1
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Hallavant K, Mejres M, Schawe JEK, Esposito A, Saiter-Fourcin A. Influence of Chemical Composition and Structure on the Cooperative Fluctuation in Supercooled Glass-Forming Liquids. J Phys Chem Lett 2024; 15:4508-4514. [PMID: 38634820 DOI: 10.1021/acs.jpclett.4c00632] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/19/2024]
Abstract
The kinetics of the glass transition and the characteristic size of the fluctuating spatio-temporal domains in supercooled glass-forming liquids, i.e., the Cooperatively Rearranging Regions (CRR), were measured upon cooling over a broad range of cooling rates using Differential Scanning Calorimetry (DSC) and chip-based Fast Scanning Calorimetry (FSC). The investigations were conducted on a selection of fragile glass formers (fragility indices between 80 and 140), with a large variance in the atomic or molecular structure but comparable thermal glass transition temperatures Tg, with the aim of evaluating the influence of chemical composition and structure on the CRR size and the associated temperature fluctuation. The selected materials are two polymers (poly(vinyl acetate) (PVAc), poly(lactic acid) (PLA)) as well as the simplest chalcogenide glass-former (selenium). It turned out that the CRR size plotted against the reduced temperature T/Tg follows the same trend, irrespective of the considered glass-former.
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Affiliation(s)
- Kylian Hallavant
- Univ Rouen Normandie, INSA Rouen Normandie, CNRS, Groupe de Physique des Matériaux UMR 6634, F-76000 Rouen, France
| | - Marouane Mejres
- Univ Rouen Normandie, INSA Rouen Normandie, CNRS, Groupe de Physique des Matériaux UMR 6634, F-76000 Rouen, France
| | - Jürgen E K Schawe
- Mettler-Toledo GmbH, Analytical, 8606 Nänikon, Switzerland
- Laboratory of Metal Physics and Technology, Department of Materials, ETH Zurich, 8093 Zurich, Switzerland
| | - Antonella Esposito
- Univ Rouen Normandie, INSA Rouen Normandie, CNRS, Groupe de Physique des Matériaux UMR 6634, F-76000 Rouen, France
| | - Allisson Saiter-Fourcin
- Univ Rouen Normandie, INSA Rouen Normandie, CNRS, Groupe de Physique des Matériaux UMR 6634, F-76000 Rouen, France
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2
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Luo J, Wang X, Tong B, Li Z, Rocchi LA, Di Lisio V, Cangialosi D, Zuo B. Length Scale of Molecular Motions Governing Glass Equilibration in Hyperquenched and Slow-Cooled Polystyrene. J Phys Chem Lett 2024; 15:357-363. [PMID: 38175163 DOI: 10.1021/acs.jpclett.3c03263] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2024]
Abstract
Polymer glasses attain thermodynamic equilibrium owing to structural relaxation at various length scales. Herein, calorimetry experiments were conducted to trace the macroscopic relaxation of slow-cooled (SC) and hyperquenched (HQ) polystyrene (PS) glasses and based on detailed comparisons with molecular dynamics probed by dye reorientation, we discussed the possible molecular process governing the equilibration of PS glasses near the glass transition temperatures (Tg). Both SC and HQ glasses equilibrate owing to the cooperative segment motion above a characteristic temperature (Tc) slightly lower than the Tg. In contrast, below the Tc, the localized backbone motion with an apparent activation energy of 290 ± 20 kJ/mol, involving approximately six repeating units, assists equilibrium recovery of PS glasses on the experimentally accessible time scales. The results possibly indicate the presence of an alternative mechanism other than the α-cooperative process controlling physical aging of materials in their deep glassy states.
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Affiliation(s)
- Jintian Luo
- School of Chemistry and Chemical Engineering, Key Laboratory of Surface & Interface Science of Polymer Materials of Zhejiang Province, Zhejiang Sci-Tech University, Hangzhou 310018, China
| | - Xiang Wang
- School of Chemistry and Chemical Engineering, Key Laboratory of Surface & Interface Science of Polymer Materials of Zhejiang Province, Zhejiang Sci-Tech University, Hangzhou 310018, China
| | - Ben Tong
- School of Chemistry and Chemical Engineering, Key Laboratory of Surface & Interface Science of Polymer Materials of Zhejiang Province, Zhejiang Sci-Tech University, Hangzhou 310018, China
| | - Zhiqiang Li
- School of Chemistry and Chemical Engineering, Key Laboratory of Surface & Interface Science of Polymer Materials of Zhejiang Province, Zhejiang Sci-Tech University, Hangzhou 310018, China
| | - Lorenzo Augusto Rocchi
- Department of Chemistry, University of Rome "La Sapienza", P.le A. Moro 5, 00185 Rome, Italy
| | - Valerio Di Lisio
- Donostia International Physics Center, Paseo Manuel de Lardizabal 4, 20018 San Sebastian, Spain
| | - Daniele Cangialosi
- Donostia International Physics Center, Paseo Manuel de Lardizabal 4, 20018 San Sebastian, Spain
- Centro de Física de Materiales, Paseo Manuel de Lardizabal 5, 20018 San Sebastian, Spain
| | - Biao Zuo
- School of Chemistry and Chemical Engineering, Key Laboratory of Surface & Interface Science of Polymer Materials of Zhejiang Province, Zhejiang Sci-Tech University, Hangzhou 310018, China
- Zhejiang Provincial Innovation Center of Advanced Textile Technology, Shaoxing 312000, China
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3
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Shafqat N, Alegría A, Arbe A, Malicki N, Dronet S, Porcar L, Colmenero J. Disentangling the Calorimetric Glass-Transition Trace in Polymer/Oligomer Mixtures from the Modeling of Dielectric Relaxation and the Input of Small-Angle Neutron Scattering. Macromolecules 2022; 55:7614-7625. [PMID: 36118597 PMCID: PMC9477097 DOI: 10.1021/acs.macromol.2c00609] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2022] [Revised: 07/05/2022] [Indexed: 11/28/2022]
Abstract
![]()
We have disentangled the contributions to the glass transition
as observed by differential scanning calorimetry (DSC) on simplified
systems of industrial interest consisting of blends of styrene–butadiene
rubber (SBR) and polystyrene (PS) oligomer. To do this, we have started
from a model previously proposed to describe the effects of blending
on the equilibrium dynamics of the α-relaxation as monitored
by broadband dielectric spectroscopy (BDS). This model is based on
the combination of self-concentration and thermally driven concentration
fluctuations (TCFs). Considering the direct insight of small-angle
neutron scattering on TCFs, blending effects on the α-relaxation
can be fully accounted for by using only three free parameters: the
self-concentration of the components φselfSBR and φselfPS) and the relevant length scale of segmental
relaxation, 2Rc. Their values were determined
from the analysis of the BDS results on these samples, being that
obtained for 2Rc ≈ 25Å in
the range usually reported for this magnitude in glass-forming systems.
Using a similar approach, the distinct contributions to the DSC experiments
were evaluated by imposing the dynamical information deduced from
BDS and connecting the component segmental dynamics in the blend above
the glass-transition temperature Tg (at
equilibrium) and the way the equilibrium is lost when cooling toward
the glassy state. This connection was made through the α-relaxation
characteristic time of each component at Tg, τg. The agreement of such constructed curves with
the experimental DSC results is excellent just assuming that τg is not affected by blending.
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Affiliation(s)
- Numera Shafqat
- Materials Physics Center (MPC), Centro de Física de Materiales (CSIC, UPV/EHU), Paseo Manuel de Lardizabal 5, 20018 San Sebastián, Spain
- Manufacture Française des Pneumatiques MICHELIN, Site de Ladoux, 23 Place des Carmes Déchaux, Cedex 63040 Clermont-Ferrand, France
| | - Angel Alegría
- Materials Physics Center (MPC), Centro de Física de Materiales (CSIC, UPV/EHU), Paseo Manuel de Lardizabal 5, 20018 San Sebastián, Spain
- Departamento de Polímeros y Materiales Avanzados: Física, Química y Tecnología (UPV/EHU), Facultad de Química, Universidad del Pais Vasco, 20018 San Sebastián, Spain
| | - Arantxa Arbe
- Materials Physics Center (MPC), Centro de Física de Materiales (CSIC, UPV/EHU), Paseo Manuel de Lardizabal 5, 20018 San Sebastián, Spain
| | - Nicolas Malicki
- Manufacture Française des Pneumatiques MICHELIN, Site de Ladoux, 23 Place des Carmes Déchaux, Cedex 63040 Clermont-Ferrand, France
| | - Séverin Dronet
- Manufacture Française des Pneumatiques MICHELIN, Site de Ladoux, 23 Place des Carmes Déchaux, Cedex 63040 Clermont-Ferrand, France
| | - Lionel Porcar
- Institut Laue-Langevin, 71 Avenue des Martyrs, Grenoble Cedex 9, 38042, France
| | - Juan Colmenero
- Materials Physics Center (MPC), Centro de Física de Materiales (CSIC, UPV/EHU), Paseo Manuel de Lardizabal 5, 20018 San Sebastián, Spain
- Departamento de Polímeros y Materiales Avanzados: Física, Química y Tecnología (UPV/EHU), Facultad de Química, Universidad del Pais Vasco, 20018 San Sebastián, Spain
- Donostia International Physics Center, Paseo Manuel de Lardizabal 4, 20018 San Sebastián, Spain
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4
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Le Bras C, Fosse C, Delbreilh L, Gervais M, Ayad M, Sounakoye AS, Berthe L, Valadon S, Fayolle B. Transition of elastomers from a rubber to glassy state under laser shock conditions. SOFT MATTER 2022; 18:5782-5790. [PMID: 35894254 DOI: 10.1039/d2sm00056c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
The mechanical behaviour of polycarbonate and polydimethylsiloxane (Sylgard184) is studied in this work under laser shock conditions that induce high pressure and strain rates. Laser shock, usually used to reinforce metals, is chosen here because of its capacity to produce strain rates in the 106 s1 range and pressures of GPa order. The pressure and strain rates produced are extracted from the backface velocity profiles and reproduced with the FEM simulation on Abaqus for each laser shot. These two parameters lead to a glass transition shift in the polymers that can induce significant behaviour modifications. We show that Sylgard184, an elastomer with a glass transition temperature of 147 K, exhibits glassy behaviour under such laser shock conditions. By contrast, polycarbonate is already a glassy polymer in its normal state with a glass transition temperature of 415 K; no drastic change in behaviour under shock is evidenced. To discuss these findings in relation to the different mobility domains of the polymer chains under extreme conditions, dielectric relaxation spectroscopy (DRS) measurements are performed to characterize the limits of the rubbery and glassy behaviour for both polymers. As a result, the coupling of the two techniques provides a deeper understanding of the contribution of both the strain rate and pressure to the dynamic glass transition in polymers and thus expands the experimental study range of the two polymers to a strain rate that had not previously been reached.
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Affiliation(s)
- C Le Bras
- Laboratoire PIMM, UMR 8006, ENSAM, CNRS, CNAM, HESAM, 151 boulevard de l'Hôpital, 75013 Paris, France.
- Airbus Operation S.A.S, 316 route de Bayonne-B.P. D4101, CEDEX 9, F-31060 Toulouse, France
| | - C Fosse
- Normandie Univ, UNIROUEN, INSA Rouen, CNRS, GPM, 76000 Rouen, France
| | - L Delbreilh
- Normandie Univ, UNIROUEN, INSA Rouen, CNRS, GPM, 76000 Rouen, France
| | - M Gervais
- Laboratoire PIMM, UMR 8006, ENSAM, CNRS, CNAM, HESAM, 151 boulevard de l'Hôpital, 75013 Paris, France.
| | - M Ayad
- Laboratoire PIMM, UMR 8006, ENSAM, CNRS, CNAM, HESAM, 151 boulevard de l'Hôpital, 75013 Paris, France.
| | | | - L Berthe
- Laboratoire PIMM, UMR 8006, ENSAM, CNRS, CNAM, HESAM, 151 boulevard de l'Hôpital, 75013 Paris, France.
| | - S Valadon
- Airbus Operation S.A.S, 316 route de Bayonne-B.P. D4101, CEDEX 9, F-31060 Toulouse, France
| | - B Fayolle
- Laboratoire PIMM, UMR 8006, ENSAM, CNRS, CNAM, HESAM, 151 boulevard de l'Hôpital, 75013 Paris, France.
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5
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Rijal B, Delbreilh L, Sollogoub C, Baer E, Saiter-Fourcin A. Multiscale Analysis of Segmental Relaxation in PC/PETg Multilayers: Evidence of Immiscible Nanodroplets. Macromolecules 2022. [DOI: 10.1021/acs.macromol.2c00691] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Bidur Rijal
- INSA Rouen, UMR CNRS 6634, Groupe de Physique des Matériaux, Normandie Université, UNIROUEN Normandie, 76801 Saint Etienne du Rouvray, France
| | - Laurent Delbreilh
- INSA Rouen, UMR CNRS 6634, Groupe de Physique des Matériaux, Normandie Université, UNIROUEN Normandie, 76801 Saint Etienne du Rouvray, France
| | - Cyrille Sollogoub
- Laboratoire PIMM, Arts et Metiers Institute of Technology, CNRS, CNAM, HESAM Université, 151 bd de l’Hopital, 75013 Paris, France
| | - Eric Baer
- Department of Macromolecular Science, Case Western Reserve University, Cleveland, Ohio 44106, United States
| | - Allisson Saiter-Fourcin
- INSA Rouen, UMR CNRS 6634, Groupe de Physique des Matériaux, Normandie Université, UNIROUEN Normandie, 76801 Saint Etienne du Rouvray, France
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6
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Shundo A, Yamamoto S, Tanaka K. Network Formation and Physical Properties of Epoxy Resins for Future Practical Applications. JACS AU 2022; 2:1522-1542. [PMID: 35911459 PMCID: PMC9327093 DOI: 10.1021/jacsau.2c00120] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Epoxy resins are used in various fields in a wide range of applications such as coatings, adhesives, modeling compounds, impregnation materials, high-performance composites, insulating materials, and encapsulating and packaging materials for electronic devices. To achieve the desired properties, it is necessary to obtain a better understanding of how the network formation and physical state change involved in the curing reaction affect the resultant network architecture and physical properties. However, this is not necessarily easy because of their infusibility at higher temperatures and insolubility in organic solvents. In this paper, we summarize the knowledge related to these issues which has been gathered using various experimental techniques in conjunction with molecular dynamics simulations. This should provide useful ideas for researchers who aim to design and construct various thermosetting polymer systems including currently popular materials such as vitrimers over epoxy resins.
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Affiliation(s)
- Atsuomi Shundo
- Department
of Applied Chemistry and Center for Polymer Interface and
Molecular Adhesion Science, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Satoru Yamamoto
- Department
of Applied Chemistry and Center for Polymer Interface and
Molecular Adhesion Science, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
| | - Keiji Tanaka
- Department
of Applied Chemistry and Center for Polymer Interface and
Molecular Adhesion Science, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan
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7
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St‐Onge V, Rochon S, Daigle J, Soldera A, Claverie JP. The Unusual Conductivity of Na
+
in PEO‐Based Statistical Copolymer Solid Electrolytes: When Less Means More. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202109709] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Vincent St‐Onge
- Department of Chemistry Faculty of Sciences Université de Sherbrooke 2500 Boul. de l'Université Sherbrooke QC J1K 2R1 Canada
| | - Sylviane Rochon
- Center of Excellence in Transportation Electrification and Energy Storage 1804 Lionel-Boulet, 2nd floor Varennes QC J3X 1S1 Canada
| | - Jean‐Christophe Daigle
- Center of Excellence in Transportation Electrification and Energy Storage 1804 Lionel-Boulet, 2nd floor Varennes QC J3X 1S1 Canada
| | - Armand Soldera
- Department of Chemistry Faculty of Sciences Université de Sherbrooke 2500 Boul. de l'Université Sherbrooke QC J1K 2R1 Canada
| | - Jerome P. Claverie
- Department of Chemistry Faculty of Sciences Université de Sherbrooke 2500 Boul. de l'Université Sherbrooke QC J1K 2R1 Canada
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8
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St-Onge V, Rochon S, Daigle JC, Soldera A, Claverie JP. The Unusual Conductivity of Na + in PEO-Based Statistical Copolymer Solid Electrolytes: When Less Means More. Angew Chem Int Ed Engl 2021; 60:25897-25904. [PMID: 34545680 DOI: 10.1002/anie.202109709] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2021] [Revised: 09/13/2021] [Indexed: 11/06/2022]
Abstract
The low conductivity of Na+ electrolytes in solid polymer electrolytes (SPEs) curtails the development of Na polymer batteries. In this study, NaClO4 (3-24 wt %, 90-9:1 O:Na) is dissolved in statistical copolymers of ethylene oxide (EO) and propylene oxide (PO) (0-20 mol %). Remarkably, the conductivity of these SPEs increases as the concentration of Na+ decreases, thus departing from the usual Nernstian behavior. Using a combination of calorimetric measurements and molecular dynamic simulations, this unusual phenomenon is attributed to the presence of physical cross-links generated by Na+ . As a result, polymers containing a low salt concentration (3 wt %) display a drastically enhanced ionic conductivity (up to 0.2 10-4 S cm-1 at 25 °C), thus paving the way for the design of all-solid-state PEO-based sodium batteries operational at room temperature.
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Affiliation(s)
- Vincent St-Onge
- Department of Chemistry, Faculty of Sciences, Université de Sherbrooke, 2500 Boul. de l'Université, Sherbrooke, QC, J1K 2R1, Canada
| | - Sylviane Rochon
- Center of Excellence in Transportation Electrification and Energy Storage, 1804 Lionel-Boulet, 2nd floor, Varennes, QC, J3X 1S1, Canada
| | - Jean-Christophe Daigle
- Center of Excellence in Transportation Electrification and Energy Storage, 1804 Lionel-Boulet, 2nd floor, Varennes, QC, J3X 1S1, Canada
| | - Armand Soldera
- Department of Chemistry, Faculty of Sciences, Université de Sherbrooke, 2500 Boul. de l'Université, Sherbrooke, QC, J1K 2R1, Canada
| | - Jerome P Claverie
- Department of Chemistry, Faculty of Sciences, Université de Sherbrooke, 2500 Boul. de l'Université, Sherbrooke, QC, J1K 2R1, Canada
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9
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Nguyen HK, Goseki R, Ishizone T, Nakajima K. Effect of molecular weight and architecture on nanoscale viscoelastic heterogeneity at the surface of polymer films. POLYMER 2021. [DOI: 10.1016/j.polymer.2021.123923] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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10
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Moghaddam SM, Quelennec B, Delpouve N, Atawa B, Delbreilh L, Saiter–Fourcin A, Passaglia E, Fiori S. Fragility of short‐chain poly(lactic acid)s derivatives by combining dielectric spectroscopy and fast scanning calorimetry. JOURNAL OF POLYMER SCIENCE 2021. [DOI: 10.1002/pol.20210129] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
| | - Blandine Quelennec
- Groupe de Physique des Matériaux Normandie Univ, UNIROUEN Normandie, INSA Rouen, CNRS Rouen France
| | - Nicolas Delpouve
- Groupe de Physique des Matériaux Normandie Univ, UNIROUEN Normandie, INSA Rouen, CNRS Rouen France
| | - Bienvenu Atawa
- Groupe de Physique des Matériaux Normandie Univ, UNIROUEN Normandie, INSA Rouen, CNRS Rouen France
| | - Laurent Delbreilh
- Groupe de Physique des Matériaux Normandie Univ, UNIROUEN Normandie, INSA Rouen, CNRS Rouen France
| | - Allisson Saiter–Fourcin
- Groupe de Physique des Matériaux Normandie Univ, UNIROUEN Normandie, INSA Rouen, CNRS Rouen France
| | - Elisa Passaglia
- Institute for the Chemistry of OrganoMetallic Compounds (CNR‐ICCOM) SS Pisa Italian National Council for Research Pisa Italy
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11
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Nasseri R, Moresoli C, Yu A, Yuan Z, Xu C(C. Structural dependence of the molecular mobility in acetylated starch. POLYMER 2021. [DOI: 10.1016/j.polymer.2020.123371] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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12
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Bourdet A, Araujo S, Thiyagarajan S, Delbreilh L, Esposito A, Dargent E. Molecular mobility in amorphous biobased copolyesters obtained with 2,5- and 2,4-furandicarboxylate acid. POLYMER 2021. [DOI: 10.1016/j.polymer.2020.123225] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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13
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Gordon CK, Luu R, Lynn D. Capturing nested information from disordered peptide phases. Pept Sci (Hoboken) 2020. [DOI: 10.1002/pep2.24215] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
| | - Regina Luu
- Departments of Chemistry and Biology Emory University Atlanta Georgia USA
| | - David Lynn
- Departments of Chemistry and Biology Emory University Atlanta Georgia USA
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14
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Alzate-Vargas L, Onofrio N, Strachan A. Universality in Spatio-Temporal High-Mobility Domains Across the Glass Transition from Bulk Polymers to Single Chains. Macromolecules 2020. [DOI: 10.1021/acs.macromol.0c00853] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Lorena Alzate-Vargas
- School of Materials Engineering and Birck Nanotechnology Center, Purdue University, West Lafayette, Indiana 47907, United States
| | - Nicolas Onofrio
- Department of Applied Physics, The Hong Kong Polytechnic University, Hung Hom, Hong Kong SAR
| | - Alejandro Strachan
- School of Materials Engineering and Birck Nanotechnology Center, Purdue University, West Lafayette, Indiana 47907, United States
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15
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Dielectric and calorimetric signatures of chain orientation in strong and tough ultrafine electrospun polyacrylonitrile. POLYMER 2019. [DOI: 10.1016/j.polymer.2019.121638] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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16
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Araujo S, Delpouve N, Domenek S, Guinault A, Golovchak R, Szatanik R, Ingram A, Fauchard C, Delbreilh L, Dargent E. Cooperativity Scaling and Free Volume in Plasticized Polylactide. Macromolecules 2019. [DOI: 10.1021/acs.macromol.9b00464] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Steven Araujo
- Normandie Univ, UNIROUEN Normandie, INSA Rouen, CNRS, Groupe de Physique des Matériaux, 76000 Rouen, France
- CEREMA, Direction territoriale Normandie Centre, 76120 Grand-Quevilly, France
| | - Nicolas Delpouve
- Normandie Univ, UNIROUEN Normandie, INSA Rouen, CNRS, Groupe de Physique des Matériaux, 76000 Rouen, France
| | - Sandra Domenek
- UMR Ingénierie Procédés Aliments, AgroParisTech, INRA, Université de Saclay, 1 Avenue des Olympiades, F-91744 Massy Cedex, France
| | - Alain Guinault
- Laboratoire PIMM, Ensam, CNRS, Cnam, 151 Boulevard de l’Hôpital, 75013 Paris, France
| | - Roman Golovchak
- Department of Physics and Astronomy, Austin Peay State University, Clarksville, Tennessee 37044 United States
| | - Roman Szatanik
- Institute of Physics, Opole University, Opole PL-45052, Poland
| | - Adam Ingram
- Faculty of Physics, Opole University of Technology, Opole PL-45370, Poland
| | - Cyrille Fauchard
- CEREMA, Direction territoriale Normandie Centre, 76120 Grand-Quevilly, France
| | - Laurent Delbreilh
- Normandie Univ, UNIROUEN Normandie, INSA Rouen, CNRS, Groupe de Physique des Matériaux, 76000 Rouen, France
| | - Eric Dargent
- Normandie Univ, UNIROUEN Normandie, INSA Rouen, CNRS, Groupe de Physique des Matériaux, 76000 Rouen, France
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17
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Balbuena C, Gianetti MM, Soulé ER. Static and dynamic correlation lengths in supercooled polymers. J Chem Phys 2019; 150:234508. [PMID: 31228894 DOI: 10.1063/1.5091682] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
A key point to understand the glass transition is the relationship between structural and dynamic behavior experienced by a glass former when it approaches Tg. In this work, the relaxation in a simple bead-spring polymer system in the supercooled regime near its glass transition temperature was investigated with molecular dynamic simulations. We develop a new manner to look at the dynamic length scales in a supercooled polymeric system, focusing on correlated motion of particles in an isoconfigurational ensemble (that is, associated with the structure), as measured by Pearson's correlation coefficient. We found that while the usual dynamic four-point correlation length deviates from the structural (mosaic or point-to-set) length scale at low temperatures, Pearson's length behaves similarly to the static length in the whole temperature range. The results lead to a consensus of similar scaling of structural and dynamical length scales, reinforcing the idea of the theories of Adam-Gibbs and random first order transition.
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Affiliation(s)
- Cristian Balbuena
- Institute of Materials Science and Technology (INTEMA), University of Mar del Plata and National Research Council (CONICET), J. B. Justo 4302, 7600 Mar del Plata, Argentina
| | - Melisa M Gianetti
- Institute of Materials Science and Technology (INTEMA), University of Mar del Plata and National Research Council (CONICET), J. B. Justo 4302, 7600 Mar del Plata, Argentina
| | - Ezequiel R Soulé
- Institute of Materials Science and Technology (INTEMA), University of Mar del Plata and National Research Council (CONICET), J. B. Justo 4302, 7600 Mar del Plata, Argentina
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18
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Kipnusu WK, Elsayed M, Iacob C, Pawlus S, Krause-Rehberg R, Paluch M. Glassy dynamics predicted by mutual role of free and activation volumes. SOFT MATTER 2019; 15:4656-4661. [PMID: 31149697 DOI: 10.1039/c9sm00363k] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Broadband Dielectric Spectroscopy (BDS) at elevated pressures and Positron Annihilation Lifetime Spectroscopy (PALS) are employed to elucidate the importance of the ratio of activation and free volumes during vitrification. We show that this ratio has a linear correlation with the structural relaxation of glass forming liquids in a wide temperature range hence engendering it as a vital input in the description of the dynamic glass transition.
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Affiliation(s)
- Wycliffe K Kipnusu
- GROC UJI, Institute of New Imaging Technologies, Department of Physics, Universitat Jaume I, Avda. Sos Baynat s/n, 12071 Castellón, Spain.
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19
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Atawa B, Correia NT, Couvrat N, Affouard F, Coquerel G, Dargent E, Saiter A. Molecular mobility of amorphous N-acetyl-α-methylbenzylamine and Debye relaxation evidenced by dielectric relaxation spectroscopy and molecular dynamics simulations. Phys Chem Chem Phys 2019; 21:702-717. [DOI: 10.1039/c8cp04880k] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Molecular mobility of NAC-MBA molecule is described by means of DRS, FSC and MD simulations.
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20
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Yousefzade O, Valenti S, Puiggalí J, Garmabi H, Macovez R. Segmental relaxation and partial crystallization of chain-extended Poly(l
-lactic acid) reinforced with carboxylated carbon nanotube. ACTA ACUST UNITED AC 2018. [DOI: 10.1002/polb.24774] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Omid Yousefzade
- Department of Polymer Engineering and Color Technology; Amirkabir University of Technology; Tehran Iran
- Chemical Engineering Department and Barcelona Research, Center in Multiscale Science and Engineering; Universitat Politècnica de Catalunya, Escola d'Enginyeria de Barcelona Est-EEBE; c/Eduard Maristany 10-14, Barcelona, E-08019 Spain
| | - Sofia Valenti
- Chemical Engineering Department and Barcelona Research, Center in Multiscale Science and Engineering; Universitat Politècnica de Catalunya, Escola d'Enginyeria de Barcelona Est-EEBE; c/Eduard Maristany 10-14, Barcelona, E-08019 Spain
- Department de Física and Barcelona Research Center in Multiscale Science and Engineering; Universitat Politècnica de Catalunya, Escola d'Enginyeria de Barcelona Est-EEBE; c/Eduard Maristany 10-14, Barcelona, E-08019 Spain
| | - Jordi Puiggalí
- Chemical Engineering Department and Barcelona Research, Center in Multiscale Science and Engineering; Universitat Politècnica de Catalunya, Escola d'Enginyeria de Barcelona Est-EEBE; c/Eduard Maristany 10-14, Barcelona, E-08019 Spain
| | - Hamid Garmabi
- Department of Polymer Engineering and Color Technology; Amirkabir University of Technology; Tehran Iran
| | - Roberto Macovez
- Department de Física and Barcelona Research Center in Multiscale Science and Engineering; Universitat Politècnica de Catalunya, Escola d'Enginyeria de Barcelona Est-EEBE; c/Eduard Maristany 10-14, Barcelona, E-08019 Spain
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21
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Dubey V, Kumar N, Daschakraborty S. Importance of Solvents’ Translational–Rotational Coupling for Translational Jump of a Small Hydrophobic Solute in Supercooled Water. J Phys Chem B 2018; 122:7569-7583. [DOI: 10.1021/acs.jpcb.8b03177] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Vikas Dubey
- Department of Chemistry, Indian Institute of Technology Patna, Patna 801103, Bihar, India
| | - Nitesh Kumar
- Department of Chemistry, Indian Institute of Technology Patna, Patna 801103, Bihar, India
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22
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Manz AS, Paeng K, Kaufman LJ. Single molecule studies reveal temperature independence of lifetime of dynamic heterogeneity in polystyrene. J Chem Phys 2018; 148:204508. [PMID: 29865823 DOI: 10.1063/1.5031131] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Polymeric systems close to their glass transition temperature are known to exhibit heterogeneous dynamics that evolve both over time and space, comparable to the dynamics of small molecule glass formers. It remains unclear how temperature influences the degree of heterogeneous dynamics in such systems. In the following report, a fluorescent perylene dicarboximide probe molecule that reflects the full breadth of heterogeneity of the host was used to examine the temperature dependence of the dynamic heterogeneity lifetime in polystyrene at several temperatures ranging from the glass transition to 10 K above this temperature via single molecule microscopy. Contrary to prior reports, no apparent temperature dependence of time scales associated with dynamic heterogeneity was detected; indeed, the probe molecules report characteristic dynamic heterogeneity lifetimes 100-300 times the average alpha-relaxation time (τα) of the polystyrene host at all temperatures studied.
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Affiliation(s)
- Alyssa S Manz
- Department of Chemistry, Columbia University, New York, New York 10027, USA
| | - Keewook Paeng
- Department of Chemistry, Columbia University, New York, New York 10027, USA
| | - Laura J Kaufman
- Department of Chemistry, Columbia University, New York, New York 10027, USA
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23
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Bourdet A, Esposito A, Thiyagarajan S, Delbreilh L, Affouard F, Knoop RJI, Dargent E. Molecular Mobility in Amorphous Biobased Poly(ethylene 2,5-furandicarboxylate) and Poly(ethylene 2,4-furandicarboxylate). Macromolecules 2018. [DOI: 10.1021/acs.macromol.8b00108] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Aurélie Bourdet
- Groupe de Physique des Matériaux, Normandie Univ, UNIROUEN Normandie, INSA Rouen, CNRS, 76000 Rouen, France
| | - Antonella Esposito
- Groupe de Physique des Matériaux, Normandie Univ, UNIROUEN Normandie, INSA Rouen, CNRS, 76000 Rouen, France
| | | | - Laurent Delbreilh
- Groupe de Physique des Matériaux, Normandie Univ, UNIROUEN Normandie, INSA Rouen, CNRS, 76000 Rouen, France
| | - Frédéric Affouard
- UMET, UMR CNRS 8207, Université Lille 1, 59655 Villeneuve d’Ascq, France
| | - Rutger J. I. Knoop
- Wageningen Food & Biobased Research, P.O. Box 17, 6700 AA Wageningen, The Netherlands
| | - Eric Dargent
- Groupe de Physique des Matériaux, Normandie Univ, UNIROUEN Normandie, INSA Rouen, CNRS, 76000 Rouen, France
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24
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Schammé B, Couvrat N, Tognetti V, Delbreilh L, Dupray V, Dargent É, Coquerel G. Investigation of Drug-Excipient Interactions in Biclotymol Amorphous Solid Dispersions. Mol Pharm 2018; 15:1112-1125. [PMID: 29328661 DOI: 10.1021/acs.molpharmaceut.7b00993] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The effect of low molecular weight excipients on drug-excipient interactions, molecular mobility, and propensity to recrystallization of an amorphous active pharmaceutical ingredient is investigated. Two structurally related excipients (α-pentaacetylglucose and β-pentaacetylglucose), five different drug:excipient ratios (1:5, 1:2, 1:1, 2:1, and 5:1, w/w), and three different solid state characterization tools (differential scanning calorimetry, X-ray powder diffraction, and dielectric relaxation spectroscopy) were selected for the present research. Our investigation has shown that the excipient concentration and its molecular structure reveal quasi-identical molecular dynamic behavior of solid dispersions above and below the glass transition temperature. Across to complementary quantum mechanical simulations, we point out a clear indication of a strong interaction between biclotymol and the acetylated saccharides. Moreover, the thermodynamic study on these amorphous solid dispersions highlighted a stabilizing effect of α-pentaacetylglucose regardless of its quantity while an excessive concentration of β-pentaacetylglucose revealed a poor crystallization inhibition. Finally, through long-term stability studies, we also showed the limiting excipient concentration needed to stabilize our amorphous API. Herewith, the developed procedure in this paper appears to be a promising tool for solid-state characterization of complex pharmaceutical formulations.
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Affiliation(s)
- Benjamin Schammé
- Sciences et Méthodes Séparatives, UNIROUEN , Normandie Université , 76000 Rouen , France.,Groupe de Physique des Matériaux, CNRS, INSA Rouen, UNIROUEN , Normandie Université , 76000 Rouen , France
| | - Nicolas Couvrat
- Sciences et Méthodes Séparatives, UNIROUEN , Normandie Université , 76000 Rouen , France
| | - Vincent Tognetti
- COBRA UMR 6014, CNRS, INSA Rouen, UNIROUEN , Normandie Université , 76821 Mont-Saint-Aignan , France
| | - Laurent Delbreilh
- Groupe de Physique des Matériaux, CNRS, INSA Rouen, UNIROUEN , Normandie Université , 76000 Rouen , France
| | - Valérie Dupray
- Sciences et Méthodes Séparatives, UNIROUEN , Normandie Université , 76000 Rouen , France
| | - Éric Dargent
- Groupe de Physique des Matériaux, CNRS, INSA Rouen, UNIROUEN , Normandie Université , 76000 Rouen , France
| | - Gérard Coquerel
- Sciences et Méthodes Séparatives, UNIROUEN , Normandie Université , 76000 Rouen , France
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25
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Nguyen HK, Konomi A, Sugimoto S, Inutsuka M, Kawaguchi D, Tanaka K. Rotational Dynamics of a Probe in Rubbery Polymers Characterized by Time‐Resolved Fluorescence Anisotropy Measurement. MACROMOL CHEM PHYS 2017. [DOI: 10.1002/macp.201700329] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Hung K. Nguyen
- Department of Applied Chemistry Kyushu University Fukuoka 819‐0395 Japan
| | - Asuka Konomi
- Department of Applied Chemistry Kyushu University Fukuoka 819‐0395 Japan
| | - Shin Sugimoto
- Department of Automotive Science Kyushu University Fukuoka 819‐0395 Japan
| | - Manabu Inutsuka
- Department of Applied Chemistry Kyushu University Fukuoka 819‐0395 Japan
| | - Daisuke Kawaguchi
- Education Center for Global Leaders in Molecular Systems for Devices Kyushu University Fukuoka 819‐0395 Japan
| | - Keiji Tanaka
- Department of Applied Chemistry Kyushu University Fukuoka 819‐0395 Japan
- Department of Automotive Science Kyushu University Fukuoka 819‐0395 Japan
- International Institute for Carbon‐Neutral Energy Research (WPI‐I2CNER) Kyushu University Fukuoka 819‐0395 Japan
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26
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Monnier X, Maigret JE, Lourdin D, Saiter A. Glass transition of anhydrous starch by fast scanning calorimetry. Carbohydr Polym 2017; 173:77-83. [PMID: 28732921 DOI: 10.1016/j.carbpol.2017.05.042] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2017] [Revised: 05/03/2017] [Accepted: 05/14/2017] [Indexed: 11/16/2022]
Abstract
By means of fast scanning calorimetry, the glass transition of anhydrous amorphous starch has been measured. With a scanning rate of 2000Ks-1, thermal degradation of starch prior to the glass transition has been inhibited. To certify the glass transition measurement, structural relaxation of the glassy state has been investigated through physical aging as well as the concept of limiting fictive temperature. In both cases, characteristic enthalpy recovery peaks related to the structural relaxation of the glass have been observed. Thermal lag corrections based on the comparison of glass transition temperatures measured by means of differential and fast scanning calorimetry have been proposed. The complementary investigations give an anhydrous amorphous starch glass transition temperature of 312±7°C. This estimation correlates with previous extrapolation performed on hydrated starches.
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Affiliation(s)
- Xavier Monnier
- Normandie Univ, UNIROUEN Normandie, INSA Rouen, CNRS, Groupe de Physique des Matériaux, 76000 Rouen, France
| | - Jean-Eudes Maigret
- INRA, UR1268 BIA Biopolymers Interactions & Assemblies, 44300, Nantes, France
| | - Denis Lourdin
- INRA, UR1268 BIA Biopolymers Interactions & Assemblies, 44300, Nantes, France.
| | - Allisson Saiter
- Normandie Univ, UNIROUEN Normandie, INSA Rouen, CNRS, Groupe de Physique des Matériaux, 76000 Rouen, France
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27
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Rijal B, Soto Puente JA, Atawa B, Delbreilh L, Fatyeyeva K, Saiter A, Dargent E. Correlated and cooperative motions in segmental relaxation: Influence of constitutive unit weight and intermolecular interactions. Phys Rev E 2017; 94:062502. [PMID: 28085415 DOI: 10.1103/physreve.94.062502] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2016] [Indexed: 11/07/2022]
Abstract
This work clarifies the notion of correlated and cooperative motions appearing during the α-relaxation process through the role of the molecular weight of the constitutive units and of the interchain dipolar interactions. By studying amorphous copolymers of poly(ethylene-co-vinyl acetate) with different vinyl acetate contents, we show that the correlated motions are not sensitive to the interchain dipolar interactions, in contrast to the cooperative motions, which increase with a strengthening of the intermolecular interactions for this sample family. Concerning the influence of the molecular weight m_{0}, the notion of "correlated motions" seems to be equivalent to the notion of "cooperative motions" only for low m_{0} systems.
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Affiliation(s)
- Bidur Rijal
- Normandie Université, UNIROUEN, LECAP, 76000 Rouen, France
| | - Jorge Arturo Soto Puente
- Normandie Université, UNIROUEN, LECAP, 76000 Rouen, France.,Normandie Université, UNIROUEN, INSA Rouen, CNRS, PBS, 76000 Rouen, France
| | - Bienvenu Atawa
- Normandie Université, UNIROUEN, LECAP, 76000 Rouen, France
| | | | - Kateryna Fatyeyeva
- Normandie Université, UNIROUEN, INSA Rouen, CNRS, PBS, 76000 Rouen, France
| | | | - Eric Dargent
- Normandie Université, UNIROUEN, LECAP, 76000 Rouen, France
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28
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A measure of cooperativity in non-Arrhenius structural relaxation in terms of the bond strength–coordination number fluctuation model. Eur Polym J 2017. [DOI: 10.1016/j.eurpolymj.2016.11.005] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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29
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Tombari E, Pieruccini M. Cooperativity at the glass transition: A perspective from facilitation on the analysis of relaxation in modulated calorimetry. Phys Rev E 2016; 94:052504. [PMID: 27967068 DOI: 10.1103/physreve.94.052504] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2016] [Indexed: 11/07/2022]
Abstract
The glass transition region in nonconfined polymeric and low-molecular-weight supercooled liquids is probed by temperature-modulated calorimetry at a frequency of 3.3 mHz. From the distribution of relaxation times derived by analyzing the complex heat capacity, the number N_{α} of cooperatively rearranging units is estimated. This is done by resorting to a method in which cooperative motion is viewed as a result of a spontaneous regression of energy fluctuations. After a first, local, structural transition occurs, the energy threshold for the rearrangement of adjacent molecular units decreases progressively. This facilitation process is associated to a corresponding evolution of the density of states in a canonical representation and may be considered as a continuous spanning through different dynamic states toward a condition in which configurational constraints disappear. A good agreement is found with the N_{α} values obtained from the same calorimetric data within the framework of Donth's fluctuation theory. It is shown that, at variance from previous treatments, N_{α} can be estimated from just the relaxation function, without resorting to the knowledge of the configurational entropy. Examples point to a modest dependence of the N_{α} estimates on the experimental method used to derive the relaxation function.
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Affiliation(s)
- Elpidio Tombari
- CNR, Istituto per i Processi Chimico-Fisici, v. Moruzzi 1, 56124 Pisa, Italy
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30
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Charlon S, Delbreilh L, Dargent E, Follain N, Soulestin J, Marais S. Influence of crystallinity on the dielectric relaxations of poly(butylene succinate) and poly[(butylene succinate)-co-(butylene adipate)]. Eur Polym J 2016. [DOI: 10.1016/j.eurpolymj.2016.09.045] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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31
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Zhang H, Tao K, Liu D, Wu K, Wang F, Yang J, Zhao J. Examining dynamics in a polymer matrix by single molecule fluorescence probes of different sizes. SOFT MATTER 2016; 12:7299-7306. [PMID: 27507703 DOI: 10.1039/c6sm01447j] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Rotational motion of single fluorescence probes with different sizes doped inside films of polyvinylacetate is investigated by defocused single molecule fluorescence microscopy. Discrete vibration modes in the rotational motion of individual probes are clearly exposed in the power spectra of the rotation trajectories, reflecting multiple relaxation dynamics and also the difference in dynamics among separate locations. The power spectra show a strong dependence on the probe size and temperature. By sampling the rotation of a large number of probes, the averaged power spectra show that the activated rotation of the probes falls into the frequency range of the α-relaxation and data analysis shows that activation of the vibration modes with all probes corresponds to the maximum population of rotating probes, and this made the comparison between single molecule data and the ensemble data meaningful (differential scanning calorimetry, as an example). Such an analysis shows a coincidence between the temperature of a significant occurrence of glass transition and the activation of rotational motion of all probes with one specific size, indicating that such a dimension correlates with the size of the cooperative rearrangement region - a volume of approximately 1.0 nm(3).
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Affiliation(s)
- Hao Zhang
- Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
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32
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Schammé B, Mignot M, Couvrat N, Tognetti V, Joubert L, Dupray V, Delbreilh L, Dargent E, Coquerel G. Molecular Relaxations in Supercooled Liquid and Glassy States of Amorphous Quinidine: Dielectric Spectroscopy and Density Functional Theory Approaches. J Phys Chem B 2016; 120:7579-92. [PMID: 27391029 DOI: 10.1021/acs.jpcb.6b04242] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
In this article, we conduct a comprehensive molecular relaxation study of amorphous Quinidine above and below the glass-transition temperature (Tg) through broadband dielectric relaxation spectroscopy (BDS) experiments and theoretical density functional theory (DFT) calculations, as one major issue with the amorphous state of pharmaceuticals is life expectancy. These techniques enabled us to determine what kind of molecular motions are responsible, or not, for the devitrification of Quinidine. Parameters describing the complex molecular dynamics of amorphous Quinidine, such as Tg, the width of the α relaxation (βKWW), the temperature dependence of α-relaxation times (τα), the fragility index (m), and the apparent activation energy of secondary γ relaxation (Ea-γ), were characterized. Above Tg (> 60 °C), a medium degree of nonexponentiality (βKWW = 0.5) was evidenced. An intermediate value of the fragility index (m = 86) enabled us to consider Quinidine as a glass former of medium fragility. Below Tg (< 60 °C), one well-defined secondary γ relaxation, with an apparent activation energy of Ea-γ = 53.8 kJ/mol, was reported. From theoretical DFT calculations, we identified the most reactive part of Quinidine moieties through exploration of the potential energy surface. We evidenced that the clearly visible γ process has an intramolecular origin coming from the rotation of the CH(OH)C9H14N end group. An excess wing observed in amorphous Quinidine was found to be an unresolved Johari-Goldstein relaxation. These studies were supplemented by sub-Tg experimental evaluations of the life expectancy of amorphous Quinidine by X-ray powder diffraction and differential scanning calorimetry. We show that the difference between Tg and the onset temperature for crystallization, Tc, which is 30 K, is sufficiently large to avoid recrystallization of amorphous Quinidine during 16 months of storage under ambient conditions.
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Affiliation(s)
- Benjamin Schammé
- Normandie Univ, Laboratoire SMS - EA3233, Univ Rouen , F-76821 Mont Saint Aignan, France.,AMME-LECAP EA 4528 International Lab, Avenue de l'Université, BP12, Normandie Univ, Université de Rouen Normandie , 76801 St Etienne du Rouvray, France
| | - Mélanie Mignot
- Normandie Univ, Laboratoire SMS - EA3233, Univ Rouen , F-76821 Mont Saint Aignan, France
| | - Nicolas Couvrat
- Normandie Univ, Laboratoire SMS - EA3233, Univ Rouen , F-76821 Mont Saint Aignan, France
| | - Vincent Tognetti
- COBRA UMR 6014 and FR 3038, Normandie Univ, Université de Rouen, INSA Rouen, CNRS , F-76821 Mont Saint Aignan, Cedex, France
| | - Laurent Joubert
- COBRA UMR 6014 and FR 3038, Normandie Univ, Université de Rouen, INSA Rouen, CNRS , F-76821 Mont Saint Aignan, Cedex, France
| | - Valérie Dupray
- Normandie Univ, Laboratoire SMS - EA3233, Univ Rouen , F-76821 Mont Saint Aignan, France
| | - Laurent Delbreilh
- AMME-LECAP EA 4528 International Lab, Avenue de l'Université, BP12, Normandie Univ, Université de Rouen Normandie , 76801 St Etienne du Rouvray, France
| | - Eric Dargent
- AMME-LECAP EA 4528 International Lab, Avenue de l'Université, BP12, Normandie Univ, Université de Rouen Normandie , 76801 St Etienne du Rouvray, France
| | - Gérard Coquerel
- Normandie Univ, Laboratoire SMS - EA3233, Univ Rouen , F-76821 Mont Saint Aignan, France
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33
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Saiter A, Delpouve N, Dargent E, Oberhauser W, Conzatti L, Cicogna F, Passaglia E. Probing the chain segment mobility at the interface of semi-crystalline polylactide/clay nanocomposites. Eur Polym J 2016. [DOI: 10.1016/j.eurpolymj.2016.03.040] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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