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Moura Ramos JJ, Viciosa MT, Diogo HP. Thermal behaviour of two anti-inflammatory drugs (celecoxib and rofecoxib) and slow relaxation dynamics in their amorphous solid state. Comparison between the dynamic fragility obtained by dielectric spectroscopy and by thermostimulated currents. Mol Phys 2018. [DOI: 10.1080/00268976.2018.1533146] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- Joaquim J. Moura Ramos
- CQE – Centro de Química Estrutural, Complexo I, Instituto Superior Técnico, Universidade de Lisboa, Lisboa, Portugal
- CQFM – Centro de Química-Física Molecular, Instituto Superior Técnico, Universidade de Lisboa, Lisboa, Portugal
| | - M. Teresa Viciosa
- CQE – Centro de Química Estrutural, Complexo I, Instituto Superior Técnico, Universidade de Lisboa, Lisboa, Portugal
- CQFM – Centro de Química-Física Molecular, Instituto Superior Técnico, Universidade de Lisboa, Lisboa, Portugal
| | - Hermínio P. Diogo
- CQE – Centro de Química Estrutural, Complexo I, Instituto Superior Técnico, Universidade de Lisboa, Lisboa, Portugal
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2
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Švajdlenková H, Arrese-Igor S, Nógellová Z, Alegría A, Bartoš J. Molecular dynamic heterogeneity in relation to free volume and relaxation dynamics in organic glass-formers: oligomeric cis-1,4-poly(isoprene). Phys Chem Chem Phys 2018; 19:15215-15226. [PMID: 28561833 DOI: 10.1039/c7cp00446j] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Herein, a combined study of the molecular rotation dynamics and free volume in cis-1,4-poly(isoprene) using two external probing techniques via ESR and PALS together with relaxation dynamics of the host medium via BDS is presented. The spectral evolution of the spin probe TEMPO from simulations over a wide range from 100 K up to 300 K exhibits three different regions of its correlation time consisting of a slow regime at low temperatures followed by the molecular dynamic heterogeneity zone from T = T = 155 K = 0.82 × T up to Tc ≅ 236 K = 1.26 × T and ending with a fast regime at high temperatures with the further characteristic ESR temperatures, T = 186 K ≅ T and T = 260 K. These are in close coincidence with four characteristic PALS temperatures: T = 160 K, T = 190 K, T = 227 K, and T = 263 K. Finally, using BDS, we revealed that the high-frequency features of the structural relaxation of 1,4-PIP 0.8k were related to the observed effects in the ESR and PALS response of the liquid state.
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Affiliation(s)
- H Švajdlenková
- Department of Structure and Physical Properties, Polymer Institute of SAS, Dúbravská cesta 9, SK-845 41 Bratislava, Slovakia.
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Peng YJ, Cai CT, Zhang RC, Chen TH, Sun PC, Li BH, Wang XL, Xue G, Shi AC. Probing the two-stage transition upon crossing the glass transition of polystyrene by solid-state NMR. CHINESE JOURNAL OF POLYMER SCIENCE 2016. [DOI: 10.1007/s10118-016-1762-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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4
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Rijal B, Delbreilh L, Saiter A. Dynamic Heterogeneity and Cooperative Length Scale at Dynamic Glass Transition in Glass Forming Liquids. Macromolecules 2015. [DOI: 10.1021/acs.macromol.5b01152] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Bidur Rijal
- AMME-LECAP
EA 4528 International
Laboratory, Normandie Université, Université et INSA de Rouen, Av. de l’Université BP 12, 76801 Saint Etienne du Rouvray Cedex, France
| | - Laurent Delbreilh
- AMME-LECAP
EA 4528 International
Laboratory, Normandie Université, Université et INSA de Rouen, Av. de l’Université BP 12, 76801 Saint Etienne du Rouvray Cedex, France
| | - Allisson Saiter
- AMME-LECAP
EA 4528 International
Laboratory, Normandie Université, Université et INSA de Rouen, Av. de l’Université BP 12, 76801 Saint Etienne du Rouvray Cedex, France
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5
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Lu H, Zhou Z, Hao T, Ye X, Ne Y. Temperature Dependence of Structural Properties and Chain Configurational Study: A Molecular Dynamics Simulation of Polyethylene Chains. MACROMOL THEOR SIMUL 2015. [DOI: 10.1002/mats.201500007] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Haifeng Lu
- School of Materials Science and Engineering; Jiangsu University; 301 Xuefu Road Zhenjiang 212013 China
| | - Zhiping Zhou
- School of Materials Science and Engineering; Jiangsu University; 301 Xuefu Road Zhenjiang 212013 China
| | - Tongfan Hao
- School of Materials Science and Engineering; Jiangsu University; 301 Xuefu Road Zhenjiang 212013 China
| | - Xubo Ye
- School of Materials Science and Engineering; Jiangsu University; 301 Xuefu Road Zhenjiang 212013 China
| | - Yijing Ne
- School of Materials Science and Engineering; Jiangsu University; 301 Xuefu Road Zhenjiang 212013 China
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6
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Mirigian S, Schweizer KS. Dynamical Theory of Segmental Relaxation and Emergent Elasticity in Supercooled Polymer Melts. Macromolecules 2015. [DOI: 10.1021/ma5022083] [Citation(s) in RCA: 76] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Stephen Mirigian
- Departments of Materials
Science, Chemical and Biomolecular Engineering, Chemistry and Frederick
Seitz Materials Research Laboratory, University of Illinois, 1304 West
Green Street, Urbana, Illinois 61801, United States
| | - Kenneth S. Schweizer
- Departments of Materials
Science, Chemical and Biomolecular Engineering, Chemistry and Frederick
Seitz Materials Research Laboratory, University of Illinois, 1304 West
Green Street, Urbana, Illinois 61801, United States
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7
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Mora E, Diogo HP, Moura Ramos JJ. The features of the normal mode relaxation as studied by thermally stimulated currents. Eur Polym J 2015. [DOI: 10.1016/j.eurpolymj.2015.01.006] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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8
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Mora E, Brás AR, Pyckhout-Hintzen W, Diogo HP, Moura Ramos JJ. The segmental and chain relaxation modes in high-cis-polyisoprene as studied by thermally stimulated currents. J Chem Phys 2015; 142:044903. [PMID: 25638005 DOI: 10.1063/1.4906542] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
The technique of Thermally Stimulated Currents is used to study the slow molecular mobility in a series of poly (1,4-cis-isoprene) samples with different molecular weights, Mw, and low polydispersity. The technique revealed a high resolution power, particularly useful in the study of the lower molecular weight samples where the chain and the segmental relaxations strongly overlap. The dynamic crossover that is reported for the normal mode by varying the molecular weight is clearly revealed by the thermally stimulated depolarization currents results through the temperature location, TMn, of the normal mode peak, the values of the relaxation time at TMn, τ(TMn), and the value of the fragility index of the normal mode, mn. The kinetic features of the glass transition relaxation of polyisoprene have also been determined.
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Affiliation(s)
- Elsa Mora
- CQE-Centro de Química Estrutural, Universidade de Lisboa, Complexo I, IST, 1049-001 Lisboa, Portugal
| | - Ana R Brás
- Jülich Centre for Neutron Science and Institute for Complex Systems, Forschungszentrum Jülich, 52425 Jülich, Germany
| | - Wim Pyckhout-Hintzen
- Jülich Centre for Neutron Science and Institute for Complex Systems, Forschungszentrum Jülich, 52425 Jülich, Germany
| | - Hermínio P Diogo
- CQE-Centro de Química Estrutural, Universidade de Lisboa, Complexo I, IST, 1049-001 Lisboa, Portugal
| | - Joaquim J Moura Ramos
- CQFM-Centro de Química-Física Molecular and IN-Institute of Nanoscience and Nanotechnology, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisboa, Portugal
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9
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Wu X, Wang H, Zhu Z, Liu CS. Quantifying Changes in the Low-Frequency Dynamics of Amorphous Polymers by 2D Correlation Mechanical Spectroscopy. J Phys Chem B 2012; 117:467-72. [DOI: 10.1021/jp311652h] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Xuebang Wu
- Key Laboratory of Materials Physics,
Institute of Solid
State Physics, Chinese Academy of Sciences, P.O. Box 1129, Hefei 230031, P. R. China
| | - Huaguang Wang
- Key Laboratory of Materials Physics,
Institute of Solid
State Physics, Chinese Academy of Sciences, P.O. Box 1129, Hefei 230031, P. R. China
| | - Zhengang Zhu
- Key Laboratory of Materials Physics,
Institute of Solid
State Physics, Chinese Academy of Sciences, P.O. Box 1129, Hefei 230031, P. R. China
| | - C. S. Liu
- Key Laboratory of Materials Physics,
Institute of Solid
State Physics, Chinese Academy of Sciences, P.O. Box 1129, Hefei 230031, P. R. China
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Martinez-Garcia JC, Martinez-Garcia J, Rzoska SJ, Hulliger J. The new insight into dynamic crossover in glass forming liquids from the apparent enthalpy analysis. J Chem Phys 2012; 137:064501. [DOI: 10.1063/1.4739750] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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11
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Griffin P, Agapov AL, Kisliuk A, Sun XG, Dai S, Novikov VN, Sokolov AP. Decoupling charge transport from the structural dynamics in room temperature ionic liquids. J Chem Phys 2011; 135:114509. [DOI: 10.1063/1.3638269] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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12
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Richert R, Agapov A, Sokolov AP. Appearance of a Debye process at the conductivity relaxation frequency of a viscous liquid. J Chem Phys 2011; 134:104508. [DOI: 10.1063/1.3565481] [Citation(s) in RCA: 72] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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13
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He X, Wu J, Huang G, Wang X. Effect of Alkyl Side Chain Length on Relaxation Behaviors in Poly(n-alkyl Acrylates) and Poly(n-alkyl Methacrylates). J MACROMOL SCI B 2010. [DOI: 10.1080/00222341003648870] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Xiaojun He
- a College of Polymer Science and Engineering , State Key Laboratory of Polymer Material Engineering, Sichuan University , Chengdu, China
| | - Jinrong Wu
- a College of Polymer Science and Engineering , State Key Laboratory of Polymer Material Engineering, Sichuan University , Chengdu, China
| | - Guangsu Huang
- a College of Polymer Science and Engineering , State Key Laboratory of Polymer Material Engineering, Sichuan University , Chengdu, China
| | - Xiaoan Wang
- a College of Polymer Science and Engineering , State Key Laboratory of Polymer Material Engineering, Sichuan University , Chengdu, China
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14
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Bormuth A, Henritzi P, Vogel M. Chain-Length Dependence of the Segmental Relaxation in Polymer Melts: Molecular Dynamics Simulation Studies on Poly(propylene oxide). Macromolecules 2010. [DOI: 10.1021/ma101721d] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- A. Bormuth
- Institut für Festkörperphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany
| | - P. Henritzi
- Institut für Festkörperphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany
| | - M. Vogel
- Institut für Festkörperphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany
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15
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Paluch M, Pawlus S, Sokolov AP, Ngai KL. Sub-Rouse Modes in Polymers Observed by Dielectric Spectroscopy. Macromolecules 2010. [DOI: 10.1021/ma9027382] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Marian Paluch
- Institute of Physics, Silesian Univ., ul. Uniwersytecka 4, 40-007 Katowice, Poland
| | - Sebastian Pawlus
- Institute of Physics, Silesian Univ., ul. Uniwersytecka 4, 40-007 Katowice, Poland
| | - Alexei P. Sokolov
- Chemical Sciences Division, Oak Ridge National Laboratory, Tennessee 37831-6197, and Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996-1600
| | - K. L. Ngai
- Naval Research Laboratory, Washington, D.C. 20375-5320
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16
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Chen K, Saltzman EJ, Schweizer KS. Segmental dynamics in polymers: from cold melts to ageing and stressed glasses. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2009; 21:503101. [PMID: 21836211 DOI: 10.1088/0953-8984/21/50/503101] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Recent progress in developing statistical mechanical theories of supercooled polymer melts and glasses is reviewed. The focus is on those approaches that are either explicitly formulated for polymers, or are applications of more generic theories to interpret polymeric phenomena. These include two configurational entropy theories, a percolated free volume distribution model, and the activated barrier hopping nonlinear Langevin theory. Both chemically-specific and universal aspects are discussed. After a brief summary of classic phenomenological approaches, a discussion of the relevant length scales and key experimental phenomena in both the supercooled liquid and glassy solid state is presented including ageing and nonlinear mechanical response. The central concepts that underlie the theories in the molten state are then summarized and key predictions discussed, including the glass transition in oriented polymer liquids and deformed rubber networks. Physical ageing occurs in the nonequilibrium glass, and theories for its consequences on the alpha relaxation are discussed. Very recent progress in developing a segment scale theory for the dramatic effects of external stress on polymer glasses, including acceleration of relaxation, yielding, plastic flow and strain hardening, is summarized. The article concludes with a discussion of outstanding theoretical challenges.
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Wu X, Zhu Z. Dynamic Crossover of α′ Relaxation in Poly(vinyl acetate) above Glass Transition via Mechanical Spectroscopy. J Phys Chem B 2009; 113:11147-52. [DOI: 10.1021/jp903523x] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Xuebang Wu
- Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, P.O. Box 1129, Hefei, Anhui, P. R. China
| | - Zhengang Zhu
- Key Laboratory of Materials Physics, Institute of Solid State Physics, Chinese Academy of Sciences, P.O. Box 1129, Hefei, Anhui, P. R. China
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18
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Wu R, Kong B, Yang X. Conformational transition characterization of glass transition behavior of polymers. POLYMER 2009. [DOI: 10.1016/j.polymer.2009.05.013] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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