1
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Mineart KP, Vallely MJ, Rankin LA, Hill DM, Lee B. Implications of styrenic triblock copolymer gel mechanics on midblock bridging fraction. POLYMER 2022. [DOI: 10.1016/j.polymer.2022.125394] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
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2
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Badani Prado RM, Mishra S, Ahmed H, Burghardt WR, Kundu S. Temperature- and strain-dependent transient microstructure and rheological responses of endblock-associated triblock gels of different block lengths in a midblock selective solvent. SOFT MATTER 2022; 18:7020-7034. [PMID: 36070440 DOI: 10.1039/d2sm00567k] [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
Endblock associative ABA gels in midblock selective solvents are attractive due to their easily tunable mechanical properties. Here, we present the effects of A- and B-block lengths on the rheological properties and microstructure of ABA gels by considering three low and one high polymer concentrations. The triblock polymer considered is poly(methyl methacrylate)-poly(n-butyl acrylate)-poly(methyl methacrylate) [PMMA-PnBA-PMMA] and the midblock solvent is 2-ethyl-1-hexanol. The gelation temperature has been found to be strongly dependent on the B-block (PnBA) length, as longer B-blocks facilitate network formation resulting in higher gelation temperature even with lower polymer chain density. Longer A-blocks (PMMA chains) make the endblock association stronger and significantly increase the relaxation time of gels. Temperature-dependent microstructure evolution for the gels with high polymer concentration reveals that the gel microstructure does not change significantly after the gel formation takes place. The dynamic change of microstructure in an applied strain cycle was captured using RheoSAXS experiments. The microstructure orients with the applied strain and the process is reversible in nature, indicating no significant A-block pullout. Our results provide new understandings regarding the temperature and strain-dependent microstructural change of ABA gels in midblock selective solvents.
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Affiliation(s)
- Rosa Maria Badani Prado
- Dave C. Swalm School of Chemical Engineering, 323 Presidents Circle, Mississippi State University, Mississippi State, MS 39762, USA.
| | - Satish Mishra
- Dave C. Swalm School of Chemical Engineering, 323 Presidents Circle, Mississippi State University, Mississippi State, MS 39762, USA.
| | - Humayun Ahmed
- Dave C. Swalm School of Chemical Engineering, 323 Presidents Circle, Mississippi State University, Mississippi State, MS 39762, USA.
| | - Wesley R Burghardt
- Department of Chemical Engineering, Northwestern University, Evanston, IL, USA
| | - Santanu Kundu
- Dave C. Swalm School of Chemical Engineering, 323 Presidents Circle, Mississippi State University, Mississippi State, MS 39762, USA.
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3
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Abstract
Ion-containing polymers have continued to be an important research focus for several decades due to their use as an electrolyte in energy storage and conversion devices. Elucidation of connections between the mesoscopic structure and multiscale dynamics of the ions and solvent remains incompletely understood. Coarse-grained modeling provides an efficient approach for exploring the structural and dynamical properties of these soft materials. The unique physicochemical properties of such polymers are of broad interest. In this review, we summarize the current development and understanding of the structure-property relationship of ion-containing polymers and provide insights into the design of such materials determined from coarse-grained modeling and simulations accompanying significant advances in experimental strategies. We specifically concentrate on three types of ion-containing polymers: proton exchange membranes (PEMs), anion exchange membranes (AEMs), and polymerized ionic liquids (polyILs). We posit that insight into the similarities and differences in these materials will lead to guidance in the rational design of high-performance novel materials with improved properties for various power source technologies.
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Affiliation(s)
- Zhenghao Zhu
- Department of Chemical & Biomolecular Engineering, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Xubo Luo
- Department of Chemical & Biomolecular Engineering, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Stephen J Paddison
- Department of Chemical & Biomolecular Engineering, University of Tennessee, Knoxville, Tennessee 37996, United States
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4
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Prado RMB, Mishra S, Ahmad H, Burghardt WR, Kundu S. Capturing the Transient Microstructure of a Physically Assembled Gel Subjected to Temperature and Large Deformation. Macromolecules 2021. [DOI: 10.1021/acs.macromol.1c00895] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Rosa Maria Badani Prado
- Dave C. Swalm School of Chemical Engineering, Mississippi State University, Mississippi State, Mississippi 39762, United States
| | - Satish Mishra
- Dave C. Swalm School of Chemical Engineering, Mississippi State University, Mississippi State, Mississippi 39762, United States
| | - Humayun Ahmad
- Dave C. Swalm School of Chemical Engineering, Mississippi State University, Mississippi State, Mississippi 39762, United States
| | - Wesley R. Burghardt
- Department of Chemical Engineering, Northwestern University, Evanston, Illinois 60208, United States
| | - Santanu Kundu
- Dave C. Swalm School of Chemical Engineering, Mississippi State University, Mississippi State, Mississippi 39762, United States
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5
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Mulchandani N, Masutani K, Kumar S, Yamane H, Sakurai S, Kimura Y, Katiyar V. Toughened PLA-b-PCL-b-PLA triblock copolymer based biomaterials: effect of self-assembled nanostructure and stereocomplexation on the mechanical properties. Polym Chem 2021. [DOI: 10.1039/d1py00429h] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The current research unfolds the effect of block lengths, microdomain morphology and stereocomplexation on the mechanical properties of PLA-b-PCL-b-PLA triblock copolymers where PCL is involved to improve the poor extensibility of PLA.
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Affiliation(s)
- Neha Mulchandani
- Department of Chemical Engineering
- Indian Institute of Technology Guwahati
- North Guwahati 781-039
- India
| | - Kazunari Masutani
- Department of Biobased Materials Science
- Kyoto Institute of Technology
- Kyoto 606-8585
- Japan
| | - Sachin Kumar
- Department of Bioscience and Bioengineering
- Indian Institute of Technology Guwahati
- North Guwahati 781-039
- India
| | - Hideki Yamane
- Department of Biobased Materials Science
- Kyoto Institute of Technology
- Kyoto 606-8585
- Japan
| | - Shinichi Sakurai
- Department of Chemical Engineering
- Indian Institute of Technology Guwahati
- North Guwahati 781-039
- India
- Department of Biobased Materials Science
| | - Yoshiharu Kimura
- Department of Biobased Materials Science
- Kyoto Institute of Technology
- Kyoto 606-8585
- Japan
| | - Vimal Katiyar
- Department of Chemical Engineering
- Indian Institute of Technology Guwahati
- North Guwahati 781-039
- India
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6
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Athir N, Shi L, Shah SAA, Zhang Z, Cheng J, Liu J, Zhang J. Molecular dynamics simulation of thermo-mechanical behaviour of elastomer cross-linked via multifunctional zwitterions. Phys Chem Chem Phys 2019; 21:21615-21625. [DOI: 10.1039/c9cp03221e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Coarse-grained (CG) molecular dynamics simulations have been employed to study the thermo-mechanical response of a physically cross-linked network composed of zwitterionic moieties and fully flexible elastomeric polymer chains.
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Affiliation(s)
- Naveed Athir
- Key Laboratory of Carbon Fiber and Functional Polymers
- Beijing University of Chemical Technology
- Ministry of Education
- Beijing
- P. R. China
| | - Ling Shi
- Key Laboratory of Carbon Fiber and Functional Polymers
- Beijing University of Chemical Technology
- Ministry of Education
- Beijing
- P. R. China
| | - Sayyed Asim Ali Shah
- Key Laboratory of Carbon Fiber and Functional Polymers
- Beijing University of Chemical Technology
- Ministry of Education
- Beijing
- P. R. China
| | - Zhiyu Zhang
- Beijing Engineering Research Center of Advanced Elastomers
- Beijing University of Chemical Technology
- People's Republic of China
| | - Jue Cheng
- Key Laboratory of Carbon Fiber and Functional Polymers
- Beijing University of Chemical Technology
- Ministry of Education
- Beijing
- P. R. China
| | - Jun Liu
- Beijing Engineering Research Center of Advanced Elastomers
- Beijing University of Chemical Technology
- People's Republic of China
| | - Junying Zhang
- Key Laboratory of Carbon Fiber and Functional Polymers
- Beijing University of Chemical Technology
- Ministry of Education
- Beijing
- P. R. China
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7
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Hagita K, Murashima T, Iwaoka N. Thinning Approximation for Calculating Two-Dimensional Scattering Patterns in Dissipative Particle Dynamics Simulations under Shear Flow. Polymers (Basel) 2018; 10:E1224. [PMID: 30961149 PMCID: PMC6290630 DOI: 10.3390/polym10111224] [Citation(s) in RCA: 4] [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: 10/05/2018] [Revised: 10/26/2018] [Accepted: 11/01/2018] [Indexed: 11/16/2022] Open
Abstract
Modifications to improve thinning approximation (TA) were considered in order to calculate two-dimensional scattering patterns (2DSPs) for dissipative particle dynamics (DPD) simulations of polymer melts under a shear flow. We proposed multipoint TA and adaptive TA because the bond lengths in DPD chains vary widely when compared to those in Kremer⁻Grest (KG) chains, and the effectiveness of these two types of TA for the two major DPD parameter sets were investigated. In this paper, we report our findings on the original DPD model with soft bonds and that with rigid bonds. Based on the behavior of the 2DSPs and the distribution of orientations of the bond vectors, two spot patterns originating from the oriented chain correlations were observed when distinct distributions of the highly oriented bond vectors in the shear direction were obtained. For multipoint TA, we concluded that at least two additional midpoints ( n mid ≥ 2 ) are required to clearly observe the two spot patterns. For adaptive TA, a dividing distance of l ATA ≤ 0.4 is sufficient for clear observation, which is consistent with the requirement of n mid ≥ 2 for multipoint TA.
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Affiliation(s)
- Katsumi Hagita
- Department of Applied Physics, National Defense Academy, Yokosuka 239-8686, Japan.
| | | | - Nobuyuki Iwaoka
- Department of Creative Engineering, Tsuruoka College, National Institute of Technology, Yamagata 997-8511, Japan.
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8
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Mishra S, Badani Prado RM, Lacy TE, Kundu S. Investigation of failure behavior of a thermoplastic elastomer gel. SOFT MATTER 2018; 14:7958-7969. [PMID: 30113614 DOI: 10.1039/c8sm01397g] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Gels are increasingly being used in many applications, and it is important to understand how these gels fail subjected to mechanical deformation. Here, we investigate the failure behavior of a thermoplastic elastomer gel (TPEG) consisting of poly(styrene)-poly(isoprene)-poly(styrene) in mineral oil, in tensile mode, under constant stress, and in fracture tests, where the fracture initiates from a predefined crack. In these gels, the poly(styrene) endblocks associate to form spherical aggregates, as captured using SAXS. Shear-rheology experiments indicate that the poly(isoprene) midblocks connecting these aggregates are loosely entangled. The relaxation behavior of these gels has been captured by time-temperature superposition of frequency sweep data and stress-relaxation experiments. The relaxation process in these gels involves endblock pullout from the aggregates and subsequent relaxation of the chains. An unfavorable enthalpic interaction between the endblock and mineral oil results in a significantly large relaxation time. These gels display rate dependent mechanical properties, likely due to the midblock entanglements. Fracture and creep failure tests provide insights into the gel failure mechanism. Creep experiments indicate that these gels fail by a thermally activated process. Fracture experiments capture the energy release rate as a function of crack-tip velocity. The critical energy release rate is estimated by incorporating the friction force the polystyrene chains are subjected to, as those are pulled out of aggregates, and the enthalpic cost to overcome unfavorable interaction between poly(styrene) and mineral oil. Our results provide further insights to the failure behavior of the self-assembled TPEGs.
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Affiliation(s)
- Satish Mishra
- Dave C. Swalm School of Chemical Engineering, Mississippi State University, MS State, MS 39762, USA.
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9
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Mesoscale modeling of sulfonated polyimides copolymer membranes: Effect of sequence distributions. J Memb Sci 2018. [DOI: 10.1016/j.memsci.2018.07.008] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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10
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Alex A, Ilango NK, Ghosh P. Comparative Role of Chain Scission and Solvation in the Biodegradation of Polylactic Acid (PLA). J Phys Chem B 2018; 122:9516-9526. [DOI: 10.1021/acs.jpcb.8b07930] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Aleena Alex
- Nanomechanics and Nanomaterials Laboratory, Indian Institute of Technology Madras, Chennai-600036, Tamil Nadu, India
| | - Nirrupama Kamala Ilango
- Nanomechanics and Nanomaterials Laboratory, Indian Institute of Technology Madras, Chennai-600036, Tamil Nadu, India
| | - Pijush Ghosh
- Nanomechanics and Nanomaterials Laboratory, Indian Institute of Technology Madras, Chennai-600036, Tamil Nadu, India
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11
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Iwaoka N, Hagita K, Takano H. Multipoint segmental repulsive potential for entangled polymer simulations with dissipative particle dynamics. J Chem Phys 2018; 149:114901. [PMID: 30243288 DOI: 10.1063/1.5046755] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
A model is developed for simulating entangled polymers by dissipative particle dynamics (DPD) using the segmental repulsive potential (SRP). In contrast to previous SRP models that define a single-point interaction on each bond, the proposed SRP model applies a dynamically adjustable multipoint on the bond. Previous SRP models could not reproduce the equilibrium properties of Groot and Warren's original DPD model [R. D. Groot and P. B. Warren, J. Chem. Phys. 107, 4423 (1997)] because the introduction of a single SRP induces a large excluded volume, whereas, the proposed multipoint SRP (MP-SRP) introduces a cylindrical effective excluded bond volume. We demonstrate that our MP-SRP model exhibits equilibrium properties similar to those of the original DPD polymers. The MP-SRP model parameters are determined by monitoring the number of topology violations, thermodynamic properties, and the polymer internal structure. We examine two typical DPD polymers with different bond-length distributions; one of them was used in the modified SRP model by Sirk et al. [J. Chem. Phys. 136, 134903 (2012)], whereas the other was used in the original DPD model. We demonstrate that for both polymers, the proposed MP-SRP model captures the entangled behaviors of a polymer melt naturally, by calculating the slowest relaxation time of a chain in the melt and the shear relaxation modulus. The results indicate that the proposed MP-SRP model can be applied to a variety of DPD polymers.
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Affiliation(s)
- Nobuyuki Iwaoka
- Department of Creative Engineering, Tsuruoka College, National Institute of Technology, 104 Sawada, Inooka, Tsuruoka, Yamagata 997-8511, Japan
| | - Katsumi Hagita
- Department of Applied Physics, National Defense Academy, 1-10-20, Hashirimizu, Yokosuka 239-8686, Japan
| | - Hiroshi Takano
- Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
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12
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Ketkaew R, Tantirungrotechai Y. Dissipative Particle Dynamics Study of SWCNT Reinforced Natural Rubber Composite System: An Important Role of Self-Avoiding Model on Mechanical Properties. MACROMOL THEOR SIMUL 2018. [DOI: 10.1002/mats.201700093] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Rangsiman Ketkaew
- Computational Chemistry Research Unit; Department of Chemistry; Faculty of Science and Technology; Thammasat University; Pathum Thani 12120 Thailand
| | - Yuthana Tantirungrotechai
- Computational Chemistry Research Unit; Department of Chemistry; Faculty of Science and Technology; Thammasat University; Pathum Thani 12120 Thailand
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13
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Parker AJ, Rottler J. Nonlinear Mechanics of Triblock Copolymer Elastomers: From Molecular Simulations to Network Models. ACS Macro Lett 2017. [DOI: 10.1021/acsmacrolett.7b00369] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Amanda J. Parker
- Department
of Physics and Astronomy, University of British Columbia, 6224
Agricultural Road, Vancouver, British Columbia V6T 1Z1, Canada
- Quantum
Matter Institute, University of British Columbia, Vancouver, British Columbia V6T 1Z4, Canada
| | - Jörg Rottler
- Department
of Physics and Astronomy, University of British Columbia, 6224
Agricultural Road, Vancouver, British Columbia V6T 1Z1, Canada
- Quantum
Matter Institute, University of British Columbia, Vancouver, British Columbia V6T 1Z4, Canada
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14
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Mineart KP, Dickerson JD, Love DM, Lee B, Zuo X, Spontak RJ. Hydrothermal Conditioning of Physical Hydrogels Prepared from a Midblock‐Sulfonated Multiblock Copolymer. Macromol Rapid Commun 2017; 38. [DOI: 10.1002/marc.201600666] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2016] [Revised: 11/11/2016] [Indexed: 11/09/2022]
Affiliation(s)
- Kenneth P. Mineart
- Department of Chemical & Biomolecular Engineering North Carolina State University Raleigh NC 27695 USA
| | - Joshua D. Dickerson
- Department of Materials Science & Engineering North Carolina State University Raleigh NC 27695 USA
| | - Dillon M. Love
- Department of Chemical & Biomolecular Engineering North Carolina State University Raleigh NC 27695 USA
| | - Byeongdu Lee
- X‐ray Science Division Advanced Photon Source Argonne National Laboratory Argonne IL 60439 USA
| | - Xiaobing Zuo
- X‐ray Science Division Advanced Photon Source Argonne National Laboratory Argonne IL 60439 USA
| | - Richard J. Spontak
- Department of Chemical & Biomolecular Engineering North Carolina State University Raleigh NC 27695 USA
- Department of Materials Science & Engineering North Carolina State University Raleigh NC 27695 USA
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15
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Peters AJ, Lodge TP. Comparison of Gel Relaxation Times and End-Block Pullout Times in ABA Triblock Copolymer Networks. Macromolecules 2016. [DOI: 10.1021/acs.macromol.6b01921] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Andrew J. Peters
- Department of Chemistry and ‡Department of
Chemical Engineering and Materials
Science, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Timothy P. Lodge
- Department of Chemistry and ‡Department of
Chemical Engineering and Materials
Science, University of Minnesota, Minneapolis, Minnesota 55455, United States
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16
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Zheng Z, Liu H, Shen J, Liu J, Wu Y, Zhang L. Tailoring the Static and Dynamic Mechanical Properties of Tri-Block Copolymers through Molecular Dynamics Simulation. Polymers (Basel) 2016; 8:E335. [PMID: 30974618 PMCID: PMC6432360 DOI: 10.3390/polym8090335] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2016] [Revised: 08/22/2016] [Accepted: 08/31/2016] [Indexed: 11/16/2022] Open
Abstract
Although the research of the self-assembly of tri-block copolymers has been carried out widely, little attention has been paid to study the mechanical properties and to establish its structure-property relation, which is of utmost significance for its practical applications. Here, we adopt molecular dynamics simulation to study the static and dynamic mechanical properties of the ABA tri-block copolymer, by systematically varying the morphology, the interaction strength between A-A blocks, the temperature, the dynamic shear amplitude and frequency. In our simulation, we set the self-assembled structure formed by A-blocks to be in the glassy state, with the B-blocks in the rubbery state. With the increase of the content of A-blocks, the spherical, cylindrical and lamellar domains are formed, respectively, exhibiting a gradual increase of the stress-strain behavior. During the self-assembly process, the stress-strain curve is as well enhanced. The increase of the interaction strength between A-A blocks improves the stress-strain behavior and reduces the dynamic hysteresis loss. Since the cylindrical domains are randomly dispersed, the stress-strain behavior exhibits the isotropic mechanical property; while for the lamellar domains, the mechanical property seems to be better along the direction perpendicular to than parallel to the lamellar direction. In addition, we observe that with the increase of the dynamic shear amplitude and frequency, the self-assembled domains become broken up, resulting in the decrease of the storage modulus and the increase of the hysteresis loss, which holds the same conclusion for the increase of the temperature. Our work provides some valuable guidance to tune the static and dynamic mechanical properties of ABA tri-block copolymer in the field of various applications.
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Affiliation(s)
- Zijian Zheng
- Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials, Beijing University of Chemical Technology, 100029 Beijing, China.
- Beijing Engineering Research Center of Advanced Elastomers, Beijing University of Chemical Technology, 100029 Beijing, China.
| | - Hongji Liu
- Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials, Beijing University of Chemical Technology, 100029 Beijing, China.
- Beijing Engineering Research Center of Advanced Elastomers, Beijing University of Chemical Technology, 100029 Beijing, China.
| | - Jianxiang Shen
- College of Materials and Textile Engineering, Jiaxing University, 314001 Jiaxing, China.
| | - Jun Liu
- Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials, Beijing University of Chemical Technology, 100029 Beijing, China.
- Beijing Engineering Research Center of Advanced Elastomers, Beijing University of Chemical Technology, 100029 Beijing, China.
- Engineering Research Center of Elastomer Materials on Energy Conservation and Resources, Beijing University of Chemical Technology, Ministry of Education, 100029 Beijing, China.
| | - Youping Wu
- Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials, Beijing University of Chemical Technology, 100029 Beijing, China.
- Beijing Engineering Research Center of Advanced Elastomers, Beijing University of Chemical Technology, 100029 Beijing, China.
- Engineering Research Center of Elastomer Materials on Energy Conservation and Resources, Beijing University of Chemical Technology, Ministry of Education, 100029 Beijing, China.
| | - Liqun Zhang
- Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials, Beijing University of Chemical Technology, 100029 Beijing, China.
- Beijing Engineering Research Center of Advanced Elastomers, Beijing University of Chemical Technology, 100029 Beijing, China.
- Engineering Research Center of Elastomer Materials on Energy Conservation and Resources, Beijing University of Chemical Technology, Ministry of Education, 100029 Beijing, China.
- State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, 100029 Beijing, China.
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17
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Sliozberg YR, Kröger M, Chantawansri TL. Fast equilibration protocol for million atom systems of highly entangled linear polyethylene chains. J Chem Phys 2016; 144:154901. [DOI: 10.1063/1.4946802] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Yelena R. Sliozberg
- U.S. Army Research Laboratory, Aberdeen Proving Ground, Maryland 21005, USA
- TKC Global, Inc., Aberdeen Proving Ground, Maryland 21005, USA
| | - Martin Kröger
- Polymer Physics, Department of Materials, ETH Zürich, Leopold-Ruzicka-Weg 4, CH-8093 Zürich, Switzerland
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18
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Li S, Chen J, Xu D, Shi T. Topological constraints of network chains in telechelic associative polymer gels. J Chem Phys 2015; 143:244902. [DOI: 10.1063/1.4938233] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Sijia Li
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Jilin, Changchun 130022, People’s Republic of China
| | - Jizhong Chen
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Jilin, Changchun 130022, People’s Republic of China
| | - Donghua Xu
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Jilin, Changchun 130022, People’s Republic of China
| | - Tongfei Shi
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Jilin, Changchun 130022, People’s Republic of China
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19
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Parker AJ, Rottler J. Molecular Mechanisms of Plastic Deformation in Sphere-Forming Thermoplastic Elastomers. Macromolecules 2015. [DOI: 10.1021/acs.macromol.5b01339] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Amanda J. Parker
- Department of Physics and
Astronomy, University of British Columbia, 6224 Agricultural Road, Vancouver, BC V6T 1Z1, Canada
| | - Jörg Rottler
- Department of Physics and
Astronomy, University of British Columbia, 6224 Agricultural Road, Vancouver, BC V6T 1Z1, Canada
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20
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Mineart KP, Jiang X, Jinnai H, Takahara A, Spontak RJ. Morphological investigation of midblock-sulfonated block ionomers prepared from solvents differing in polarity. Macromol Rapid Commun 2014; 36:432-8. [PMID: 25537368 DOI: 10.1002/marc.201400627] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2014] [Revised: 12/01/2014] [Indexed: 11/06/2022]
Abstract
Recent developments regarding charged multiblock copolymers that can form physical networks and exhibit robust mechanical properties herald new and exciting opportunities for contemporary technologies requiring amphiphilic attributes. Due to the presence of strong interactions, however, control over the phase behavior of such materials remains challenging, especially since their morphologies can be solvent-templated. In this study, transmission electron microscopy and microtomography are employed to examine the morphological characteristics of midblock-sulfonated pentablock ionomers prepared from solvents differing in polarity. Resultant images confirm that discrete, spherical ion-rich microdomains form in films cast from a relatively nonpolar solvent, whereas an apparently mixed morphology with a continuous ion-rich pathway is generated when the casting solvent is more highly polar. Detailed 3D analysis of the morphological characteristics confirms the coexistence of hexagonally-packed nonpolar cylinders and lamellae, which facilitates the diffusion of ions and/or other polar species through the nanostructured medium.
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Affiliation(s)
- Kenneth P Mineart
- Department of Chemical & Biomolecular Engineering, North Carolina State University, Raleigh, NC, 27695, USA
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