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Wang D, Li S, Lu Y, Wang J, Men Y. Melt Memory Effect in Polyethylene Random Terpolymer with Small Amount of 1-Octene and 1-Hexene Co-Units: Non-Isothermal and Isothermal Investigations. Polymers (Basel) 2023; 15:polym15071721. [PMID: 37050335 PMCID: PMC10096915 DOI: 10.3390/polym15071721] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2023] [Revised: 03/19/2023] [Accepted: 03/28/2023] [Indexed: 04/03/2023] Open
Abstract
Homo-polymers of reasonable molecular weight relax very fast in the molten state. Starting from a semi-crystalline structure, when the homo-polymer is heated up to a temperature higher than its nominal melting temperature, it relaxes quickly into a homogenous molten state. The following crystallization temperature during cooling remains constant irrespective of the melt temperature. However, the situation is evidently different in copolymers. A phenomenon named the crystallization melt memory effect denotes an increased crystallization rate during cooling after a polymer was melted at different temperatures, which is often observed. The melt temperature can be even higher than the equilibrium melting temperature of the corresponding polymer crystals. In this work, we investigated such memory effect in a polyethylene random terpolymer with a small fraction of 1-octene and 1-hexene co-units using differential scanning calorimetry techniques. Both non-isothermal and isothermal protocols were employed. In non-isothermal tests, a purposely prepared sample with well defined thermal history (the sample has been first conditioned at 200 °C for 5 min to eliminate the thermal history and then cooled down to −50 °C) was melted at different temperatures, followed by a continuous cooling at a constant rate of 20 °C/min. Peak crystallization temperature during cooling was taken to represent the crystallization rate. Whereas, in isothermal tests, the same prepared sample with well defined thermal history was cooled to a certain crystallization temperature after being melted at different temperatures. Here, time to complete the isothermal crystallization was recorded. It was found that the results of isothermal tests allowed us to divide the melt temperature into four zones where the features of the crystallization half time change.
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Affiliation(s)
- Dengfei Wang
- Provincial Key Laboratory of Oil & Gas Chemical Technology, College of Chemistry & Chemical Engineering, Northeast Petroleum University, Daqing 163318, China
- Daqing Petrochemical Research Center, Petrochemical Research Institute of PetroChina, Daqing 163714, China
| | - Shiyan Li
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Renmin Street 5625, Changchun 130022, China
| | - Ying Lu
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Renmin Street 5625, Changchun 130022, China
| | - Jian Wang
- Provincial Key Laboratory of Oil & Gas Chemical Technology, College of Chemistry & Chemical Engineering, Northeast Petroleum University, Daqing 163318, China
- Correspondence: (J.W.); (Y.M.)
| | - Yongfeng Men
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Renmin Street 5625, Changchun 130022, China
- Correspondence: (J.W.); (Y.M.)
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2
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3
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Liu R, Nie Y, Ming Y, Hao T, Zhou Z. Simulations on polymer nanocomposite crystallization. POLYMER CRYSTALLIZATION 2021. [DOI: 10.1002/pcr2.10214] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Rongjuan Liu
- Research School of Polymeric Materials, School of Materials Science and Engineering Jiangsu University Zhenjiang China
| | - Yijing Nie
- Research School of Polymeric Materials, School of Materials Science and Engineering Jiangsu University Zhenjiang China
| | - Yongqiang Ming
- Research School of Polymeric Materials, School of Materials Science and Engineering Jiangsu University Zhenjiang China
| | - Tongfan Hao
- Research School of Polymeric Materials, School of Materials Science and Engineering Jiangsu University Zhenjiang China
| | - Zhiping Zhou
- Research School of Polymeric Materials, School of Materials Science and Engineering Jiangsu University Zhenjiang China
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4
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Wang YH, Gong J, Hu WB. Transparency of Temperature-responsive Shape-memory Gels Tuned by a Competition between Crystallization and Glass Transition. CHINESE JOURNAL OF POLYMER SCIENCE 2020. [DOI: 10.1007/s10118-020-2456-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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5
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Kundu C, Joshi NS, Dasmahapatra AK. Crystallization of double crystalline diblock copolymer from microphase separated melt. POLYMER CRYSTALLIZATION 2019. [DOI: 10.1002/pcr2.10089] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Chitrita Kundu
- Department of Chemical EngineeringIndian Institute of Technology Guwahati Guwahati Assam India
| | - Nikhil S. Joshi
- Department of Chemical EngineeringIndian Institute of Technology Guwahati Guwahati Assam India
| | - Ashok K. Dasmahapatra
- Department of Chemical EngineeringIndian Institute of Technology Guwahati Guwahati Assam India
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6
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Liu R, Zhou Z, Liu Y, Liang Z, Ming Y, Hao T, Nie Y. Epitaxial orientation and localized microphase separation prior to formation of nanohybrid shish-kebabs induced by one-dimensional nanofiller in miscible diblock copolymers with selective interaction. POLYMER 2019. [DOI: 10.1016/j.polymer.2019.01.057] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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7
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Mathot VBF. Molecular structure and driving force to metastable states: Janus faces in polymer crystallization. POLYM INT 2019. [DOI: 10.1002/pi.5671] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Vincent BF Mathot
- Division of Molecular and Nanomaterials, Department of Chemistry; Katholieke Universiteit Leuven; Heverlee Belgium
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8
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Liu R, Yang L, Qiu X, Wu H, Zhang Y, Liu Y, Zhou Z, Ming Y, Hao T, Nie Y. One-dimensional nanofiller induced crystallization in random copolymers studied by dynamic Monte Carlo simulations. MOLECULAR SIMULATION 2018. [DOI: 10.1080/08927022.2018.1515485] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- Rongjuan Liu
- Institute of Polymer Materials, School of Materials Science and Engineering, Jiangsu University, Zhenjiang, People’s Republic of China
| | - Luyao Yang
- Institute of Polymer Materials, School of Materials Science and Engineering, Jiangsu University, Zhenjiang, People’s Republic of China
| | - Xiaoyan Qiu
- Institute of Polymer Materials, School of Materials Science and Engineering, Jiangsu University, Zhenjiang, People’s Republic of China
| | - Haitao Wu
- Institute of Polymer Materials, School of Materials Science and Engineering, Jiangsu University, Zhenjiang, People’s Republic of China
| | - Yongqiang Zhang
- Institute of Polymer Materials, School of Materials Science and Engineering, Jiangsu University, Zhenjiang, People’s Republic of China
| | - Yong Liu
- Institute of Polymer Materials, School of Materials Science and Engineering, Jiangsu University, Zhenjiang, People’s Republic of China
| | - Zhiping Zhou
- Institute of Polymer Materials, School of Materials Science and Engineering, Jiangsu University, Zhenjiang, People’s Republic of China
| | - Yongqiang Ming
- Institute of Polymer Materials, School of Materials Science and Engineering, Jiangsu University, Zhenjiang, People’s Republic of China
| | - Tongfan Hao
- Institute of Green Chemistry and Chemical Technology, Jiangsu University, Zhenjiang, People’s Republic of China
| | - Yijing Nie
- Institute of Polymer Materials, School of Materials Science and Engineering, Jiangsu University, Zhenjiang, People’s Republic of China
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9
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Wei Y, Wu H, Weng G, Zhang Y, Cao X, Gu Z, Liu Y, Liu R, Zhou Z, Nie Y. Effect of interface on bulk polymer: control of glass transition temperature of rubber. JOURNAL OF POLYMER RESEARCH 2018. [DOI: 10.1007/s10965-018-1566-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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10
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Affiliation(s)
- Huachen Tao
- Department of Polymer Science and Engineering, State Key Lab of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, People’s Republic of China
| | - Feng Gao
- Department of Polymer Science and Engineering, State Key Lab of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, People’s Republic of China
| | - Huanhuan Gao
- Department of Polymer Science and Engineering, State Key Lab of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, People’s Republic of China
| | - Wenbing Hu
- Department of Polymer Science and Engineering, State Key Lab of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, People’s Republic of China
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11
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Guan X, Wang Y, Wang J, Wu Y, Hu W. Effects of short-chain branches on strain-induced polymer crystallization. POLYM INT 2018. [DOI: 10.1002/pi.5570] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Xinchao Guan
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering; Nanjing University; China
| | - Youhao Wang
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering; Nanjing University; China
| | - Jiping Wang
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering; Nanjing University; China
| | - Yixian Wu
- State Key Laboratory of Chemical Resource Engineering; Beijing University of Chemical Technology; Beijing China
| | - Wenbing Hu
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering; Nanjing University; China
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12
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Ramos J, Vega J, Martínez-Salazar J. Predicting experimental results for polyethylene by computer simulation. Eur Polym J 2018. [DOI: 10.1016/j.eurpolymj.2017.12.027] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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13
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Dasmahapatra AK. Effect of Composition Asymmetry on the Phase Separation and Crystallization in Double Crystalline Binary Polymer Blends: A Dynamic Monte Carlo Simulation Study. J Phys Chem B 2017; 121:5853-5866. [PMID: 28535355 DOI: 10.1021/acs.jpcb.7b02597] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Polymer blends offer an exciting material for various potential applications due to their tunable properties by varying constituting components and their relative composition. Our simulation results unravel an intrinsic relationship between crystallization behavior and composition asymmetry. We report simulation results for nonisothermal and isothermal crystallization with weak and strong segregation strength to elucidate the composition dependent crystallization behavior. With increasing composition of low melting B-polymer, macrophase separation temperature changes nonmonotonically, which is attributed to the nonmonotonic change in diffusivity of both polymers. In weak segregation strength, however, at high enough composition of B-polymer, A-polymer yields relatively thicker crystals, which is attributed to the dilution effect exhibited by B-polymer. When B-polymer composition is high enough, it acts like a "solvent" while A-polymer crystallizes. Under this situation, A-polymer segments become more mobile and less facile to crystallize. As a result, A-polymer crystallizes at a relatively low temperature with the formation of thicker crystals. At strong segregation strength, the dilution effect is accompanied by the strong A-B repulsive interaction, which is reflected in a nonmonotonic trend of the mean square radius of gyration with the increasing composition of the B-polymer. Isothermal crystallization also reveals a strong nonmonotonic relationship between composition and crystallization behavior. Two-step, compared to one-step, isothermal crystallization yields better crystals for both polymers.
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Affiliation(s)
- Ashok Kumar Dasmahapatra
- Department of Chemical Engineering, Indian Institute of Technology Guwahati , Guwahati - 781039, Assam, India
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14
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Guan X, Gao H, Zha L, Wu Y, Hu W. Strong memory of strain-induced copolymer crystallization as revealed by Monte Carlo simulations. POLYMER 2016. [DOI: 10.1016/j.polymer.2016.06.040] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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15
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16
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Liu J, Ma Y, Wu R, Yu M. Molecular simulation of diffusion-controlled kinetics in stepwise polymerization. POLYMER 2016. [DOI: 10.1016/j.polymer.2016.05.050] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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17
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Hu W, Mathot VBF, Alamo RG, Gao H, Chen X. Crystallization of Statistical Copolymers. POLYMER CRYSTALLIZATION I 2016. [DOI: 10.1007/12_2016_349] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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18
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Kundu C, Dasmahapatra AK. Effect of block asymmetry on the crystallization of double crystalline diblock copolymers. J Chem Phys 2014; 141:044902. [PMID: 25084951 DOI: 10.1063/1.4889997] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Monte Carlo simulation on the crystallization of double crystalline diblock copolymer unravels an intrinsic relationship between block asymmetry and crystallization behaviour. We model crystalline A-B diblock copolymer, wherein the melting temperature of A-block is higher than that of the B-block. We explore the composition dependent crystallization behaviour by varying the relative block length with weak and strong segregation strength between the blocks. In weak segregation limit, we observe that with increasing the composition of B-block, its crystallization temperature increases accompanying with higher crystallinity. In contrast, A-block crystallizes at a relatively low temperature along with the formation of thicker and larger crystallites with the increase in B-block composition. We attribute this non-intuitive crystallization trend to the dilution effect imposed by B-block. When the composition of the B-block is high enough, it acts like a "solvent" during the crystallization of A-block. A-block segments are more mobile and hence less facile to crystallize, resulting depression in crystallization temperature with the formation of thicker crystals. At strong segregation limit, crystallization and morphological development are governed by the confinement effect, rather than block asymmetry. Isothermal crystallization reveals that the crystallization follows a homogeneous nucleation mechanism with the formation of two-dimensional crystals. Two-step, compared to one-step isothermal crystallization leads to the formation of thicker crystals of A-block due to the dilution effect of the B-block.
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Affiliation(s)
- Chitrita Kundu
- Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati - 781039, Assam, India
| | - Ashok Kumar Dasmahapatra
- Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati - 781039, Assam, India
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19
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20
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Nie Y, Gao H, Wu Y, Hu W. Thermodynamics of strain-induced crystallization of random copolymers. SOFT MATTER 2014; 10:343-347. [PMID: 24652114 DOI: 10.1039/c3sm52465e] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Industrial semi-crystalline polymers contain various kinds of sequence defects, which behave like non-crystallizable comonomer units on random copolymers. We performed dynamic Monte Carlo simulations of strain-induced crystallization of random copolymers with various contents of comonomers at high temperatures. We observed that the onset strains of crystallization shift up with the increase of comonomer contents and temperatures. The behaviors can be predicted well by a combination of Flory's theories on the melting-point shifting-down of random copolymers and on the melting-point shifting-up of strain-induced crystallization. Our thermodynamic results are fundamentally important for us to understand the rubber strain-hardening, the plastic molding, the film stretching as well as the fiber spinning.
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Affiliation(s)
- Yijing Nie
- Department of Polymer Science and Engineering, State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China.
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21
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Gao H, Vadlamudi M, Alamo RG, Hu W. Monte Carlo Simulations of Strong Memory Effect of Crystallization in Random Copolymers. Macromolecules 2013. [DOI: 10.1021/ma400842h] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Huanhuan Gao
- Department
of Polymer Science
and Engineering, State Key Laboratory of Coordination Chemistry, School
of Chemistry and Chemical Engineering, Nanjing University, Nanjing, China 210093
| | - Madhavi Vadlamudi
- Department of Chemical and Biomedical
Engineering, FAMU/FSU College of Engineering, Tallahassee, Florida 32310-6046, United States
| | - Rufina G. Alamo
- Department of Chemical and Biomedical
Engineering, FAMU/FSU College of Engineering, Tallahassee, Florida 32310-6046, United States
| | - Wenbing Hu
- Department
of Polymer Science
and Engineering, State Key Laboratory of Coordination Chemistry, School
of Chemistry and Chemical Engineering, Nanjing University, Nanjing, China 210093
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22
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Mao Y, Zuo F, Keum JK, Hsiao BS, Thurman DW, Tsou AH. Crystallization behavior of isotactic propylene-1-hexene random copolymer revealed by time-resolved SAXS/WAXD techniques. ACTA ACUST UNITED AC 2009. [DOI: 10.1002/polb.21840] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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23
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24
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Davis JR, Panagiotopoulos AZ. Orientational bonding model for temperature dependent micellization and solubility of diblock surfactants. J Chem Phys 2009; 131:114901. [DOI: 10.1063/1.3227905] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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25
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Dasmahapatra AK, Nanavati H, Kumaraswamy G. Polymer crystallization in the presence of “sticky” additives. J Chem Phys 2009; 131:074905. [DOI: 10.1063/1.3174449] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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26
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Du ZX, Xu JT, Dong Q, Fan ZQ. Thermal fractionation and effect of comonomer distribution on the crystal structure of ethylene–propylene copolymers. POLYMER 2009. [DOI: 10.1016/j.polymer.2009.04.006] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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27
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Zarycz N, Botek E, Champagne B, Sciannaméa V, Jérôme C, Detrembleur C. Joint Theoretical Experimental Investigation of the Electron Spin Resonance Spectra of Nitroxyl Radicals: Application to Intermediates in in Situ Nitroxide Mediated Polymerization (in Situ NMP) of Vinyl Monomers. J Phys Chem B 2008; 112:10432-42. [DOI: 10.1021/jp803552x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Natalia Zarycz
- Laboratoire de Chimie Théorique Appliquée, Facultés Universitaires Notre-Dame de la Paix, rue de Bruxelles, 61, B-5000 Namur, Belgium, Departamento de Física, Universidad Nacional del Nordeste, 3400 Corrientes, Argentina, and Center for Education and Research on Macromolecules (CERM), University of Liège, Sart-Tilman, B6, B-4000 Liège, Belgium
| | - Edith Botek
- Laboratoire de Chimie Théorique Appliquée, Facultés Universitaires Notre-Dame de la Paix, rue de Bruxelles, 61, B-5000 Namur, Belgium, Departamento de Física, Universidad Nacional del Nordeste, 3400 Corrientes, Argentina, and Center for Education and Research on Macromolecules (CERM), University of Liège, Sart-Tilman, B6, B-4000 Liège, Belgium
| | - Benoît Champagne
- Laboratoire de Chimie Théorique Appliquée, Facultés Universitaires Notre-Dame de la Paix, rue de Bruxelles, 61, B-5000 Namur, Belgium, Departamento de Física, Universidad Nacional del Nordeste, 3400 Corrientes, Argentina, and Center for Education and Research on Macromolecules (CERM), University of Liège, Sart-Tilman, B6, B-4000 Liège, Belgium
| | - Valérie Sciannaméa
- Laboratoire de Chimie Théorique Appliquée, Facultés Universitaires Notre-Dame de la Paix, rue de Bruxelles, 61, B-5000 Namur, Belgium, Departamento de Física, Universidad Nacional del Nordeste, 3400 Corrientes, Argentina, and Center for Education and Research on Macromolecules (CERM), University of Liège, Sart-Tilman, B6, B-4000 Liège, Belgium
| | - Christine Jérôme
- Laboratoire de Chimie Théorique Appliquée, Facultés Universitaires Notre-Dame de la Paix, rue de Bruxelles, 61, B-5000 Namur, Belgium, Departamento de Física, Universidad Nacional del Nordeste, 3400 Corrientes, Argentina, and Center for Education and Research on Macromolecules (CERM), University of Liège, Sart-Tilman, B6, B-4000 Liège, Belgium
| | - Christophe Detrembleur
- Laboratoire de Chimie Théorique Appliquée, Facultés Universitaires Notre-Dame de la Paix, rue de Bruxelles, 61, B-5000 Namur, Belgium, Departamento de Física, Universidad Nacional del Nordeste, 3400 Corrientes, Argentina, and Center for Education and Research on Macromolecules (CERM), University of Liège, Sart-Tilman, B6, B-4000 Liège, Belgium
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Ma Y, Hu W, Wang H. Polymer immiscibility enhanced by thermal fluctuations toward crystalline order. PHYSICAL REVIEW. E, STATISTICAL, NONLINEAR, AND SOFT MATTER PHYSICS 2007; 76:031801. [PMID: 17930263 DOI: 10.1103/physreve.76.031801] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2007] [Revised: 05/31/2007] [Indexed: 05/25/2023]
Abstract
We report dynamic Monte Carlo simulations of binary polymer blends. The blends exhibit liquid-liquid phase separation influenced by the nearby crystallization of one component. We found that both binodal and spinodal boundaries of liquid-liquid phase separation shift up above the predictions of the mean-field lattice theory. The enhancement of immiscibility can be assigned to the thermal fluctuations toward better parallel order of the crystallizable chains in the blends, which has been neglected in the mean-field theory. This result serves as a theoretical background to explain the related experimental observations.
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Affiliation(s)
- Yu Ma
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, State Key Laboratory of Coordination Chemistry, Nanjing University, 210093 Nanjing, China
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29
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Li L, Meng F, Zhong Z, Byelov D, de Jeu WH, Feijen J. Morphology of a highly asymmetric double crystallizable poly(epsilon-caprolactone-b-ethylene oxide) block copolymer. J Chem Phys 2007; 126:024904. [PMID: 17228970 DOI: 10.1063/1.2405357] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The morphology of a highly asymmetric double crystallizable poly(epsilon-caprolactone-b-ethylene oxide) (PCL-b-PEO) block copolymer has been studied with in situ simultaneously small and wide-angle x-ray scattering as well as atomic force microscopy. The molecular masses Mn of the PCL and PEO blocks are 24,000 and 5800, respectively. X-ray scattering and rheological measurements indicate that no microphase separation occurs in the melt. Decreasing the temperature simultaneously triggers off a crystallization of PCL and microphase separation between the PCL and PEO blocks. Coupling and competition between microphase separation and crystallization results in a morphology of PEO spheres surrounded by PCL partially crystallized in lamella. Further decreasing temperature induces the crystallization of PEO spheres, which have a preferred orientation due to the confinements from hard PCL crystalline lamella and from soft amorphous PCL segments in different sides. The final morphology of this highly asymmetric block copolymer is similar to the granular morphology reported for syndiotactic polypropylene and other (co-) polymers. This implies a similar underlying mechanism of coupling and competition of various phase transitions, which is worth further exploration.
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Affiliation(s)
- Liangbin Li
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Anhui 230026, China.
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30
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Hu W, Karssenberg F, Mathot VB. How the restriction of sliding diffusion of comonomers affects crystallization and melting of homogeneous copolymers. POLYMER 2006. [DOI: 10.1016/j.polymer.2005.02.134] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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31
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Flores A, Mathot V, Michler G, Adhikari R, Baltá Calleja F. Novel aspects of microindentation hardness in very low crystallinity ethylene-1-octene copolymers: A model for deformation. POLYMER 2006. [DOI: 10.1016/j.polymer.2004.12.065] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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32
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Karssenberg FG, Mathot VBF, Zwartkruis TJG. Chain microstructure of homogeneous ethylene-1-alkene copolymers and characteristics of single site catalysts using a direct 13C NMR peak method I. Theory and models. ACTA ACUST UNITED AC 2006. [DOI: 10.1002/polb.20583] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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33
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Mattice WL, Helfer CA, Rane SS, Von Meerwall ED, Farmer BL. Some mechanisms for subtle influences of stereochemical composition on the physical properties of macromolecules. ACTA ACUST UNITED AC 2005. [DOI: 10.1002/polb.20411] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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34
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Hu W, Mathot VBF. Sequence-Length Segregation during Crystallization and Melting of a Model Homogeneous Copolymer. Macromolecules 2003. [DOI: 10.1021/ma034755c] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Wenbing Hu
- FOM Institute for Atomic and Molecular Physics, Kruislaan 407, 1098 SJ Amsterdam, The Netherlands, and DSM Research, P.O. Box 18 Geleen, The Netherlands
| | - Vincent B. F. Mathot
- FOM Institute for Atomic and Molecular Physics, Kruislaan 407, 1098 SJ Amsterdam, The Netherlands, and DSM Research, P.O. Box 18 Geleen, The Netherlands
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Hu W, Mathot VBF. Liquid–liquid demixing in a binary polymer blend driven solely by the component-selective crystallizability. J Chem Phys 2003. [DOI: 10.1063/1.1619935] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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