [DOI: 10.1063/1.5114645] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Affiliation(s)
- Kiran Iyer
- Department of Chemical Engineering, University of Massachusetts, Amherst, Massachusetts 01003, USA
| | - Marzbed Margossian
- Department of Chemistry, University of Massachusetts, Amherst, Massachusetts 01003, USA
| | - Murugappan Muthukumar
- Department of Polymer Science and Engineering, University of Massachusetts, Amherst, Massachusetts 01003, USA
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Wamuo O, Wu Y, Hsu SL, Paul CW, Eodice A, Huang KY, Chen MH, Chang YH, Lin JL. Effects of chain configuration on the crystallization behavior of polypropylene based copolymers. POLYMER 2017. [DOI: 10.1016/j.polymer.2017.01.031] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Tomazett VK, Santos WG, Lima-Neto BS. Infrared spectroscopy as an effective tool in ring-opening metathesis polymerization: monitoring the polymerization kinetics of norbornene with amine-based Ru catalysts in real time. REACTION KINETICS MECHANISMS AND CATALYSIS 2017. [DOI: 10.1007/s11144-017-1147-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Li X, Ding J, Liu Y, Tian X. A new model for mesomorphic-monoclinic phase transition of isotactic polypropylene. POLYMER 2017. [DOI: 10.1016/j.polymer.2016.11.072] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Jiang Q, Zhao Y, Zhang C, Yang J, Xu Y, Wang D. In-situ investigation on the structural evolution of mesomorphic isotactic polypropylene in a continuous heating process. POLYMER 2016. [DOI: 10.1016/j.polymer.2016.10.004] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Hu W, Mathot VBF, Alamo RG, Gao H, Chen X. Crystallization of Statistical Copolymers. POLYMER CRYSTALLIZATION I 2016. [DOI: 10.1007/12_2016_349] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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Janani H, Alamo RG. Enhanced rate of formation of trigonal phase in blends of homogeneous isotactic propylene-1-hexene copolymers. POLYMER 2015. [DOI: 10.1016/j.polymer.2015.03.042] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Arranz-Andrés J, de la Orden M, Martínez Urreaga J, Gómez-Elvira J, Pérez E, Cerrada M. Fourier Transform Infrared Spectroscopy study of polymorphism in propylene-co-1-pentene copolymers: Trigonal form identification. Eur Polym J 2015. [DOI: 10.1016/j.eurpolymj.2014.12.016] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Mousavi SO, Jahani Y, Arabi H. Effect of the matrix modification technique (MMT) on the composition, microstructure, morphology, interfacial interaction and mechanical properties of polypropylene reactor alloys. RSC Adv 2015. [DOI: 10.1039/c5ra19020g] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
In this paper, a new approach was applied to improve phase compatibility of isotactic polypropylene (iPP) reactor alloys through a matrix modification technique (MMT).
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Affiliation(s)
| | - Yousef Jahani
- Faculty of Polymer Processing
- Iran Polymer and Petrochemical Institute
- Tehran
- Iran
| | - Hassan Arabi
- Faculty of Engineering
- Iran Polymer and Petrochemical Institute
- Tehran
- Iran
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Unusual crystallization behavior of isotactic polypropylene and propene/1-alkene copolymers at large undercoolings. POLYMER 2014. [DOI: 10.1016/j.polymer.2014.05.053] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Ren K, Cheng Y, He C, Xiao C, Li G, Chen X. The effect of alkyl side groups on the secondary structure and crystallization of poly(ethylene glycol)-block-polypeptide copolymers. POLYMER 2013. [DOI: 10.1016/j.polymer.2013.02.038] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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Ruiz-Orta C, Alamo RG. Morphological and kinetic partitioning of comonomer in random propylene 1-butene copolymers. POLYMER 2012. [DOI: 10.1016/j.polymer.2011.12.032] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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