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Guo Y, Luo W, Zhang J, Hu W. Dynamic Monte Carlo simulations of strain-induced crystallization in multiblock copolymers: Effects of microphase separation. POLYMER 2022. [DOI: 10.1016/j.polymer.2022.125512] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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2
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Jiang J, Zhou M, Li Y, Chen B, Tian F, Zhai W. Cell structure and hardness evolutions of TPU foamed sheets with high hardness via a temperature rising foaming process. J Supercrit Fluids 2022. [DOI: 10.1016/j.supflu.2022.105654] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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3
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Investigation on the crystallization behavior and detail spherulitic morphology of two crystal forms of thermoplastic polyurethanes. JOURNAL OF POLYMER RESEARCH 2022. [DOI: 10.1007/s10965-022-03112-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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4
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Guo Y, Wang J, Luo W, Hu W. Dynamic Monte Carlo simulations of strain-induced crystallization in multiblock copolymers: effects of dilution. SOFT MATTER 2022; 18:3376-3383. [PMID: 35416236 DOI: 10.1039/d2sm00193d] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Multiblock copolymers containing alternating semicrystalline and molten blocks are good thermoplastic elastomers. Their crystallization in the stretching process is however complicated by the dilution effects, prior microphase separation and contrast chain rigidity of the molten blocks. We designed our systematic investigation with three integrated steps, and herein, as the first step, we considered only the dilution effects without prior microphase separation and contrast chain rigidity. We compared two extreme situations of local dilution separately corresponding to parallel-posited and antiparallel-posited block copolymers upon strain-induced crystallization. Our dynamic Monte Carlo simulations of diblock and tetrablock copolymers demonstrated that the stretching introduces a constraint on the diffusion of locally posited crystallizable blocks along the stretching direction for crystallization and thus enhances the dilution effects to result in a higher diversity in crystal stabilities. We observed that the strain-induced crystallization of parallel-posited copolymers behaved like the melt crystallization of homopolymers; in contrast, the strain-induced crystallization of antiparallel-posited copolymers yielded crystallites near the block junction, which are relatively small and less stable due to their local dilution suppressing their melting points. Similar to the case of spider dragline silks, two contrasting stabilities of crystallites in semicrystalline multiblock copolymers explain their good toughness. Our modeling approach paves the way toward a better understanding of the structure-property relationship in the semicrystalline thermoplastic elastomers.
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Affiliation(s)
- Yaqian Guo
- School of Chemistry and Chemical Engineering, State Key Lab of Coordinate Chemistry, Nanjing University, Nanjing 210023, P. R. China.
| | - Jiping Wang
- School of Chemistry and Chemical Engineering, State Key Lab of Coordinate Chemistry, Nanjing University, Nanjing 210023, P. R. China.
| | - Wen Luo
- School of Chemistry and Chemical Engineering, State Key Lab of Coordinate Chemistry, Nanjing University, Nanjing 210023, P. R. China.
| | - Wenbing Hu
- School of Chemistry and Chemical Engineering, State Key Lab of Coordinate Chemistry, Nanjing University, Nanjing 210023, P. R. China.
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5
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Wang S, Wang X, Huang H. Surface modification of
TiO
2
particles with 12‐hydroxy stearic acid and the effect of particle size on the mechanical and thermal properties of thermoplastic polyurethane urea elastomers. J Appl Polym Sci 2021. [DOI: 10.1002/app.49898] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Shuxiao Wang
- Jiangsu Key Laboratory for the Design and Application of Advanced Functional Polymers, College of Chemistry, Chemical Engineering and Materials Science Soochow University Suzhou China
| | - Xiaoyan Wang
- Jiangsu Key Laboratory for the Design and Application of Advanced Functional Polymers, College of Chemistry, Chemical Engineering and Materials Science Soochow University Suzhou China
| | - He Huang
- Jiangsu Key Laboratory for the Design and Application of Advanced Functional Polymers, College of Chemistry, Chemical Engineering and Materials Science Soochow University Suzhou China
- National & Local Joint Engineering Laboratory of Advanced Functional Polymeric Materials Soochow University Suzhou China
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6
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Fiorio R, Danda C, Maia J. Influence of trisilanol isooctyl POSS content on the structure, morphology and rheological properties of thermoplastic polyurethane (TPU). JOURNAL OF POLYMER ENGINEERING 2020. [DOI: 10.1515/polyeng-2020-0154] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
AbstractIn this study, thermoplastic polyurethanes (TPUs) containing trisilanol isooctyl polyhedral oligomeric silsesquioxane (POSS), a reactive nanofiller, were synthesized and characterized rheologically and morphologically, and the effects of POSS content on the melt thermal stability of the TPUs are investigated. Samples containing 0, 0.23, 0.57, 1.14, and 2.23% (w/w) POSS were synthesized by reactive extrusion and characterized by Fourier transform infrared spectroscopy (FTIR), oscillatory and extensional rheometry, atomic force microscopy (AFM), and small- and wide-angle X-ray scattering (SAXS and WAXS, respectively). The rheological properties of molten TPU are time-dependent and the melt thermal stability of the TPU is maximal at 1.14% of POSS. The addition of 0.23 and 0.57% POSS promotes strain-hardening at low extensional strain rates (0.01 and 0.10 s−1), not affecting the extensional characteristics at higher strain rates. The addition of increasing amounts of POSS leads to the formation of POSS-rich clusters well dispersed in the TPU matrix. SAXS and WAXS results show that the POSS domains are amorphous and that POSS does not modify the crystalline structure of TPU. Therefore, this work indicates that synthesizing TPU in the presence of trisilanol isooctyl POSS can increase the melt thermal stability of the polymer, facilitating its processing.
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Affiliation(s)
- Rudinei Fiorio
- Instituto Federal de EducaçãoCiência e Tecnologia do Rio Grande do Sul, Avelino Antônio de Souza, 1730 Nossa Sra. de Fátima, Caxias do Sul, Rio Grande do Sul, 95043-700, Brazil
| | - Chaitanya Danda
- Department of Macromolecular Science and Engineering, Case Western Reserve University, 2100 Adelbert Rd., Cleveland, Ohio, 44106-7202, USA
| | - João Maia
- Department of Macromolecular Science and Engineering, Case Western Reserve University, 2100 Adelbert Rd., Cleveland, Ohio, 44106-7202, USA
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Xu Z, Wang X, Huang H. Thermoplastic polyurethane–urea elastomers with superior mechanical and thermal properties prepared from alicyclic diisocyanate and diamine. J Appl Polym Sci 2020. [DOI: 10.1002/app.49575] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Zichong Xu
- Jiangsu Key Laboratory for the Design and Application of Advanced Functional Polymers, College of Chemistry, Chemical Engineering and Materials Science Soochow University Suzhou China
| | - Xiaoyan Wang
- Jiangsu Key Laboratory for the Design and Application of Advanced Functional Polymers, College of Chemistry, Chemical Engineering and Materials Science Soochow University Suzhou China
| | - He Huang
- Jiangsu Key Laboratory for the Design and Application of Advanced Functional Polymers, College of Chemistry, Chemical Engineering and Materials Science Soochow University Suzhou China
- National and Local Joint Engineering Laboratory of Advanced Functional Polymeric Materials Soochow University Suzhou China
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Rahmawati R, Masuda S, Cheng CH, Nagano C, Nozaki S, Kamitani K, Kojio K, Takahara A, Shinohara N, Mita K, Uchida K, Yamasaki S. Investigation of Deformation Behavior of Thiourethane Elastomers Using In Situ X-ray Scattering, Diffraction, and Absorption Methods. Macromolecules 2019. [DOI: 10.1021/acs.macromol.9b00982] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
| | | | | | | | | | | | | | | | | | | | | | - Satoshi Yamasaki
- Coatings & Engineering Materials Division, Food & Package Business Sector, Mitsui Chemicals, Incorporation, Shiodome City Center, 1-5-2 Higashi-shimbashi, Minato-ku, Tokyo 105-7122, Japan
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Stribeck A, Eling B, Pöselt E, Malfois M, Schander E. Melting, Solidification, and Crystallization of a Thermoplastic Polyurethane as a Function of Hard Segment Content. MACROMOL CHEM PHYS 2019. [DOI: 10.1002/macp.201900074] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Almut Stribeck
- Institute of Technical and Macromolecular Chemistry Bundesstr. 45 20146 Hamburg Germany
| | - Berend Eling
- Institute of Technical and Macromolecular Chemistry Bundesstr. 45 20146 Hamburg Germany
- BASF Polyurethanes GmbH Elastogranstr. 60 49448 Lemförde Germany
| | - Elmar Pöselt
- BASF Polyurethanes GmbH Elastogranstr. 60 49448 Lemförde Germany
| | - Marc Malfois
- ALBA Synchrotron Light Source 08290 Cerdanyola del Vallès Catalonia Spain
| | - Edgar Schander
- BASF Polyurethanes GmbH Elastogranstr. 60 49448 Lemförde Germany
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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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Jiang L, Ren Z, Zhao W, Liu W, Liu H, Zhu C. Synthesis and structure/properties characterizations of four polyurethane model hard segments. ROYAL SOCIETY OPEN SCIENCE 2018; 5:180536. [PMID: 30109100 PMCID: PMC6083698 DOI: 10.1098/rsos.180536] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2018] [Accepted: 06/20/2018] [Indexed: 06/01/2023]
Abstract
Four model polyurethane (PU) hard segments were synthesized by reaction of butanol with four typical diisocyanates. The four diisocyanates were aromatic 4,4'-diphenylmethane diisocyanate (4,4'-MDI) and MDI-50 (50% mixture of 2,4'-MDI and 4,4'-MDI), cycloaliphatic 4,4'-dicyclohexylmethane diisocyanate (HMDI) and linear aliphatic 1,6-hexamethylene diisocyanate (HDI). FTIR, 1H NMR, 13C NMR, MS, X-ray and DSC methods were employed to determine their structures and to analyse their crystallization behaviours and hydrogen bonding interactions. Each of the four PU compounds prepared in the present work displays unique spectral characteristics. The FTIR bands and NMR resonance peaks assigned in the four samples thus provide a reliable database and starting point for investigating the relationship between hard segment structure and the crystallization and hydrogen bonding behaviour in more complex-segmented PU compositions.
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Affiliation(s)
- Lei Jiang
- School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, People's Republic of China
- High and New Technology Research Center of Henan Academy of Sciences, Zhengzhou 450002, People's Republic of China
| | - Zhiyong Ren
- High and New Technology Research Center of Henan Academy of Sciences, Zhengzhou 450002, People's Republic of China
| | - Wei Zhao
- High and New Technology Research Center of Henan Academy of Sciences, Zhengzhou 450002, People's Republic of China
| | - Wentao Liu
- School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, People's Republic of China
| | - Hao Liu
- School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, People's Republic of China
| | - Chengshen Zhu
- School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, People's Republic of China
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