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Tarazona NA, Keller M, Machatschek R. Molecular Chirality of Biosynthesized PHB Translates into Uniformly Curved Single Crystals in Langmuir Films. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2312058. [PMID: 38577827 DOI: 10.1002/smll.202312058] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/30/2023] [Revised: 03/19/2024] [Indexed: 04/06/2024]
Abstract
While in nature, molecular chirality enables the formation of chiral macroscopic structures through crystallization and self-organization, such a transfer of molecular information to higher hierarchical levels is rarely observed in vitro. Here, the study reports on single crystals of microbially synthesized polyester poly[(R)-3-hydroxybutyrate], which have chiral habits when grown at the air-water interface, in analogy to the 2D crystallization of chiral lipids such as DPPC. Depending on the crystallization conditions, the chiral single crystals either undergo a transition into fiber-like structures, orassemble into larger superstructures with a uniform sense of rotation.
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Affiliation(s)
- Natalia A Tarazona
- Institute of Active Polymers, Helmholtz Zentrum Hereon, 14513, Teltow, Germany
| | - Manuela Keller
- Institute of Active Polymers, Helmholtz Zentrum Hereon, 14513, Teltow, Germany
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2
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Xiao Y, Bao Y, Liu Y, Xu J, Zhang A, Zhu C, Cui S. Regulating the Crystallization Morphology of Poly(vinylidene fluoride‐chlorotrifluoroethylene) Ultrathin Film by Changing Temperature and Substrate. MACROMOL CHEM PHYS 2022. [DOI: 10.1002/macp.202100469] [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)
- Yaoxin Xiao
- Institute of Chemical Materials China Academy of Engineering Physics Mianyang 621900 China
- Key Laboratory of Advanced Technologies of Materials Southwest Jiaotong University Chengdu 610031 China
| | - Yu Bao
- Institute of Chemical Materials China Academy of Engineering Physics Mianyang 621900 China
| | - Yu Liu
- Key Laboratory of Advanced Technologies of Materials Southwest Jiaotong University Chengdu 610031 China
| | - Jinjiang Xu
- Key Laboratory of Advanced Technologies of Materials Southwest Jiaotong University Chengdu 610031 China
| | - Aimin Zhang
- Key Laboratory for Liquid‐Solid Structural Evolution and Processing of Materials (Ministry of Education) Shandong University Jinan 250061 China
| | - Chunhua Zhu
- Key Laboratory of Advanced Technologies of Materials Southwest Jiaotong University Chengdu 610031 China
| | - Shuxun Cui
- Institute of Chemical Materials China Academy of Engineering Physics Mianyang 621900 China
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3
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Li S, Li Z, Wang X, Zhan P, Gui X, Hu J, Lin S, Tu Y. Terraced and Three-dimensional Pyramid-shaped Polymer Single Crystal via low temperature-Assisted Microfluidic Technology. Macromol Rapid Commun 2021; 43:e2100747. [PMID: 34967476 DOI: 10.1002/marc.202100747] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2021] [Revised: 12/18/2021] [Indexed: 11/11/2022]
Abstract
Three-dimensional pyramidal polymer single crystals provide spatial gradient variations within the crystal molecules, and these variations facilitate the study of the relationship between structure and properties within the molecules of various complexes with anisotropic structures. As described herein, we propose a low-temperature-assisted microfluidic pore channeling approach to prepare structurally ordered polymer single crystals. A mixture of dichloromethane and dimethyl sulfoxide was used as a prepolymer, and a liquid microfluidic technique was employed to grow the end-functionalized polymers into three-dimensional polymer single crystals. Through the ordered growth of single crystals, a personalized pyramidal pattern with a homogeneous structure was formed. To evaluate the mesh node density, low-temperature growth time and substrate type were also investigated. Rectangular, pyramidal, and dendritic patterns were synthesized via low-temperature single crystal growth. This work shows that low temperature-assisted microfluidics provides a novel means to tune the three-dimensional structure of polymer single crystals. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Shi Li
- Guangzhou Institute of Chemistry, Chinese Academy of Sciences, Guangzhou, 510650, P.R. China.,University of Chinese Academy of Sciences, Beijing, 100049, P.R. China
| | - Zhihua Li
- Guangzhou Institute of Chemistry, Chinese Academy of Sciences, Guangzhou, 510650, P.R. China.,University of Chinese Academy of Sciences, Beijing, 100049, P.R. China
| | - Xiao Wang
- Guangzhou Institute of Chemistry, Chinese Academy of Sciences, Guangzhou, 510650, P.R. China.,University of Chinese Academy of Sciences, Beijing, 100049, P.R. China
| | - Pei Zhan
- Guangzhou Institute of Chemistry, Chinese Academy of Sciences, Guangzhou, 510650, P.R. China.,University of Chinese Academy of Sciences, Beijing, 100049, P.R. China
| | - Xuefeng Gui
- Guangzhou Institute of Chemistry, Chinese Academy of Sciences, Guangzhou, 510650, P.R. China.,University of Chinese Academy of Sciences, Beijing, 100049, P.R. China.,CAS Engineering Laboratory for Special Fine Chemicals, Guangzhou, 510650, P.R. China.,Incubator of Nanxiong CAS Co., Ltd., Nanxiong, 512400, P.R. China.,Guangdong Provincial Key Laboratory of Organic Polymer Materials for Electronics, Guangzhou, 510650, P.R. China
| | - Jiwen Hu
- Guangzhou Institute of Chemistry, Chinese Academy of Sciences, Guangzhou, 510650, P.R. China.,University of Chinese Academy of Sciences, Beijing, 100049, P.R. China.,CAS Engineering Laboratory for Special Fine Chemicals, Guangzhou, 510650, P.R. China.,Incubator of Nanxiong CAS Co., Ltd., Nanxiong, 512400, P.R. China.,Guangdong Provincial Key Laboratory of Organic Polymer Materials for Electronics, Guangzhou, 510650, P.R. China
| | - Shudong Lin
- Guangzhou Institute of Chemistry, Chinese Academy of Sciences, Guangzhou, 510650, P.R. China.,University of Chinese Academy of Sciences, Beijing, 100049, P.R. China.,CAS Engineering Laboratory for Special Fine Chemicals, Guangzhou, 510650, P.R. China.,Incubator of Nanxiong CAS Co., Ltd., Nanxiong, 512400, P.R. China.,Guangdong Provincial Key Laboratory of Organic Polymer Materials for Electronics, Guangzhou, 510650, P.R. China
| | - Yuanyuan Tu
- Guangzhou Institute of Chemistry, Chinese Academy of Sciences, Guangzhou, 510650, P.R. China.,University of Chinese Academy of Sciences, Beijing, 100049, P.R. China.,CAS Engineering Laboratory for Special Fine Chemicals, Guangzhou, 510650, P.R. China.,Incubator of Nanxiong CAS Co., Ltd., Nanxiong, 512400, P.R. China.,Guangdong Provincial Key Laboratory of Organic Polymer Materials for Electronics, Guangzhou, 510650, P.R. China
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Nagendra B, Vignola E, Daniel C, Rizzo P, Guerra G. Dependence on Film Thickness of Guest-Induced c Perpendicular Orientation in PPO Films. Polymers (Basel) 2021; 13:4384. [PMID: 34960935 PMCID: PMC8704930 DOI: 10.3390/polym13244384] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2021] [Revised: 11/30/2021] [Accepted: 12/10/2021] [Indexed: 11/24/2022] Open
Abstract
For poly(2,6-dimethyl-1,4-phenylene)oxide (PPO) films exhibiting nanoporous-crystalline (NC) phases, c⟂ orientation (i.e., crystalline polymer chain axes being preferentially perpendicular to the film plane) is obtained by crystallization of amorphous films, as induced by sorption of suitable low-molecular-mass guest molecules. The occurrence of c⟂ orientation is relevant for applications of NC PPO films because it markedly increases film transparency as well as guest diffusivity. Surprisingly, we show that the known crystallization procedures lead to c⟂ oriented thick (50-300 μm) films and to unoriented thin (≤20 μm) films. This absence of crystalline phase orientation for thin films is rationalized by fast guest sorption kinetics, which avoid co-crystallization in confined spaces and hence inhibit formation of flat-on lamellae. For thick films exhibiting c⟂ orientation, sigmoid kinetics of guest sorption and of thickening of PPO films are observed, with inflection points associated with guest-induced film plasticization. Corresponding crystallization kinetics are linear with time and show that co-crystal growth is poorly affected by film plasticization. An additional relevant result of this study is the linear relationship between WAXD crystallinity index and DSC melting enthalpy, which allows evaluation of melting enthalpy of the NC α form of PPO (ΔHmο = 42 ± 2 J/g).
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Affiliation(s)
| | | | | | | | - Gaetano Guerra
- Dipartimento di Chimica e Biologia, INSTM Research Unit, Università di Salerno, Via Giovanni Paolo II 132, 84084 Fisciano, Italy; (B.N.); (E.V.); (C.D.); (P.R.)
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5
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Pal S, Srivastava RK, Nandan B. Effect of spinning solvent on crystallization behavior of confined polymers in electrospun nanofibers. POLYMER CRYSTALLIZATION 2021. [DOI: 10.1002/pcr2.10209] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- Sanchayan Pal
- Department of Textile and Fibre Engineering Indian Institute of Technology Delhi New Delhi Delhi India
| | - Rajiv K. Srivastava
- Department of Textile and Fibre Engineering Indian Institute of Technology Delhi New Delhi Delhi India
| | - Bhanu Nandan
- Department of Textile and Fibre Engineering Indian Institute of Technology Delhi New Delhi Delhi India
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6
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Agbolaghi S, Abbaspoor S, Abbasi F. A comprehensive review on polymer single crystals—From fundamental concepts to applications. Prog Polym Sci 2018. [DOI: 10.1016/j.progpolymsci.2017.11.006] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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7
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8
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Reorientation of the poly(3-hydroxybutyrate- co -3-hydroxyhexanoate) crystal in thin film induced by polyethylene glycol. POLYMER 2017. [DOI: 10.1016/j.polymer.2017.05.050] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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10
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Control of morphology and lamellae orientations in thin poly (ε-caprolactone) films by blending with different molar mass of polystyrene. Eur Polym J 2017. [DOI: 10.1016/j.eurpolymj.2017.01.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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11
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Agbolaghi S, Abbasi F, Abbaspoor S. Double/single phase segregation and vertical stratification induced by crystallization in all-crystalline tri/diblock copolymers and homopolymer blends of poly(3-hexylthiophene) and poly(ethylene glycol). SURF INTERFACE ANAL 2016. [DOI: 10.1002/sia.6202] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Samira Agbolaghi
- Institute of Polymeric Materials; Sahand University of Technology; Tabriz Iran
- Faculty of Polymer Engineering; Sahand University of Technology; Tabriz Iran
| | - Farhang Abbasi
- Institute of Polymeric Materials; Sahand University of Technology; Tabriz Iran
- Faculty of Polymer Engineering; Sahand University of Technology; Tabriz Iran
| | - Saleheh Abbaspoor
- Institute of Polymeric Materials; Sahand University of Technology; Tabriz Iran
- Faculty of Polymer Engineering; Sahand University of Technology; Tabriz Iran
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12
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Agbolaghi S, Zenoozi S, Hosseini Z, Abbasi F. Scrolled/Flat Crystalline Structures of Poly(3-hexylthiophene) and Poly(ethylene glycol) Block Copolymers Subsuming Unseeded Half-Ring-Like and Seeded Cubic, Epitaxial, and Fibrillar Crystals. Macromolecules 2016. [DOI: 10.1021/acs.macromol.6b02295] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Samira Agbolaghi
- Institute of Polymeric Materials and ‡Faculty of Polymer Engineering, Sahand University of Technology, 5331711111 Tabriz, Iran
| | - Sahar Zenoozi
- Institute of Polymeric Materials and ‡Faculty of Polymer Engineering, Sahand University of Technology, 5331711111 Tabriz, Iran
| | - Zahra Hosseini
- Institute of Polymeric Materials and ‡Faculty of Polymer Engineering, Sahand University of Technology, 5331711111 Tabriz, Iran
| | - Farhang Abbasi
- Institute of Polymeric Materials and ‡Faculty of Polymer Engineering, Sahand University of Technology, 5331711111 Tabriz, Iran
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13
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Shinotsuka K, Assender H. In situAFM study of near-surface crystallization in PET and PEN. J Appl Polym Sci 2016. [DOI: 10.1002/app.44269] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Kei Shinotsuka
- Department of Materials; University of Oxford; Parks Road Oxford OX1 3PH United Kingdom
| | - Hazel Assender
- Department of Materials; University of Oxford; Parks Road Oxford OX1 3PH United Kingdom
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14
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Chen Y, Gan T, Ma C, Wang L, Zhang G. Crystallization of Polymer Chains Chemically Attached on a Surface: Lamellar Orientation from Flat-on to Edge-on. J Phys Chem B 2016; 120:4715-22. [DOI: 10.1021/acs.jpcb.6b02344] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Yihuang Chen
- Faculty
of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, P. R. China
| | - Tiansheng Gan
- Faculty
of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, P. R. China
| | - Chunfeng Ma
- Faculty
of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, P. R. China
| | - Linge Wang
- Faculty
of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, P. R. China
| | - Guangzhao Zhang
- Faculty
of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, P. R. China
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15
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Wu N, Lang S, Zhang H, Ding M, Zhang J. Solvent-Induced Crystallization Behaviors of PLLA Ultrathin Films Investigated by RAIR Spectroscopy and AFM Measurements. J Phys Chem B 2014; 118:12652-9. [DOI: 10.1021/jp506840e] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Ningjing Wu
- Key Laboratory of Rubber-Plastics, Ministry of Education/Shandong Provincial Key Laboratory of Rubber-Plastics, Qingdao University of Science & Technology, Qingdao City 266042, People’s Republic of China
| | - Shuguo Lang
- Key Laboratory of Rubber-Plastics, Ministry of Education/Shandong Provincial Key Laboratory of Rubber-Plastics, Qingdao University of Science & Technology, Qingdao City 266042, People’s Republic of China
| | - Hong Zhang
- Key Laboratory of Rubber-Plastics, Ministry of Education/Shandong Provincial Key Laboratory of Rubber-Plastics, Qingdao University of Science & Technology, Qingdao City 266042, People’s Republic of China
| | - Meichun Ding
- Key Laboratory of Rubber-Plastics, Ministry of Education/Shandong Provincial Key Laboratory of Rubber-Plastics, Qingdao University of Science & Technology, Qingdao City 266042, People’s Republic of China
| | - Jianming Zhang
- Key Laboratory of Rubber-Plastics, Ministry of Education/Shandong Provincial Key Laboratory of Rubber-Plastics, Qingdao University of Science & Technology, Qingdao City 266042, People’s Republic of China
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16
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Ambre AH, Katti DR, Katti KS. Biomineralized hydroxyapatite nanoclay composite scaffolds with polycaprolactone for stem cell-based bone tissue engineering. J Biomed Mater Res A 2014; 103:2077-101. [DOI: 10.1002/jbm.a.35342] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2014] [Revised: 09/15/2014] [Accepted: 09/23/2014] [Indexed: 12/12/2022]
Affiliation(s)
- Avinash H. Ambre
- Department of Civil and Environmental Engineering; North Dakota State University; Fargo North Dakota 58105
| | - Dinesh R. Katti
- Department of Civil and Environmental Engineering; North Dakota State University; Fargo North Dakota 58105
| | - Kalpana S. Katti
- Department of Civil and Environmental Engineering; North Dakota State University; Fargo North Dakota 58105
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17
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Liu R, Li K, Liu M, Liu Y, Liu H. Free poly(l-lactic acid) spherulites grown from thermally induced phase separation and crystallization kinetics. ACTA ACUST UNITED AC 2014. [DOI: 10.1002/polb.23587] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Ruilai Liu
- Fujian Provincial Key Laboratory of Polymer Materials; College of Material Science and Engineering, Fujian Normal University; Fujian 350007 China
- College of Ecological and Resources Engineering; Wuyi University; Fujian 354300 China
| | - Kaina Li
- Fujian Provincial Key Laboratory of Polymer Materials; College of Material Science and Engineering, Fujian Normal University; Fujian 350007 China
| | - Min Liu
- Fujian Provincial Key Laboratory of Polymer Materials; College of Material Science and Engineering, Fujian Normal University; Fujian 350007 China
| | - Yingying Liu
- Fujian Provincial Key Laboratory of Polymer Materials; College of Material Science and Engineering, Fujian Normal University; Fujian 350007 China
| | - Haiqing Liu
- Fujian Provincial Key Laboratory of Polymer Materials; College of Material Science and Engineering, Fujian Normal University; Fujian 350007 China
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18
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Controlling of crystallite orientation for poly(ethylene oxide) thin films with cellulose single nano-fibers. POLYMER 2014. [DOI: 10.1016/j.polymer.2014.06.004] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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19
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Thickness-dependent orientation structure in poly(ethylene oxide) multi-layer crystals. CHINESE JOURNAL OF POLYMER SCIENCE 2014. [DOI: 10.1007/s10118-014-1504-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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20
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Substrate effects on crystal orientations and structures of poly(ethylene-ran-vinyl acetate) ultrathin films. POLYMER 2013. [DOI: 10.1016/j.polymer.2013.06.024] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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21
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EVOLUTION OF CRYSTAL PATTERNS OF SINGLE-LAYER LAMELLAE OF STAR-SHAPED PEO SAMPLES. ACTA POLYM SIN 2013. [DOI: 10.3724/sp.j.1105.2013.12330] [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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22
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Ding Z, Xing R, Sun Y, Zheng L, Wang X, Ding J, Wang L, Han Y. Effects of molecular structures and solvent properties on the self-assembly of carbazole-based conjugated dendrimers by solvent vapor annealing. RSC Adv 2013. [DOI: 10.1039/c3ra23272g] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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23
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Mejía A, García N, Guzmán J, Tiemblo P. Confinement and nucleation effects in poly(ethylene oxide) melt-compounded with neat and coated sepiolite nanofibers: Modulation of the structure and semicrystalline morphology. Eur Polym J 2013. [DOI: 10.1016/j.eurpolymj.2012.09.014] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Li Y, Zhou J, Li J, Gou QT, Gu Q, Wang ZB. Crystallization and morphology of star-shaped polyethylenoxyde-b-polycaprolactone under high pressure carbon dioxide. CHINESE JOURNAL OF POLYMER SCIENCE 2012. [DOI: 10.1007/s10118-012-1177-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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26
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Yoon JG, Zin WC, Kim JH. Crystal orientations and structures of poly(ethylene-ran-vinyl acetate) films coated onto silicon substrates. POLYMER 2012. [DOI: 10.1016/j.polymer.2012.04.044] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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27
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Brushless and controlled microphase separation of lamellar polystyrene-b-polyethylene oxide thin films for block copolymer nanolithography. ACTA ACUST UNITED AC 2012. [DOI: 10.1002/polb.23082] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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28
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Insight into how molecular structures of thiophene-based conjugated polymers affect crystallization behaviors. POLYMER 2011. [DOI: 10.1016/j.polymer.2011.03.026] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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29
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Yang P, Yu X, Han Y. Transition between crystallization and microphase separation in PS-b-PEO thin film Influenced by solvent vapor selectivity. POLYMER 2010. [DOI: 10.1016/j.polymer.2010.08.025] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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30
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Chen R, Li L, Zhao J. Single chain diffusion of poly(ethylene oxide) in its monolayers before and after crystallization. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:5951-5956. [PMID: 20039653 DOI: 10.1021/la903897v] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Lateral diffusion of single chain related to the crystallization process of poly(ethylene oxide) (PEO) in its monolayers on silica surfaces is studied by single molecule fluorescence microscopy and single molecule tracking techniques. Diffusion of PEO chains is observed in the supercooled state before crystallization as well as in the noncrystalline regions after crystallization. In the postcrystallization monolayers, the diffusion coefficient of PEO chains is an order of magnitude lower than that in the supercooled state before crystallization. The origin is attributed to the change of polymer surface concentration due to the consumption of polymer molecules in the crystal formation. This is supported by the results showing a monotonous decrease of diffusion coefficient with the thickness decrease of the monolayer in its supercooled state. The PEO chains take a more flattened conformation under lower surface concentration and stick stronger to the surface. As a consequence, the diffusion rate is reduced. The results clearly demonstrate a strong mutual effect between the crystallization process and the mass transportation for the polymer crystallization under surface confinement.
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Affiliation(s)
- Rui Chen
- Beijing Laboratory of Molecular Science, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
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