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Shi Y, Li J, Li H, Zhang B, Christiansen JDC, Yu D, Jiang S. Melt memory in random ethylene-1-alkene copolymers. SOFT MATTER 2024; 20:4270-4281. [PMID: 38757237 DOI: 10.1039/d4sm00225c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2024]
Abstract
Chain flexibility or stiffness based polymer conformation plays a crucial role in affecting the dynamics and kinetics of polymers, which is related to the hierarchical architecture of chains. A series of random copolymers of ethylene and 1-alkenes including 1-hexene, 1-octene, and 1-dodecene were synthesized with metallocene catalysts. The crystallization behavior and memory effect in random ethylene-1-alkene copolymers with different side groups were investigated via differential scanning calorimetry (DSC) and wide-angle X-ray scattering (WAXS). Rheological tests were performed for understanding their dynamical behavior. The results show that the melting peak and the viscosity decrease but the orthorhombic crystal dimensions increase with co-unit contents increasing in the copolymers. It was found that the scaling relationship between the zero shear viscosity (η0) and molecular weight (Mn) of the copolymers containing ethylene-1-hexene and ethylene-1-octene is 3.6, which is higher than the classical scaling value of 3.4. The memory of crystals in the melt is enhanced with the increase of 1-alkene contents but is independent of the types of 1-alkenes. The enhanced melt memory effect in the copolymers was proposed due to the effect of the 1-alkene based side groups on the dynamics of polymer chains. The present work would be helpful to understand the chain stiffness based polymer dynamics and processing of polyolefins and copolymers prepared with the metallocene catalyst.
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Affiliation(s)
- Yunxiang Shi
- School of Materials Science and Engineering, Tianjin University, Tianjin 300072, P. R. China.
| | - Jingqing Li
- School of Materials Science and Engineering, Tianjin University, Tianjin 300072, P. R. China.
| | - Hongfei Li
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, P. R. China.
| | - Bin Zhang
- School of Materials Science & Engineering, Zhengzhou University, Zhengzhou 450001, P. R. China.
| | | | - Donghong Yu
- Department of Chemistry and Bioscience, Aalborg University, DK-9220, Aalborg East, Denmark.
| | - Shichun Jiang
- School of Materials Science and Engineering, Tianjin University, Tianjin 300072, P. R. China.
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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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3
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Competition of memory effect and thermal degradation on the crystallization behavior of polyphenylene sulfide. POLYMER 2022. [DOI: 10.1016/j.polymer.2022.125427] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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4
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Dong Y, Wu J, Hu J, Yan S, Müller AJ, Sun X. Thermal-Field-Tuned Heterogeneous Amorphous States of Poly(vinylidene fluoride) Films with Precise Transition from Nonpolar to Polar Phase. Macromolecules 2022. [DOI: 10.1021/acs.macromol.2c01753] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yufei Dong
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, North Third Ring Road 15, Beijing100029, China
| | - Jinghua Wu
- Key Laboratory of Rubber-Plastics of Ministry of Education, Shandong Provincial Key Laboratory of Rubber-Plastics, Qingdao University of Science & Technology, No. 53 Zhengzhou Road, Qingdao266042, China
| | - Jian Hu
- Key Laboratory of Rubber-Plastics of Ministry of Education, Shandong Provincial Key Laboratory of Rubber-Plastics, Qingdao University of Science & Technology, No. 53 Zhengzhou Road, Qingdao266042, China
| | - Shouke Yan
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, North Third Ring Road 15, Beijing100029, China
- Key Laboratory of Rubber-Plastics of Ministry of Education, Shandong Provincial Key Laboratory of Rubber-Plastics, Qingdao University of Science & Technology, No. 53 Zhengzhou Road, Qingdao266042, China
| | - Alejandro J. Müller
- POLYMAT and Department of Polymers and Advanced Materials: Physics, Chemistry and Technology, University of the Basque Country UPV/EHU, Paseo Manuel de Lardizábal 3, 20018Donostia-San Sebastián, Spain
- IKERBASQUE, Basque Foundation for Science, Plaza Euskadi 5, 48009Bilbao, Spain
| | - Xiaoli Sun
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, North Third Ring Road 15, Beijing100029, China
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Kashif M, Li H, Rasul S, Athir N, Liu Y. The formation of highly stable form of isotactic polybutene-1 electrospun membrane via self-seeding. POLYMER 2022. [DOI: 10.1016/j.polymer.2022.125230] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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6
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Lou Y, Li W, Qv C, Zhao R, Ma Z. Strong memory effect in higher α-olefin homopolymers with crystalline side chains. POLYMER 2022. [DOI: 10.1016/j.polymer.2022.124732] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Qv CJ, Li W, Zhao RJ, Ma Z. Memory Effect of Crystallization in 1-Butene/α-olefin Copolymers. CHINESE JOURNAL OF POLYMER SCIENCE 2022. [DOI: 10.1007/s10118-022-2660-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Liu Y, Wang Y, Zhang H, Wu Y, Zhao S, Li Q, Shao C, Wang Z. Toughening of polybutene-1 with form I′ induced by rapid pressurization. CrystEngComm 2022. [DOI: 10.1039/d1ce01228b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Combined with in situ wide angle X-ray diffraction, the mechanical properties of polybutene-1 with rapid pressurization are investigated. The toughness of polybutene-1 can be improved significantly by forms I/I′ produced by rapid pressurization.
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Affiliation(s)
- Yanping Liu
- National Center for International Joint Research of Micro-nano Molding Technology, School of Mechanics and Engineering Science, Zhengzhou University, Zhengzhou, 450001, China
| | - Yingchao Wang
- National Center for International Joint Research of Micro-nano Molding Technology, School of Mechanics and Engineering Science, Zhengzhou University, Zhengzhou, 450001, China
| | - Hongyu Zhang
- National Center for International Joint Research of Micro-nano Molding Technology, School of Mechanics and Engineering Science, Zhengzhou University, Zhengzhou, 450001, China
| | - Yuewen Wu
- National Center for International Joint Research of Micro-nano Molding Technology, School of Mechanics and Engineering Science, Zhengzhou University, Zhengzhou, 450001, China
| | - Shuo Zhao
- National Center for International Joint Research of Micro-nano Molding Technology, School of Mechanics and Engineering Science, Zhengzhou University, Zhengzhou, 450001, China
| | - Qian Li
- National Center for International Joint Research of Micro-nano Molding Technology, School of Mechanics and Engineering Science, Zhengzhou University, Zhengzhou, 450001, China
| | - Chunguang Shao
- National Engineering Research Center for Advanced Polymer Processing Technology, Key Laboratory of Materials Processing and Mold, Zhengzhou University, Zhengzhou, 450002, China
| | - Zhen Wang
- National Engineering Research Center for Advanced Polymer Processing Technology, Key Laboratory of Materials Processing and Mold, Zhengzhou University, Zhengzhou, 450002, China
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Yue Y, Sha X, Wang F, Gao Y, Zhang L, Wang X, Feng J. The effect of β-nucleating agent on the self-nucleation of isotactic polypropylene. POLYMER 2021. [DOI: 10.1016/j.polymer.2021.124009] [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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10
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Liu X, Yu W. Weak Shear-Induced Slowdown in Crystallization of Less-Entangled Poly(ε-caprolactone). Macromolecules 2021. [DOI: 10.1021/acs.macromol.1c00204] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Xiang Liu
- Advanced Rheology Institute, Department of Polymer Science and Engineering, Shanghai Key Laboratory of Electrical Insulation and Thermal Ageing, State Key Laboratory for Metal Matrix Composite Materials, Shanghai Jiao Tong University, Shanghai 200240, P.R. China
| | - Wei Yu
- Advanced Rheology Institute, Department of Polymer Science and Engineering, Shanghai Key Laboratory of Electrical Insulation and Thermal Ageing, State Key Laboratory for Metal Matrix Composite Materials, Shanghai Jiao Tong University, Shanghai 200240, P.R. China
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Wang X, Yi J, Wang L, Yuan Y, Feng J. Thermorheological evidence and structure of heterogeneity in syndiotactic polypropylene melts with strong memory effects. POLYMER 2021. [DOI: 10.1016/j.polymer.2021.123484] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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12
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Dong B, Yang X, Ji Y, Su F, Shao C, Liu C. Polymorph selection during melt crystallization of the isotactic polybutene-1 homopolymer depending on the melt state and crystallization pressure. SOFT MATTER 2020; 16:9074-9082. [PMID: 32909580 DOI: 10.1039/d0sm01231a] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
This work investigated the crystalline forms obtained from melt crystallization in the isotactic polybutene-1 (iPB-1) homopolymer via manipulation of the temperature at which samples were melted (Tmelt) and crystallization pressure (Pcry). Unlike the results under atmospheric conditions where the molten sample crystallized into the pure form II and the crystallization temperature and kinetics were affected obviously by Tmelt, the melted sample crystallized into forms II or I' under high pressure, depending on Tmelt and Pcry. The content of form I' decreases with increasing Tmelt or decreasing Pcry. Meanwhile, the critical pressure for the formation of pure form I' increases with increasing Tmelt. The formation of form I' is attributed to the memory effect of the melt which preserved some ordered sequence of crystal and the high pressure (Pcry) which suppressed the nucleation and growth of the kinetically favored form II, which results in the formation of form I'. In addition, the melt crystallized form II transforms to form I under high pressure conditions; thus forms I, I' and II are observed. The relative contents of the three crystalline forms on samples for different Tmelt and Pcry are obtained in this work. The result shows that the crystalline forms in melt crystallization of iPB-1 can be customized by regulating the melt state and crystallization conditions.
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Affiliation(s)
- Beibei Dong
- National Engineering Research Center for Advanced Polymer Processing Technology, The Key Laboratory of Material Processing and Mold of Ministry of Education, College of Materials Science and Engineering, Zhengzhou University, Zhengzhou, 450002, China.
| | - Xiaokang Yang
- National Engineering Research Center for Advanced Polymer Processing Technology, The Key Laboratory of Material Processing and Mold of Ministry of Education, College of Materials Science and Engineering, Zhengzhou University, Zhengzhou, 450002, China.
| | - Youxin Ji
- National Engineering Research Center for Advanced Polymer Processing Technology, The Key Laboratory of Material Processing and Mold of Ministry of Education, College of Materials Science and Engineering, Zhengzhou University, Zhengzhou, 450002, China.
| | - Fengmei Su
- National Engineering Research Center for Advanced Polymer Processing Technology, The Key Laboratory of Material Processing and Mold of Ministry of Education, College of Materials Science and Engineering, Zhengzhou University, Zhengzhou, 450002, China.
| | - Chunguang Shao
- National Engineering Research Center for Advanced Polymer Processing Technology, The Key Laboratory of Material Processing and Mold of Ministry of Education, College of Materials Science and Engineering, Zhengzhou University, Zhengzhou, 450002, China.
| | - Chuntai Liu
- National Engineering Research Center for Advanced Polymer Processing Technology, The Key Laboratory of Material Processing and Mold of Ministry of Education, College of Materials Science and Engineering, Zhengzhou University, Zhengzhou, 450002, China.
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Affiliation(s)
- Leire Sangroniz
- POLYMAT and Polymer Science and Technology Department, Faculty of Chemistry, University of the Basque Country UPV/EHU, Paseo Manuel de Lardizábal, 3, 20018 Donostia-San Sebastián, Spain
| | - Dario Cavallo
- Department of Chemistry and Industrial Chemistry, University of Genova, via Dodecaneso, 31, 16146 Genova, Italy
| | - Alejandro J. Müller
- POLYMAT and Polymer Science and Technology Department, Faculty of Chemistry, University of the Basque Country UPV/EHU, Paseo Manuel de Lardizábal, 3, 20018 Donostia-San Sebastián, Spain
- IKERBASQUE - Basque Foundation for Science, Bilbao, Spain
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14
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Yan P, Yang F, Xiang M, Wu T, Fu Q. New insights into the memory effect on the crystallization behavior of poly(phenylene sulfide). POLYMER 2020. [DOI: 10.1016/j.polymer.2020.122439] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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15
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Influence of Steric Norbornene Co-units on the Crystallization and Memory Effect of Polybutene-1 Copolymers. Macromolecules 2020. [DOI: 10.1021/acs.macromol.0c00078] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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16
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Liu P, Xue Y, Men Y. Formation and stabilization of crystal nuclei in isotactic polybutene-1 aged below glass transition temperature. POLYMER 2020. [DOI: 10.1016/j.polymer.2020.122293] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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17
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Chen Q, Chen D, Kang J, Cao Y, Chen J. Structure Evolution of Polyethylene in Sequential Biaxial Stretching along the First Tensile Direction. Ind Eng Chem Res 2019. [DOI: 10.1021/acs.iecr.9b01733] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Qiang Chen
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, No.24 South Section 1, Yihuan Road, Chengdu, 610065, P. R. China
| | - Dandan Chen
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, No.24 South Section 1, Yihuan Road, Chengdu, 610065, P. R. China
| | - Jian Kang
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, No.24 South Section 1, Yihuan Road, Chengdu, 610065, P. R. China
| | - Ya Cao
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, No.24 South Section 1, Yihuan Road, Chengdu, 610065, P. R. China
| | - Jinyao Chen
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, No.24 South Section 1, Yihuan Road, Chengdu, 610065, P. R. China
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