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Wei X, Luo T. Chain length effect on thermal transport in amorphous polymers and a structure–thermal conductivity relation. Phys Chem Chem Phys 2019; 21:15523-15530. [DOI: 10.1039/c9cp02397f] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The physics of thermal transport in polymers is important in many applications, such as in heat exchangers and electronics packaging.
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Affiliation(s)
- Xingfei Wei
- Department of Aerospace and Mechanical Engineering
- University of Notre Dame
- Notre Dame IN 46556
- USA
| | - Tengfei Luo
- Department of Aerospace and Mechanical Engineering
- University of Notre Dame
- Notre Dame IN 46556
- USA
- Department of Chemical and Biomolecular Engineering
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Tanaka Y, Kashiwabara S, Okuya Y. Time-temperature superposition in the enthalpy relaxation study of polystyrene. POLYM ENG SCI 2016. [DOI: 10.1002/pen.24280] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Yutaka Tanaka
- Department of Materials Science and Engineering, Faculty of Engineering; University of Fukui; Bunkyo Fukui 910-8507 Japan
| | - Shiho Kashiwabara
- Department of Materials Science and Engineering, Faculty of Engineering; University of Fukui; Bunkyo Fukui 910-8507 Japan
| | - Yutaro Okuya
- Department of Materials Science and Engineering, Faculty of Engineering; University of Fukui; Bunkyo Fukui 910-8507 Japan
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Zhang H, Douglas JF. Glassy Interfacial Dynamics of Ni Nanoparticles: Part I Colored Noise, Dynamic Heterogeneity and Collective Atomic Motion. SOFT MATTER 2013; 9:1254-1265. [PMID: 25170342 PMCID: PMC4144362 DOI: 10.1039/c2sm26789f] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Most condensed materials exhibit a significant fraction of atoms, molecules or particles that are strongly interacting with each other, while being configured geometrically at any instant of time in an 'amorphous' state having a relatively uniform density. Recently, both simulations and experiments have revealed that the dynamics of diverse condensed amorphous materials is generally characterized by significant heterogeneity in the local mobility and by progressively increasing collective motion upon cooling that takes the form of string-like collective particle rearrangements. The direct experimental observation of this type of collective motion, which has been directly linked to the growing relaxation times of glass-forming materials, and its quantification under different thermodynamic conditions, has so far been restricted to colloidal and driven granular fluids. The present work addresses the fundamental problem of how to determine the scale of this type of collective motion in materials composed of molecules or atoms. The basic premise of our work is that large scale dynamic particle clustering in amorphous materials must give rise to large fluctuations in particle mobility so that transport properties, especially those related to particle mobility, should naturally exhibit noise related to the cooperative motion scale. In our initial exploratory study seeking a relationship of this kind, we find 1/fα or 'colored noise', in both potential energy and particle displacements fluctuations of the atoms within the glassy interfacial layer of Ni nanoparticles (NPs). A direct relation between the particle displacement (mobility) noise exponent α and the average polymerization index of the string-like collective motion L is observed for a range of NP sizes, temperatures and for surface doping of the NPs with other metal atoms (Ag, Au, Pt) to change of fragility of the glassy interfacial layer at the surface of the Ni NPs. We also introduce a successful analytic model to understand this relationship between α and L.
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Affiliation(s)
- Hao Zhang
- Department of Chemical and Materials Engineering, University of Alberta, AB T6G 2V4 Canada
| | - Jack F. Douglas
- Materials Science and Engineering Division, National Institute of Standards and Technology, Gaithersburg, Maryland, 20899 USA
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Zhang X, Fujii M. Measurements of the thermal conductivity and thermal diffusivity of polymers. POLYM ENG SCI 2004. [DOI: 10.1002/pen.10148] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Eckstein A, Suhm J, Friedrich C, Maier RD, Sassmannshausen J, Bochmann M, Mülhaupt R. Determination of Plateau Moduli and Entanglement Molecular Weights of Isotactic, Syndiotactic, and Atactic Polypropylenes Synthesized with Metallocene Catalysts. Macromolecules 1998. [DOI: 10.1021/ma971270d] [Citation(s) in RCA: 208] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- A. Eckstein
- Freiburger Materialforschungszentrum (F M F) and Institut für Makromolekulare Chemie, Albert-Ludwigs-Universität, Stefan-Meier-Strasse 21 and 31, D-79104 Freiburg, Germany, and School of Chemistry, University of Leeds, Leeds LS2 9JT, U.K
| | - J. Suhm
- Freiburger Materialforschungszentrum (F M F) and Institut für Makromolekulare Chemie, Albert-Ludwigs-Universität, Stefan-Meier-Strasse 21 and 31, D-79104 Freiburg, Germany, and School of Chemistry, University of Leeds, Leeds LS2 9JT, U.K
| | - C. Friedrich
- Freiburger Materialforschungszentrum (F M F) and Institut für Makromolekulare Chemie, Albert-Ludwigs-Universität, Stefan-Meier-Strasse 21 and 31, D-79104 Freiburg, Germany, and School of Chemistry, University of Leeds, Leeds LS2 9JT, U.K
| | - R.-D. Maier
- Freiburger Materialforschungszentrum (F M F) and Institut für Makromolekulare Chemie, Albert-Ludwigs-Universität, Stefan-Meier-Strasse 21 and 31, D-79104 Freiburg, Germany, and School of Chemistry, University of Leeds, Leeds LS2 9JT, U.K
| | - J. Sassmannshausen
- Freiburger Materialforschungszentrum (F M F) and Institut für Makromolekulare Chemie, Albert-Ludwigs-Universität, Stefan-Meier-Strasse 21 and 31, D-79104 Freiburg, Germany, and School of Chemistry, University of Leeds, Leeds LS2 9JT, U.K
| | - M. Bochmann
- Freiburger Materialforschungszentrum (F M F) and Institut für Makromolekulare Chemie, Albert-Ludwigs-Universität, Stefan-Meier-Strasse 21 and 31, D-79104 Freiburg, Germany, and School of Chemistry, University of Leeds, Leeds LS2 9JT, U.K
| | - R. Mülhaupt
- Freiburger Materialforschungszentrum (F M F) and Institut für Makromolekulare Chemie, Albert-Ludwigs-Universität, Stefan-Meier-Strasse 21 and 31, D-79104 Freiburg, Germany, and School of Chemistry, University of Leeds, Leeds LS2 9JT, U.K
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Kulkarni M, Mashelkar R. A unified approach to transport phenomena in polymeric media—I Diffusion in polymeric solutions, gels and melts. Chem Eng Sci 1983. [DOI: 10.1016/0009-2509(83)80014-1] [Citation(s) in RCA: 27] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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