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Holler S, Moreno AJ, Zamponi M, Bačová P, Willner L, Iatrou H, Falus P, Richter D. The Role of the Functionality in the Branch Point Motion in Symmetric Star Polymers: A Combined Study by Simulations and Neutron Spin Echo Spectroscopy. Macromolecules 2017. [DOI: 10.1021/acs.macromol.7b01579] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Stefan Holler
- Forschungszentrum
Jülich GmbH, 52425 Jülich, Germany
- Centro de Física
de Materiales (CSIC, UPV/EHU) and Materials Physics Center MPC, Paseo Manuel de Lardizabal 5, 20018 San Sebastián, Spain
| | - Angel J. Moreno
- Centro de Física
de Materiales (CSIC, UPV/EHU) and Materials Physics Center MPC, Paseo Manuel de Lardizabal 5, 20018 San Sebastián, Spain
- Donostia
International
Physics Center, Paseo Manuel de Lardizabal
4, 20018 San Sebastian, Spain
| | | | - Petra Bačová
- Centro de Física
de Materiales (CSIC, UPV/EHU) and Materials Physics Center MPC, Paseo Manuel de Lardizabal 5, 20018 San Sebastián, Spain
- Institute
of Applied and Computational Mathematics (IACM), Foundation for Research and Technology Hellas (FORTH), 71110 Heraklion, Crete Greece
| | - Lutz Willner
- Forschungszentrum
Jülich GmbH, 52425 Jülich, Germany
| | - Hermis Iatrou
- Department
of Chemistry, University of Athens, Panepistimiopolis Zografou, 15771 Athens, Greece
| | - Peter Falus
- Institut Laue-Langevin, 71 Avenue
des Martyrs, CS 20156, Cedex 9 38042 Grenoble, France
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Roland CM, Bero CA, Ngai KL, Antonietti M. Segmental Relaxation in Crosslinked Rubber. ACTA ACUST UNITED AC 2011. [DOI: 10.1557/proc-411-367] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
ABSTRACTStudies of the local segmental relaxation in rubbery networks reveal a variety of behaviors. In experiments on networks with labeled junctions, whereby the motion of the crosslink site is specifically monitored, the segmental relaxation function broadens, accompanied by a larger activation energy, in a manner well-described by the coupling model of relaxation. The more usual experiment simply measures bulk relaxation, without discriminating among different relaxing entities. For networks, crosslinking introduces a distribution of relaxation behaviors, related to the proximity of a moiety to the junctions. The resulting inhomogeneously broadened relaxation function is difficult to analyze; nevertheless, a heightened sensitivity to temperature (larger activation energy) is exhibited, from which inferences can be made regarding the shape of the relaxation function. Finally, the segmental relaxation of highly crosslinked microgels is ostensibly homogeneous. Interestingly, however, the inverse correlation between the stretch exponent, β, and the activation energy, observed quantitatively in conventional networks, is violated by the microgels.
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Zamponi M, Pyckhout-Hintzen W, Wischnewski A, Monkenbusch M, Willner L, Kali G, Richter D. Molecular Observation of Branch Point Motion in Star Polymer Melts. Macromolecules 2009. [DOI: 10.1021/ma9017185] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
| | | | | | | | | | - György Kali
- Institut Laue-Langevin, 6 rue Jules Horowitz, 38000 Grenoble, France
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Nedelcu S, Sommer JU. Single chain dynamics in polymer networks: A Monte Carlo study. J Chem Phys 2009; 130:204902. [PMID: 19485476 DOI: 10.1063/1.3143182] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- S Nedelcu
- Leibniz Institute of Polymer Research, Dresden e.V., 01069 Dresden, Germany.
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Higgins JS, Ma K, Hall RH. Separation of the motion around cross-link points from main chain motion in network samples. ACTA ACUST UNITED AC 2000. [DOI: 10.1088/0022-3719/14/33/009] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Leezenberg PB, Marcus AH, Frank CW, Fayer MD. Rotational Dynamics of Naphthalene-Labeled Cross-link Junctions in Poly(dimethylsiloxane) Elastomers. ACTA ACUST UNITED AC 1996. [DOI: 10.1021/jp953632u] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Pieter B. Leezenberg
- Departments of Materials Science and Engineering, Chemistry, and Chemical Engineering, Stanford University, Stanford, California 94305-5025
| | - A. H. Marcus
- Departments of Materials Science and Engineering, Chemistry, and Chemical Engineering, Stanford University, Stanford, California 94305-5025
| | - Curtis W. Frank
- Departments of Materials Science and Engineering, Chemistry, and Chemical Engineering, Stanford University, Stanford, California 94305-5025
| | - M. D. Fayer
- Departments of Materials Science and Engineering, Chemistry, and Chemical Engineering, Stanford University, Stanford, California 94305-5025
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Duering ER, Kremer K, Grest GS. Structure and relaxation of end‐linked polymer networks. J Chem Phys 1994. [DOI: 10.1063/1.468202] [Citation(s) in RCA: 153] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Rubinstein M, Leibler L, Bastide J. Giant fluctuations of crosslink positions in gels. PHYSICAL REVIEW LETTERS 1992; 68:405-407. [PMID: 10045883 DOI: 10.1103/physrevlett.68.405] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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Paul W, Binder K, Heermann DW, Kremer K. Dynamics of polymer solutions and melts. Reptation predictions and scaling of relaxation times. J Chem Phys 1991. [DOI: 10.1063/1.461346] [Citation(s) in RCA: 275] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Oeser R, Ewen B, Richter D, Farago B. Dynamic fluctuations of crosslinks in a rubber: A neutron-spin-echo study. PHYSICAL REVIEW LETTERS 1988; 60:1041-1044. [PMID: 10037926 DOI: 10.1103/physrevlett.60.1041] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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22. Polymers. ACTA ACUST UNITED AC 1987. [DOI: 10.1016/s0076-695x(08)60773-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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