1
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Zhao Y, Ma Y, Xiong Y, Qin T, Zhu Y, Deng H, Qin J, Shi X, Zhang G. Chemically crosslinked crystalline thermoplastic polyolefin elastomer with good elasticity and improved thermo-mechanical properties. POLYMER 2022. [DOI: 10.1016/j.polymer.2022.125075] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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2
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Blankenship JR, Levi AE, Goldfeld DJ, Self JL, Alizadeh N, Chen D, Fredrickson GH, Bates CM. Asymmetric Miktoarm Star Polymers as Polyester Thermoplastic Elastomers. Macromolecules 2022. [DOI: 10.1021/acs.macromol.2c00214] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jacob R. Blankenship
- Department of Chemistry & Biochemistry, University of California, Santa Barbara, California 93106, United States
- Materials Research Laboratory, University of California, Santa Barbara, California 93106, United States
| | - Adam E. Levi
- Department of Chemistry & Biochemistry, University of California, Santa Barbara, California 93106, United States
- Materials Research Laboratory, University of California, Santa Barbara, California 93106, United States
| | - David J. Goldfeld
- Department of Chemistry & Biochemistry, University of California, Santa Barbara, California 93106, United States
- Materials Research Laboratory, University of California, Santa Barbara, California 93106, United States
| | - Jeffrey L. Self
- Department of Chemistry & Biochemistry, University of California, Santa Barbara, California 93106, United States
| | - Nima Alizadeh
- Materials Department, University of California, Santa Barbara, California 93106, United States
| | - Duyu Chen
- Materials Research Laboratory, University of California, Santa Barbara, California 93106, United States
| | - Glenn H. Fredrickson
- Materials Department, University of California, Santa Barbara, California 93106, United States
- Materials Research Laboratory, University of California, Santa Barbara, California 93106, United States
- Department of Chemical Engineering, University of California, Santa Barbara, California 93106, United States
| | - Christopher M. Bates
- Department of Chemistry & Biochemistry, University of California, Santa Barbara, California 93106, United States
- Materials Department, University of California, Santa Barbara, California 93106, United States
- Materials Research Laboratory, University of California, Santa Barbara, California 93106, United States
- Department of Chemical Engineering, University of California, Santa Barbara, California 93106, United States
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3
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Xiang N, Zhang X, Zheng M, Xu R, Yan Y. Investigation of tensile behavior and molecular structure of the thermoplastic polyurethane sheets injection molded at different mold temperatures. J Appl Polym Sci 2021. [DOI: 10.1002/app.50959] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Ning Xiang
- Beijing Institute of Aeronautical Materials AECC, Beijing Engineering Research Centre of Advanced Structural Transparencies for the Modern Traffic System Beijing China
| | - Xiaowen Zhang
- Beijing Institute of Aeronautical Materials AECC, Beijing Engineering Research Centre of Advanced Structural Transparencies for the Modern Traffic System Beijing China
| | - Mengyao Zheng
- Beijing Institute of Aeronautical Materials AECC, Beijing Engineering Research Centre of Advanced Structural Transparencies for the Modern Traffic System Beijing China
| | - Ruijie Xu
- Guangdong Provincial Key Laboratory of Functional Soft Condensed Matter, Guangdong Provincial Engineering Laboratory of Energy Storage Materials and Devices, School of Materials and Energy Guangdong University of Technology Guangzhou China
| | - Yue Yan
- Beijing Institute of Aeronautical Materials AECC, Beijing Engineering Research Centre of Advanced Structural Transparencies for the Modern Traffic System Beijing China
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4
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Xiang N, Zhang X, Zheng M, Ge Y, Wang T, Liu H, Maharaj C, Dear JP, Yan Y. Microstructure and tensile properties of injection molded thermoplastic polyurethane with different melt temperatures. J Appl Polym Sci 2020. [DOI: 10.1002/app.48891] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Ning Xiang
- Beijing Institute of Aeronautical Materials, AECCBeijing Engineering Research Centre of Advanced Structural Transparencies for the Modern Traffic System Beijing 100095 China
| | - Xiaowen Zhang
- Beijing Institute of Aeronautical Materials, AECCBeijing Engineering Research Centre of Advanced Structural Transparencies for the Modern Traffic System Beijing 100095 China
| | - Mengyao Zheng
- Beijing Institute of Aeronautical Materials, AECCBeijing Engineering Research Centre of Advanced Structural Transparencies for the Modern Traffic System Beijing 100095 China
| | - Yong Ge
- Beijing Institute of Aeronautical Materials, AECCBeijing Engineering Research Centre of Advanced Structural Transparencies for the Modern Traffic System Beijing 100095 China
| | - Tao Wang
- Beijing Institute of Aeronautical Materials, AECCBeijing Engineering Research Centre of Advanced Structural Transparencies for the Modern Traffic System Beijing 100095 China
| | - Haibao Liu
- Department of Mechanical EngineeringImperial College London London SW7 2AZ United Kingdom
| | - Chris Maharaj
- Department of Mechanical and Manufacturing EngineeringThe University of the West Indies St. Augustine Trinidad and Tobago
| | - John P. Dear
- Department of Mechanical EngineeringImperial College London London SW7 2AZ United Kingdom
| | - Yue Yan
- Beijing Institute of Aeronautical Materials, AECCBeijing Engineering Research Centre of Advanced Structural Transparencies for the Modern Traffic System Beijing 100095 China
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5
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Wang H, Ma Z, Liu J, Shi Q, Yin J. Reduction of thrombotic and inflammatory complications of polystyrene-block-polyisoprene-block-polystyrene (SIS) with one-step electrospinning. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2019; 31:642-657. [PMID: 31860378 DOI: 10.1080/09205063.2019.1707943] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Polystyrene-block-polyisoprene-block-polystyrene (SIS) has been used as biomaterials due to its soft and stable properties under physiological conditions. However, the thrombotic and inflammatory complications caused by SIS restrain its application as blood-contacting implant. To overcome this problem, the hydrophilic core-shell structured SIS-based microfiber with antioxidant encapsulation is fabricated with one-step reactive electrospinning. We demonstrate that the phase separation of SIS and acylated Pluronic F127 (F127-DA) components and crosslinking during electrospinning renders the microfiber blood compatible and stable under physiological condition; the encapsulation of 2-O-d-glucopyranosyl-l-ascorbic acid (AA-2G) in microfiber and subsequent release of AA-2G detoxifies the excess reactive oxygen species (ROS). The microfibers are nontoxic to cells and promote the fast growth and proliferation of human umbilical vein endothelial cells (HUVECs) in the presence of ROS; the thrombotic and inflammatory complications are effectively reduced with implant evaluation in vivo. Therefore, our work paves a new way to improve the biocompatibility of SIS, making it a promising candidate for blood contact materials.
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Affiliation(s)
- Haozheng Wang
- Key Laboratory of Functional Polymer Materials and State Key Laboratory of Medicinal Chemical Biology, Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin, China
| | - Zhifang Ma
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, China
| | - Jingchuan Liu
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, China
| | - Qiang Shi
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, China
| | - Jinghua Yin
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, China
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6
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Watts A, Hillmyer MA. Aliphatic Polyester Thermoplastic Elastomers Containing Hydrogen-Bonding Ureidopyrimidinone Endgroups. Biomacromolecules 2019; 20:2598-2609. [PMID: 31241922 DOI: 10.1021/acs.biomac.9b00411] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Polylactide- block-poly(γ-methyl-ε-caprolactone)- block-polylactide (LML) is a sustainable thermoplastic elastomer (TPE) candidate that exhibits competitive mechanical properties as compared to traditional styrenic TPEs. The relatively low glass transition temperature of the polylactide endblocks, however, results in stress relaxation and low levels of elastic recovery. We report the synthesis and characterization of poly(γ-methyl-ε-caprolactone) (PMCL) and LML end-functionalized with ureidopyrimidinone (UPy) hydrogen-bonding moieties to improve the elastic performance of these polymers. Although UPy-functionalized PMCL shows dynamical mechanical behavior that is distinct from the unfunctionalized homopolymer, it does not exhibit elastomeric behavior at room temperature. The addition of UPy endgroups to LML increases the ultimate tensile strength, elongation at break, and tensile toughness compared to unfunctionalized LML. Stress relaxation studies at a fixed strain show reduced levels of stress relaxation in LML with UPy endgroups. The stress relaxation was further reduced by including semicrystalline poly(( S, S)-lactide) as endblocks with UPy endgroups.
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Affiliation(s)
- Annabelle Watts
- Department of Chemistry , University of Minnesota , Minneapolis , Minnesota 55455-0431 , United States
| | - Marc A Hillmyer
- Department of Chemistry , University of Minnesota , Minneapolis , Minnesota 55455-0431 , United States
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7
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Chang J, Lin Y, Chen W, Tian F, Chen P, Zhao J, Li L. Structural origin for the strain rate dependence of mechanical response of fluoroelastomer F2314. ACTA ACUST UNITED AC 2019. [DOI: 10.1002/polb.24817] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Jiarui Chang
- National Synchrotron Radiation Laboratory, CAS Key Laboratory of Soft Matter Chemistry, Anhui Provincial Engineering Laboratory of Advanced Functional Polymer FilmUniversity of Science and Technology of China Hefei 230026 China
| | - Yuanfei Lin
- National Synchrotron Radiation Laboratory, CAS Key Laboratory of Soft Matter Chemistry, Anhui Provincial Engineering Laboratory of Advanced Functional Polymer FilmUniversity of Science and Technology of China Hefei 230026 China
- South China Advanced Institute for Soft Matter Science and TechnologySouth China University of Technology Guangzhou 510640 China
| | - Wei Chen
- National Synchrotron Radiation Laboratory, CAS Key Laboratory of Soft Matter Chemistry, Anhui Provincial Engineering Laboratory of Advanced Functional Polymer FilmUniversity of Science and Technology of China Hefei 230026 China
| | - Fucheng Tian
- National Synchrotron Radiation Laboratory, CAS Key Laboratory of Soft Matter Chemistry, Anhui Provincial Engineering Laboratory of Advanced Functional Polymer FilmUniversity of Science and Technology of China Hefei 230026 China
| | - Pinzhang Chen
- National Synchrotron Radiation Laboratory, CAS Key Laboratory of Soft Matter Chemistry, Anhui Provincial Engineering Laboratory of Advanced Functional Polymer FilmUniversity of Science and Technology of China Hefei 230026 China
| | - Jingyun Zhao
- National Synchrotron Radiation Laboratory, CAS Key Laboratory of Soft Matter Chemistry, Anhui Provincial Engineering Laboratory of Advanced Functional Polymer FilmUniversity of Science and Technology of China Hefei 230026 China
| | - Liangbin Li
- National Synchrotron Radiation Laboratory, CAS Key Laboratory of Soft Matter Chemistry, Anhui Provincial Engineering Laboratory of Advanced Functional Polymer FilmUniversity of Science and Technology of China Hefei 230026 China
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8
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Zhao JK, Yang GW, Zhu XF, Wu GP. Highly elastic and degradable thermoset elastomers from CO 2-based polycarbonates and bioderived polyesters. Polym Chem 2019. [DOI: 10.1039/c9py01085h] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
The first example of CO2-based thermoset elastomers (CO2Es) on the basis of two sustainable and degradable polymers, rigid CO2-based polycarbonates and soft polyesters, is reported.
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Affiliation(s)
- Jin-Kai Zhao
- MOE Laboratory of Macromolecular Synthesis and Functionalization
- Key Laboratory of Adsorption and Separation Materials & Technologies of Zhejiang Province
- Department of Polymer Science and Engineering
- Zhejiang University
- Hangzhou 310027
| | - Guan-Wen Yang
- MOE Laboratory of Macromolecular Synthesis and Functionalization
- Key Laboratory of Adsorption and Separation Materials & Technologies of Zhejiang Province
- Department of Polymer Science and Engineering
- Zhejiang University
- Hangzhou 310027
| | - Xiao-Feng Zhu
- MOE Laboratory of Macromolecular Synthesis and Functionalization
- Key Laboratory of Adsorption and Separation Materials & Technologies of Zhejiang Province
- Department of Polymer Science and Engineering
- Zhejiang University
- Hangzhou 310027
| | - Guang-Peng Wu
- MOE Laboratory of Macromolecular Synthesis and Functionalization
- Key Laboratory of Adsorption and Separation Materials & Technologies of Zhejiang Province
- Department of Polymer Science and Engineering
- Zhejiang University
- Hangzhou 310027
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9
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Fang C, Wang X, Chen X, Wang Z. Mild synthesis of environment-friendly thermoplastic triblock copolymer elastomers through combination of ring-opening and RAFT polymerization. Polym Chem 2019. [DOI: 10.1039/c9py00654k] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Environment-friendly thermoplastic triblock copolymer elastomers, polylactide-block-polyisoprene-block-polylactide, were synthesized by a mild ROP and RAFT method.
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Affiliation(s)
- Chu Fang
- CAS Key Laboratory of Soft Matter Chemistry
- Department of Polymer Science and Engineering
- University of Science and Technology of China
- Hefei
- P. R. China
| | - Xuehui Wang
- CAS Key Laboratory of Soft Matter Chemistry
- Department of Polymer Science and Engineering
- University of Science and Technology of China
- Hefei
- P. R. China
| | - Xuesi Chen
- Key Laboratory of Polymer Ecomaterials
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun
- China
| | - Zhigang Wang
- CAS Key Laboratory of Soft Matter Chemistry
- Department of Polymer Science and Engineering
- University of Science and Technology of China
- Hefei
- P. R. China
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10
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Yu X, Wang X, Zhang A, Zhou T. Influence of processing conditions on mechanical properties of blends of styrenic block copolymer and poly(phenylene oxide): Miscibility and microdomain size. J Appl Polym Sci 2017. [DOI: 10.1002/app.46123] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Xiangtian Yu
- State Key Laboratory of Polymer Materials Engineering of China, Polymer Research Institute; Sichuan University; Chengdu 610065 China
| | - Xiang Wang
- State Key Laboratory of Polymer Materials Engineering of China, Polymer Research Institute; Sichuan University; Chengdu 610065 China
| | - Aiming Zhang
- State Key Laboratory of Polymer Materials Engineering of China, Polymer Research Institute; Sichuan University; Chengdu 610065 China
| | - Tao Zhou
- State Key Laboratory of Polymer Materials Engineering of China, Polymer Research Institute; Sichuan University; Chengdu 610065 China
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11
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Watts A, Kurokawa N, Hillmyer MA. Strong, Resilient, and Sustainable Aliphatic Polyester Thermoplastic Elastomers. Biomacromolecules 2017; 18:1845-1854. [PMID: 28467049 DOI: 10.1021/acs.biomac.7b00283] [Citation(s) in RCA: 110] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Thermoplastic elastomers (TPEs) composed of ABA block polymers exhibit a wide variety of properties and are easily processable as they contain physical, rather than chemical, cross-links. Poly(γ-methyl-ε-caprolactone) (PγMCL) is an amorphous polymer with a low entanglement molar mass (Me = 2.9 kg mol-1), making it a suitable choice for tough elastomers. Incorporating PγMCL as the midblock with polylactide (PLA) end blocks (fLA = 0.17) results in TPEs with high stresses and elongations at break (σB = 24 ± 2 MPa and εB = 1029 ± 20%, respectively) and low levels of hysteresis. The use of isotactic PLA as the end blocks (fLLA = 0.17) increases the strength and toughness of the material (σB = 30 ± 4 MPa, εB = 988 ± 30%) due to its semicrystalline nature. This study aims to demonstrate how the outstanding properties in these sustainable materials are a result of the entanglements, glass transition temperature, segment-segment interaction parameter, and crystallinity, resulting in comparable properties to the commercially relevant styrene-based TPEs.
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Affiliation(s)
- Annabelle Watts
- Department of Chemistry, University of Minnesota , Minneapolis, Minnesota 55455-0431, United States of America
| | - Naruki Kurokawa
- Department of Chemistry, University of Minnesota , Minneapolis, Minnesota 55455-0431, United States of America
| | - Marc A Hillmyer
- Department of Chemistry, University of Minnesota , Minneapolis, Minnesota 55455-0431, United States of America
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12
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Zhao Y, Si L, Wang L, Dang W, Bao J, Lu Z, Zhang M. Tuning the mechanical properties of weakly phase-separated olefin block copolymer by establishing co-crystallization structure with the aid of linear polyethylene: the dependence on molecular chain length. CrystEngComm 2017. [DOI: 10.1039/c7ce00653e] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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13
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Zhao Y, Zhu Y, Sui G, Chen F, Fu Q. Tailoring the crystalline morphology and mechanical property of olefin block copolymer via blending with a small amount of UHMWPE. POLYMER 2017. [DOI: 10.1016/j.polymer.2016.12.025] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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14
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Hendrich M, Lewerdomski L, Vana P. Biomimetic triblock and multiblock copolymers containing l
-Phenylalanine moieties showing healing and enhanced mechanical properties. ACTA ACUST UNITED AC 2015. [DOI: 10.1002/pola.27753] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Michael Hendrich
- Institut für Physikalische Chemie, Georg-August-Universität Göttingen; Tammannstr 6 D-37077 Göttingen Germany
| | - Lars Lewerdomski
- Institut für Physikalische Chemie, Georg-August-Universität Göttingen; Tammannstr 6 D-37077 Göttingen Germany
| | - Philipp Vana
- Institut für Physikalische Chemie, Georg-August-Universität Göttingen; Tammannstr 6 D-37077 Göttingen Germany
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15
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Property enhancement of PP-EPDM thermoplastic vulcanizates via shear-induced break-up of nano-rubber aggregates and molecular orientation of the matrix. POLYMER 2015. [DOI: 10.1016/j.polymer.2015.03.011] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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16
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Zhao Y, Su B, Chen F, Fu Q. Evolution of unique nano-cylindrical structure in poly(styrene-b-isoprene-b-styrene) prepared under "dynamic packing injection moulding". SOFT MATTER 2015; 11:2300-2307. [PMID: 25658968 DOI: 10.1039/c4sm02463j] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
This work reports the evolution of ordered nano-cylindrical structures in a thermoplastic elastomer, poly(styrene-b-isoprene-b-styrene) (SIS), utilizing a newly designed processing technique, so-called "dynamic-packing injection moulding". In this injection moulding technique, controlled oscillating shears with different shear cessation times under constant pressure were applied on the moulded samples during cooling. It was found that these additional controlled oscillating shears resulted in a change of orientation in skin-core structures in these samples, compared with corresponding "reference" samples processed via traditional injection moulding (without controlled oscillating shears). For the "reference" samples, a highly oriented PS cylindrical structure combined with relatively weak lateral ordering was observed in their skin layers, whereas the lateral ordering of the PS nano-cylinders gradually disappeared when entering the core region. On the other hand, for the SIS samples obtained via "dynamic-packing injection moulding", the orientation of the PS nano-cylinders in the skin layers was similar to the case of the "reference" sample due to their extremely fast cooling rate. However, the lateral ordering of these cylinders had been extended to the core region. With an increase in the cessation time, the lateral ordering of the PS nano-cylinders was further improved and finally resulted in hexagonal lateral packing along the flow direction in the mould. Furthermore, a mixture of parallel/perpendicular orientation of the cylinders relative to the flow direction was found, particularly when the cessation time was short (such as 3 s). We speculated that this specific perpendicular orientation was a transient state for development of a final parallel orientation aligned with the flow direction with increasing cessation time, accompanied by a further enhancement of the nano-cylindrical parallel orientation. This study could provide a better understanding of the shear and relaxation effects on the structural evolution of this class of thermoplastic elastomers, enhancing supramolecular ordered cylindrical orientation in the core region, and paving a way to tune the nano-structures of block copolymers via this new processing technique to achieve desired properties.
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Affiliation(s)
- Yongsheng Zhao
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China.
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17
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Zhao Y, Su B, Zhong L, Chen F, Fu Q. Largely Improved Mechanical Properties of a Poly(styrene-b-isoprene-b-styrene) Thermoplastic Elastomer Prepared under Dynamic-Packing Injection Molding. Ind Eng Chem Res 2014. [DOI: 10.1021/ie5022514] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yongsheng Zhao
- State Key Laboratory of Polymer Materials Engineering, College of Polymer Science & Engineering, Sichuan University, Chengdu 610065, People’s Republic of China
| | - Bin Su
- State Key Laboratory of Polymer Materials Engineering, College of Polymer Science & Engineering, Sichuan University, Chengdu 610065, People’s Republic of China
| | - Licai Zhong
- Department of Electrical and Mechanical Engineering, Lanzhou Resources & Environment Voc-Tech College, Lanzhou 730021, People’s Republic of China
| | - Feng Chen
- State Key Laboratory of Polymer Materials Engineering, College of Polymer Science & Engineering, Sichuan University, Chengdu 610065, People’s Republic of China
| | - Qiang Fu
- State Key Laboratory of Polymer Materials Engineering, College of Polymer Science & Engineering, Sichuan University, Chengdu 610065, People’s Republic of China
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18
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Enhanced electrical conductivity and mechanical property of SBS/graphene nanocomposite. JOURNAL OF POLYMER RESEARCH 2014. [DOI: 10.1007/s10965-014-0456-x] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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19
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Shi W, Lynd NA, Montarnal D, Luo Y, Fredrickson GH, Kramer EJ, Ntaras C, Avgeropoulos A, Hexemer A. Toward Strong Thermoplastic Elastomers with Asymmetric Miktoarm Block Copolymer Architectures. Macromolecules 2014. [DOI: 10.1021/ma402566g] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Weichao Shi
- Materials Research Laboratory, ‡Department of Chemical
Engineering, and §Department of
Materials, University of California at Santa Barbara, Santa Barbara, California 93106, United States
| | - Nathaniel A. Lynd
- Materials Research Laboratory, ‡Department of Chemical
Engineering, and §Department of
Materials, University of California at Santa Barbara, Santa Barbara, California 93106, United States
| | - Damien Montarnal
- Materials Research Laboratory, ‡Department of Chemical
Engineering, and §Department of
Materials, University of California at Santa Barbara, Santa Barbara, California 93106, United States
| | - Yingdong Luo
- Materials Research Laboratory, ‡Department of Chemical
Engineering, and §Department of
Materials, University of California at Santa Barbara, Santa Barbara, California 93106, United States
| | - Glenn H. Fredrickson
- Materials Research Laboratory, ‡Department of Chemical
Engineering, and §Department of
Materials, University of California at Santa Barbara, Santa Barbara, California 93106, United States
| | - Edward J. Kramer
- Materials Research Laboratory, ‡Department of Chemical
Engineering, and §Department of
Materials, University of California at Santa Barbara, Santa Barbara, California 93106, United States
| | - Christos Ntaras
- Department of Materials Science
and Engineering, University of Ioannina, University Campus, Ioannina, Greece 45110
| | - Apostolos Avgeropoulos
- Department of Materials Science
and Engineering, University of Ioannina, University Campus, Ioannina, Greece 45110
| | - Alexander Hexemer
- Advanced Light Source, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, California 94720, United States
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20
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Wu J, Li H, Wu S, Huang G, Xing W, Tang M, Fu Q. Influence of magnetic nanoparticle size on the particle dispersion and phase separation in an ABA triblock copolymer. J Phys Chem B 2014; 118:2186-93. [PMID: 24479376 DOI: 10.1021/jp410604a] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Oleic acid modified iron oxide nanoparticles (IONs) with different sizes were synthesized and mixed with styrene-butadiene-styrene block copolymer (SBS) with a lamellar structure. The octadecene segments on the oleic acid molecules have chemical affinity with the polybutadiene (PB) blocks, which makes IONs tend to be selectively confined in the microphase-separated PB domains. However, the dispersion state strongly depends on the ratio of the particle diameter (d) to the lamellar thickness (l) of the PB domains, which further changes the phase separation of SBS. When d/l ∼0.5, most of IONs are concentrated in the middle of the PB layers at low particle loading. Upon increasing the particle loading, part of IONs contact each other to form long strings due to their strong magnetic interactions. Away from the strings, IONs are either selectively dispersed in the middle and at the interfaces of the PB domains, or randomly distributed at some regions in which the phase separation of SBS is suppressed. The phase separation of SBS transforms from the lamellar structure to a cylinder structure when the IONs loading is higher than 16.7 wt %. As d is comparable to l, IONs aggregate to form clusters of 100 to 300 nm in size, but within the clusters IONs are still selectively dispersed in the PB domains instead of forming macroscopic phase separation. It is interpreted in terms of the relatively small conformational entropy of the middle blocks of SBS; thus, incorporation of nanoparticles does not lead to much loss of conformational entropy. Although incorporation of IONs with d/l ∼1 significantly increases the interfacial curvature and roughness, it has less influence on the phase separation structure of SBS due to the inhomogeneous dispersion. When d is larger than l, IONs are macroscopically separated from the SBS matrix to form clusters of hundreds of nanometers to several micrometers. More interestingly, the phase separation of SBS transforms from the lamellar structure to a two-phase co-continuous structure, probably due to the rearrangement of SBS molecules to cover the clusters with PB segments and the strong magnetic interaction exerting additional force on the SBS matrix during the evaporation of the solvent and the subsequent thermal annealing process.
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Affiliation(s)
- Jinrong Wu
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University , Chengdu 610065, China
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21
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Ke W, Qin Z, Qiang F. CONTROL OF HIERARCHICAL STRUCTURE IN POLYMER ARTICLES <I>VIA</I> NOVEL PROCESSING METHODULOGY——FROM TRADITIONAL TOWARD STRUCTURING PROCESSING. ACTA POLYM SIN 2013. [DOI: 10.3724/sp.j.1105.2013.12417] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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