1
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Cai M, He X, Liu B. Revealing the Effect of the Molecular Weight Distribution on the Chain Diffusion and Crystallization Process under a Branched Trimodal Polyethylene System. Polymers (Basel) 2024; 16:265. [PMID: 38257063 PMCID: PMC10818820 DOI: 10.3390/polym16020265] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2023] [Revised: 01/15/2024] [Accepted: 01/15/2024] [Indexed: 01/24/2024] Open
Abstract
With the increasing demand for high-end materials, trimodal polyethylene (PE) has become a research hotspot in recent years due to its superior performance compared with bimodal PE. By means of molecular dynamics (MD) simulations, we aim to expound the effect of the molecular weight distribution (MWD) on the mechanism of nucleation and crystallization of trimodal PE. The crystallization rate is faster when short-chain branching is distributed on a single backbone compared to that on two backbones. In addition, as the content of high molecular weight backbone decreases, the time required for nucleation decreases, but the crystallization rate slows down. This is because low molecular weight backbones undergo intra-chain nucleation and crystallize earlier due to the high diffusion capacity, which leads to entanglement that prevents the movement of medium or high molecular weight backbones. Furthermore, crystallized short backbones hinder the movement and crystallization of other backbones. What is more, a small increase in the high molecular weight branched backbone of trimodal PE can make the crystallinity greater than that of bimodal PE, but when the content of high molecular weight backbone is too high, the crystallinity decreases instead, because the contribution of short and medium backbones to high crystallinity is greater than that of long backbones.
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Affiliation(s)
- Min Cai
- State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Meilong Road 130, Shanghai 200237, China;
| | - Xuelian He
- State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Meilong Road 130, Shanghai 200237, China;
| | - Boping Liu
- College of Materials and Energy, South China Agricultural University, Guangzhou 510642, China
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2
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Lunzhi L, Jinghui G, Lisheng Z, Kai Z, Xiaohan Z. Aging phenomena in non-crosslinked polyolefin blend cable insulation material: Electrical treeing and thermal aging. Front Chem 2022; 10:903986. [PMID: 36426100 PMCID: PMC9679882 DOI: 10.3389/fchem.2022.903986] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2022] [Accepted: 10/21/2022] [Indexed: 11/11/2022] Open
Abstract
Non-crosslinked polyolefin blends have become a favorable alternative material to crosslinked polyethylene (XLPE) cable insulation owing to their low power consumption in the production process and good recyclability at the end of service life. Although studies on non-crosslinked materials have achieved significant results, the electrical and thermal aging properties of these materials undeniably need extensive research attention and systematic exploration. Aging performance is directly related to the lifetime and reliability of cables. In this study, the electrical treeing and thermal aging phenomena of 70 wt.% linear low-density polyethylene (LLDPE) and 30 wt.% high-density polyethylene (HDPE) blends (abbreviated as 70L–30H) were studied and compared with those of XLPE by investigating the microstructural feature, electrical treeing behavior, and mechanical performance during thermal aging. Electrical treeing tests show that 70L–30H blends exhibited smaller treeing dimensions and lower electrical tree growth rates than those of XLPE. Thermal aging tests exhibit that the mechanical property degradation of 70L–30H blends is less than that of XLPE under the same aging time. Through differential scanning calorimetry analysis and microstructure observation, the 70L–30H blend shows higher melting temperature, thicker lamellae, and higher crystallinity with a uniform and fine spherulite structure, which are responsible for good anti-aging performance. This study indicates that the blends exhibit better electrical and thermal aging resistance than XLPE, which provides a performance guarantee for its further application in the non-crosslinked cable system.
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Affiliation(s)
- Li Lunzhi
- School of Electronic and Control Engineering, Chang’an University, Xi’an, China
- State Key Laboratory of Electrical Insulation and Power Equipment, Xi’an Jiaotong University, Xi’an, China
| | - Gao Jinghui
- State Key Laboratory of Electrical Insulation and Power Equipment, Xi’an Jiaotong University, Xi’an, China
- *Correspondence: Gao Jinghui, ; Zhong Lisheng,
| | - Zhong Lisheng
- State Key Laboratory of Electrical Insulation and Power Equipment, Xi’an Jiaotong University, Xi’an, China
- *Correspondence: Gao Jinghui, ; Zhong Lisheng,
| | - Zhang Kai
- State Key Laboratory of Electrical Insulation and Power Equipment, Xi’an Jiaotong University, Xi’an, China
| | - Zhao Xiaohan
- School of Electronic and Control Engineering, Chang’an University, Xi’an, China
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3
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Jani F, Sepahi A, Afzali SK, Houshmand Moayed S. Experimental study on the effect of molecular weight and chemical composition distribution on the mechanical response of high‐density polyethylene. POLYM ENG SCI 2022. [DOI: 10.1002/pen.26196] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Farzad Jani
- Department of Research and Development Jam Petrochemical Company Asaluyeh Iran
| | - Abdolhannan Sepahi
- Department of Research and Development Jam Petrochemical Company Asaluyeh Iran
| | - Seyyed Kamal Afzali
- Department of Research and Development Jam Petrochemical Company Asaluyeh Iran
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4
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Liu J, Fan K, Li X, Qin R, Wang X, Liu X, Liu X. Brand-New Method toward Widely Regulating Polymer Dispersity by Two-Dimensional Confining Radical Polymerization. Ind Eng Chem Res 2022. [DOI: 10.1021/acs.iecr.2c02231] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jiaxiang Liu
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Material and Engineering, Sichuan University, Chengdu 610065, P. R. China
| | - Kun Fan
- College of Electrical Engineering, Sichuan University, Chengdu 610065, China
| | - Xin Li
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Material and Engineering, Sichuan University, Chengdu 610065, P. R. China
| | - Rui Qin
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Material and Engineering, Sichuan University, Chengdu 610065, P. R. China
| | - Xu Wang
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Material and Engineering, Sichuan University, Chengdu 610065, P. R. China
| | - Xikui Liu
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Material and Engineering, Sichuan University, Chengdu 610065, P. R. China
| | - Xiangyang Liu
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Material and Engineering, Sichuan University, Chengdu 610065, P. R. China
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5
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Jandaghian MH, Maddah Y, Sepahi A, Houshmandmoayed S, Nikzinat E, Masoori M, Afzali K, Rashedi R. Effects of polymerization parameters on the slow crack growth resistance and rheological properties of bimodal polyethylene resins. J Appl Polym Sci 2022. [DOI: 10.1002/app.51867] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Mohammad Hossein Jandaghian
- Department of Polymer Engineering and Color Technology Amirkabir University of Technology Tehran Iran
- Research and Development Center Jam Petrochemical Company Bushehr Iran
| | - Yasaman Maddah
- Department of Polymer Engineering and Color Technology Amirkabir University of Technology Tehran Iran
- Research and Development Center Jam Petrochemical Company Bushehr Iran
| | | | | | - Ehsan Nikzinat
- Department of Polymer Engineering and Color Technology Amirkabir University of Technology Tehran Iran
- Research and Development Center Jam Petrochemical Company Bushehr Iran
| | - Maryam Masoori
- Research and Development Center Jam Petrochemical Company Bushehr Iran
| | - Kamal Afzali
- Research and Development Center Jam Petrochemical Company Bushehr Iran
| | - Reza Rashedi
- Department of Polymer Engineering and Color Technology Amirkabir University of Technology Tehran Iran
- Research and Development Center Jam Petrochemical Company Bushehr Iran
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6
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Kida T, Kimura T, Eno A, Janchai K, Yamaguchi M, Otsuki Y, Kimura T, Mizukawa T, Murakami T, Hato K, Okawa T. Effect of Ultra-High-Molecular-Weight Molecular Chains on the Morphology, Crystallization, and Mechanical Properties of Polypropylene. Polymers (Basel) 2021; 13:4222. [PMID: 34883725 PMCID: PMC8659738 DOI: 10.3390/polym13234222] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2021] [Revised: 11/25/2021] [Accepted: 11/27/2021] [Indexed: 01/01/2023] Open
Abstract
The effects of the ultra-high-molecular-weight (UHMW) component of polypropylene (PP) on its rheological properties, crystallization behavior, and solid-state mechanical properties were investigated using various measurement techniques. The terminal relaxation time-determined by measuring the linear viscoelasticity-was increased by adding the UHMW component. The increase in the melt elasticity produced by adding the UHMW component was observed by measuring the steady-state shear flow, although the shear viscosity was not greatly affected. Owing to the long characteristic time of the Rouse relaxation of the UHMW component, PP with the UHMW component formed highly oriented structures through a shear-induced crystallization process. The addition of the UHMW component enhanced the orientation and regularity of crystalline structure for extruded films. Therefore, the Young's modulus, yield stress, and strength were higher in the PP film containing the UHMW component than in one without the UHMW component, irrespective of the direction of tensile deformation.
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Affiliation(s)
- Takumitsu Kida
- Japan Advanced Institute of Science and Technology, School of Materials Science, 1-1 Asahidai, Nomi 9231292, Japan; (T.K.); (A.E.); (K.J.); (M.Y.)
| | - Takeyoshi Kimura
- Japan Advanced Institute of Science and Technology, School of Materials Science, 1-1 Asahidai, Nomi 9231292, Japan; (T.K.); (A.E.); (K.J.); (M.Y.)
| | - Ayaka Eno
- Japan Advanced Institute of Science and Technology, School of Materials Science, 1-1 Asahidai, Nomi 9231292, Japan; (T.K.); (A.E.); (K.J.); (M.Y.)
| | - Khunanya Janchai
- Japan Advanced Institute of Science and Technology, School of Materials Science, 1-1 Asahidai, Nomi 9231292, Japan; (T.K.); (A.E.); (K.J.); (M.Y.)
- Petrochemical and Polymer Science, Faculty of Science, Chulalongkorn University, Pathumwan, Bangkok 10330, Thailand
| | - Masayuki Yamaguchi
- Japan Advanced Institute of Science and Technology, School of Materials Science, 1-1 Asahidai, Nomi 9231292, Japan; (T.K.); (A.E.); (K.J.); (M.Y.)
| | - Yasuhiko Otsuki
- Packaging and Industrial Materials Laboratory, Prime Polymer Co., Ltd., 3 Chigusa-Kaigan, Ichihara 2990108, Japan; (Y.O.); (T.K.); (T.M.); (T.M.); (K.H.); (T.O.)
| | - Tokutaro Kimura
- Packaging and Industrial Materials Laboratory, Prime Polymer Co., Ltd., 3 Chigusa-Kaigan, Ichihara 2990108, Japan; (Y.O.); (T.K.); (T.M.); (T.M.); (K.H.); (T.O.)
| | - Tomoaki Mizukawa
- Packaging and Industrial Materials Laboratory, Prime Polymer Co., Ltd., 3 Chigusa-Kaigan, Ichihara 2990108, Japan; (Y.O.); (T.K.); (T.M.); (T.M.); (K.H.); (T.O.)
| | - Tomoya Murakami
- Packaging and Industrial Materials Laboratory, Prime Polymer Co., Ltd., 3 Chigusa-Kaigan, Ichihara 2990108, Japan; (Y.O.); (T.K.); (T.M.); (T.M.); (K.H.); (T.O.)
| | - Kazuki Hato
- Packaging and Industrial Materials Laboratory, Prime Polymer Co., Ltd., 3 Chigusa-Kaigan, Ichihara 2990108, Japan; (Y.O.); (T.K.); (T.M.); (T.M.); (K.H.); (T.O.)
| | - Tomoya Okawa
- Packaging and Industrial Materials Laboratory, Prime Polymer Co., Ltd., 3 Chigusa-Kaigan, Ichihara 2990108, Japan; (Y.O.); (T.K.); (T.M.); (T.M.); (K.H.); (T.O.)
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7
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Liao T, Yang X, Zhao X, Tang Y, Jiang Z, Men Y. Gaussian and Non-Gaussian Distributions of Fracture Properties in Tensile Stretching of High-Density Polyethylene. Macromolecules 2021. [DOI: 10.1021/acs.macromol.1c00944] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- Tao Liao
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Renmin Street 5625, Changchun 130022, China
| | - Xiao Yang
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Renmin Street 5625, Changchun 130022, China
- University of Science and Technology of China, Hefei 230026, China
| | - Xintong Zhao
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Renmin Street 5625, Changchun 130022, China
- University of Science and Technology of China, Hefei 230026, China
| | - Yujing Tang
- Sinopec Beijing Research Institute of Chemical Industry, Beijing 100013, China
| | - Zhiyong Jiang
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Renmin Street 5625, Changchun 130022, China
| | - 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
- University of Science and Technology of China, Hefei 230026, China
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8
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Abedini A, Shafiei M, Jamjah R, Ghasemi I. In situ polymerization of ethylene in the presence of graphene by α‐diimine Nickel (II)/MAO catalyst system: Thermal and rheological study. Appl Organomet Chem 2021. [DOI: 10.1002/aoc.6244] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Ali Abedini
- Department of Polymerization Engineering Iran Polymer and Petrochemical Institute (IPPI) Tehran Iran
| | - Mohammad Shafiei
- Department of Polymer Processing Iran Polymer and Petrochemical Institute (IPPI) Tehran Iran
| | - Roghayeh Jamjah
- Department of Polymerization Engineering Iran Polymer and Petrochemical Institute (IPPI) Tehran Iran
| | - Ismaeil Ghasemi
- Department of Polymer Processing Iran Polymer and Petrochemical Institute (IPPI) Tehran Iran
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9
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Kida T, Tanaka R, Hiejima Y, Nitta KH, Shiono T. Improving the strength of polyethylene solids by simple controlling of the molecular weight distribution. POLYMER 2021. [DOI: 10.1016/j.polymer.2021.123526] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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10
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Ren Y, Sun X, Chen L, Li Y, Sun M, Duan X, Liang W. Structures and impact strength variation of chemically crosslinked high-density polyethylene: effect of crosslinking density. RSC Adv 2021; 11:6791-6797. [PMID: 35423216 PMCID: PMC8694873 DOI: 10.1039/d0ra10365a] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2020] [Accepted: 01/30/2021] [Indexed: 11/21/2022] Open
Abstract
Impact strength of high-density polyethylene (HDPE), especially at low temperature, is crucial for its applications outdoors because of its poor impact strength. In order to improve the impact strength of HDPE, crosslinked HDPE was prepared by the addition of a peroxide crosslink agent, bis(tert-butyldioxyisopropyl)benzenehexane, and the effect of the crosslinking density on the microstructures and mechanical properties, especially impact strength between −60 °C and 23 °C, were investigated. The results show that the crosslinking density is controlled by varying the content of the crosslinking agent. It is found that, at room temperature, with increase in the content of crosslink agent from 0% to 0.5–0.7%, the impact strength increases from 4 kJ m−2 to about 80 kJ m−2 and the elongation at break increases from 20% to about 550%. With further increase in the content of crosslink agent to 1.5%, the impact strength and the elongation at break reduce to 64 kJ m−2 and 360% respectively. With increase in crosslink agent, the flexural modulus, yield strength, crystallinity, mean lamellar thickness, crystal size and spherulitic size and the brittle–ductile transition temperature (BDTT) decrease, and the gel content, impact strength of the HDPE at low temperature, intensity of β transition increase significantly. In considering both the room temperature mechanical properties and low temperature impact strength, the optimized content of the crosslink agent is about 0.7%. Overall, crosslinking significantly improves the toughness and impact strength of HDPE and extends its application, especially at low temperature. Crosslinking significantly improves the toughness and impact strength of HDPE and extends its application, especially at low temperature.![]()
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Affiliation(s)
- Yueqing Ren
- National Institute of Clean-and-Low-Carbon Energy, Future Science City Changping District Beijing 102211 China
| | - Xiaojie Sun
- National Institute of Clean-and-Low-Carbon Energy, Future Science City Changping District Beijing 102211 China
| | - Lanlan Chen
- National Institute of Clean-and-Low-Carbon Energy, Future Science City Changping District Beijing 102211 China
| | - Yafei Li
- National Institute of Clean-and-Low-Carbon Energy, Future Science City Changping District Beijing 102211 China
| | - Miaomiao Sun
- National Institute of Clean-and-Low-Carbon Energy, Future Science City Changping District Beijing 102211 China
| | - Xuelei Duan
- National Institute of Clean-and-Low-Carbon Energy, Future Science City Changping District Beijing 102211 China
| | - Wenbin Liang
- National Institute of Clean-and-Low-Carbon Energy, Future Science City Changping District Beijing 102211 China
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11
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Song J, Li J, Li Z. Molecular dynamics simulations of uniaxial deformation of bimodal polyethylene melts. POLYMER 2021. [DOI: 10.1016/j.polymer.2020.123210] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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12
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Kalantar Mehrjerdi A, Åkesson D, Skrifvars M. Influence of talc fillers on bimodal polyethylene composites for ground heat exchangers. J Appl Polym Sci 2020. [DOI: 10.1002/app.49290] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Adib Kalantar Mehrjerdi
- Swedish Centre for Resource Recovery, Faculty of Textiles, Engineering and Business University of Borås Borås Sweden
| | - Dan Åkesson
- Swedish Centre for Resource Recovery, Faculty of Textiles, Engineering and Business University of Borås Borås Sweden
| | - Mikael Skrifvars
- Swedish Centre for Resource Recovery, Faculty of Textiles, Engineering and Business University of Borås Borås Sweden
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13
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Paredes B, Moreno J, Carrero A, Grieken R. Evaluation of Bimodal Polyethylene from Chromium Oxide/Metallocene Hybrid Catalysts for High Resistance Applications. MACROMOL REACT ENG 2020. [DOI: 10.1002/mren.202000032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Beatriz Paredes
- Department of Chemical and Environmental Technology ESCET Universidad Rey Juan Carlos c/ Tulipan s/n Mostoles Madrid 28933 Spain
| | - Jovita Moreno
- Department of Chemical and Environmental Technology ESCET Universidad Rey Juan Carlos c/ Tulipan s/n Mostoles Madrid 28933 Spain
| | - Alicia Carrero
- Department of Chemical, Energy and Mechanical Technology ESCET Universidad Rey Juan Carlos c/ Tulipan s/n Mostoles Madrid 28933 Spain
| | - Rafael Grieken
- Department of Chemical and Environmental Technology ESCET Universidad Rey Juan Carlos c/ Tulipan s/n Mostoles Madrid 28933 Spain
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14
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Zhai Z, Fusco C, Morthomas J, Perez M, Lame O. Disentangling and Lamellar Thickening of Linear Polymers during Crystallization: Simulation of Bimodal and Unimodal Molecular Weight Distribution Systems. ACS NANO 2019; 13:11310-11319. [PMID: 31593434 DOI: 10.1021/acsnano.9b04459] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
We have performed coarse-grained molecular dynamics simulations to study the isothermal crystallization of bimodal and unimodal molecular weight distribution (MWD) polymers with equivalent average molecular weight (Mw). By using primitive path analysis, we can monitor the entanglement evolution during the process of crystallization. We have discovered a quantitative correlation between the degree of disentanglement and crystallinity, indicating that chain disentanglement permits the process of crystallization. In addition, the crystalline stem length also displays a linear relation with the degree of disentanglement at different temperatures. Based on the observation in our simulations, we can build a scenario of the whole process of chain disentangling and lamellar thickening on the basis of chain sliding diffusion. Furthermore, we have enough evidence to infer that the temperature dependence of crystalline stem length is basically a result of temperature dependence of chain sliding diffusion. Our observations are also in agreement with Hikosaka's sliding diffusion theory. Compared to the unimodal system, the disentanglement degree of the bimodal system is more delayed than its crystallinity due to the slower chain sliding of the long-chain component; the bimodal system reaches a larger crystalline stem length at all temperatures due to the promotion of higher chain sliding mobility of the short-chain component.
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Affiliation(s)
- Zengqiang Zhai
- Univ de Lyon, INSA Lyon , MATEIS, UMR CNRS 5510, 69621 Villeurbanne , France
| | - Claudio Fusco
- Univ de Lyon, INSA Lyon , MATEIS, UMR CNRS 5510, 69621 Villeurbanne , France
| | - Julien Morthomas
- Univ de Lyon, INSA Lyon , MATEIS, UMR CNRS 5510, 69621 Villeurbanne , France
| | - Michel Perez
- Univ de Lyon, INSA Lyon , MATEIS, UMR CNRS 5510, 69621 Villeurbanne , France
| | - Olivier Lame
- Univ de Lyon, INSA Lyon , MATEIS, UMR CNRS 5510, 69621 Villeurbanne , France
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15
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Zhai Z, Morthomas J, Fusco C, Perez M, Lame O. Crystallization and Molecular Topology of Linear Semicrystalline Polymers: Simulation of Uni- and Bimodal Molecular Weight Distribution Systems. Macromolecules 2019. [DOI: 10.1021/acs.macromol.9b00071] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Zengqiang Zhai
- Univ de Lyon, INSA Lyon, MATEIS, UMR CNRS 5510, 69621 Villeurbanne, France
| | - Julien Morthomas
- Univ de Lyon, INSA Lyon, MATEIS, UMR CNRS 5510, 69621 Villeurbanne, France
| | - Claudio Fusco
- Univ de Lyon, INSA Lyon, MATEIS, UMR CNRS 5510, 69621 Villeurbanne, France
| | - Michel Perez
- Univ de Lyon, INSA Lyon, MATEIS, UMR CNRS 5510, 69621 Villeurbanne, France
| | - Olivier Lame
- Univ de Lyon, INSA Lyon, MATEIS, UMR CNRS 5510, 69621 Villeurbanne, France
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16
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Moyassari A, Gkourmpis T, Hedenqvist MS, Gedde UW. Molecular Dynamics Simulations of Short-Chain Branched Bimodal Polyethylene: Topological Characteristics and Mechanical Behavior. Macromolecules 2019. [DOI: 10.1021/acs.macromol.8b01874] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ali Moyassari
- Fibre and Polymer Technology, School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH Royal Institute of Technology, SE-100 44 Stockholm, Sweden
| | - Thomas Gkourmpis
- Innovation & Technology, Borealis AB, SE-444 86 Stenungsund, Sweden
| | - Mikael S. Hedenqvist
- Fibre and Polymer Technology, School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH Royal Institute of Technology, SE-100 44 Stockholm, Sweden
| | - Ulf W. Gedde
- Fibre and Polymer Technology, School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH Royal Institute of Technology, SE-100 44 Stockholm, Sweden
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17
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Molecular dynamics simulation of linear polyethylene blends: Effect of molar mass bimodality on topological characteristics and mechanical behavior. POLYMER 2019. [DOI: 10.1016/j.polymer.2018.12.012] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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18
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Dianat G, Movsesian N, Gupta M. Process–Structure–Property Relationships for Porous Membranes Formed by Polymerization of Solid Monomer by a Vapor-Phase Initiator. Macromolecules 2018. [DOI: 10.1021/acs.macromol.8b02201] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- Golnaz Dianat
- Mork Family Department of Chemical Engineering and Materials Science, University of Southern California, 925 Bloom Walk, Los Angeles, California 90089, United States
| | - Nareh Movsesian
- Mork Family Department of Chemical Engineering and Materials Science, University of Southern California, 925 Bloom Walk, Los Angeles, California 90089, United States
| | - Malancha Gupta
- Mork Family Department of Chemical Engineering and Materials Science, University of Southern California, 925 Bloom Walk, Los Angeles, California 90089, United States
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19
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Li L, Zhong L, Zhang K, Gao J, Xu M. Temperature Dependence of Mechanical, Electrical Properties and Crystal Structure of Polyethylene Blends for Cable Insulation. MATERIALS 2018; 11:ma11101922. [PMID: 30304869 PMCID: PMC6213639 DOI: 10.3390/ma11101922] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/15/2018] [Revised: 09/28/2018] [Accepted: 10/03/2018] [Indexed: 11/17/2022]
Abstract
There is a long-standing puzzle concerning whether polyethylene blends are a suitable substitution for cable-insulation-used crosslinking polyethylene (XLPE) especially at elevated temperatures. In this paper, we investigate temperature dependence of mechanical, electrical properties of blends with 70 wt % linear low density polyethylene (LLDPE) and 30 wt % high density polyethylene (HDPE) (abbreviated as 70 L-30 H). Our results show that the dielectric loss of 70 L-30 H is about an order of magnitude lower than XLPE, and the AC breakdown strength is 22% higher than XLPE at 90 °C. Moreover, the dynamic mechanical thermal analysis (DMA) measurement and hot set tests suggest that the blends shows optimal mechanical properties especially at high temperature with considerable temperature stability. Further scanning electron microscope (SEM) observation and X-ray diffraction (XRD) analysis uncover the reason for the excellent high temperature performance and temperature stability, which can be ascribed to the uniform fine-spherulite structure in 70 L-30 H blends with high crystallinity sustaining at high temperature. Therefore, our findings may enable the potential application of the blends as cable insulation material with higher thermal-endurance ability.
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Affiliation(s)
- Lunzhi Li
- State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an 710049, China.
| | - Lisheng Zhong
- State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an 710049, China.
| | - Kai Zhang
- State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an 710049, China.
| | - Jinghui Gao
- State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an 710049, China.
| | - Man Xu
- State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an 710049, China.
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20
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Sarafpour A, Pircheraghi G, Rashedi R, Afzali K. Correlation between isothermal crystallization and morphological/rheological properties of bimodal polyethylene/carbon black systems. POLYMER CRYSTALLIZATION 2018. [DOI: 10.1002/pcr2.10014] [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)
- Amirhosein Sarafpour
- Polymeric Materials Research Group, Department of Materials Science and EngineeringSharif University of Technology Tehran Iran
| | - Gholamreza Pircheraghi
- Polymeric Materials Research Group, Department of Materials Science and EngineeringSharif University of Technology Tehran Iran
| | - Reza Rashedi
- Research and Development CenterJam Petrochemical Company, South Pars Special Economic Zone (Asalouyeh) Iran
| | - Kamal Afzali
- Research and Development CenterJam Petrochemical Company, South Pars Special Economic Zone (Asalouyeh) Iran
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21
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Sardashti P, Stewart KME, Polak M, Tzoganakis C, Penlidis A. Operational maps between molecular properties and environmental stress cracking resistance. J Appl Polym Sci 2018. [DOI: 10.1002/app.47006] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- P. Sardashti
- Institute for Polymer Research (IPR), Department of Chemical Engineering; University of Waterloo; Waterloo Ontario Canada
| | - K. M. E. Stewart
- Institute for Polymer Research (IPR), Department of Chemical Engineering; University of Waterloo; Waterloo Ontario Canada
- Department of Chemistry and Physics; Troy University; Troy Alabama USA
| | - M. Polak
- Department of Civil and Environmental Engineering; University of Waterloo; Waterloo Ontario Canada
| | - C. Tzoganakis
- Institute for Polymer Research (IPR), Department of Chemical Engineering; University of Waterloo; Waterloo Ontario Canada
| | - A. Penlidis
- Institute for Polymer Research (IPR), Department of Chemical Engineering; University of Waterloo; Waterloo Ontario Canada
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22
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Mileva D, Tranchida D, Gahleitner M. Designing polymer crystallinity: An industrial perspective. POLYMER CRYSTALLIZATION 2018. [DOI: 10.1002/pcr2.10009] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Daniela Mileva
- Borealis Polyolefine GmbH Innovation Headquarters, 4021 Linz Austria
| | - Davide Tranchida
- Borealis Polyolefine GmbH Innovation Headquarters, 4021 Linz Austria
| | - Markus Gahleitner
- Borealis Polyolefine GmbH Innovation Headquarters, 4021 Linz Austria
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23
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24
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Wu BH, Zhong QZ, Xu ZK, Wan LS. Effects of molecular weight distribution on the self-assembly of end-functionalized polystyrenes. Polym Chem 2017. [DOI: 10.1039/c7py00803a] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
The molecular weight distribution of hydroxyl-end-functionalized polystyrenes shows effects on the self-assembly of patterned porous films and the mechanical strength.
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Affiliation(s)
- Bai-Heng Wu
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization
- Department of Polymer Science and Engineering
- Zhejiang University
- Hangzhou 310027
- China
| | - Qi-Zhi Zhong
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization
- Department of Polymer Science and Engineering
- Zhejiang University
- Hangzhou 310027
- China
| | - Zhi-Kang Xu
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization
- Department of Polymer Science and Engineering
- Zhejiang University
- Hangzhou 310027
- China
| | - Ling-Shu Wan
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization
- Department of Polymer Science and Engineering
- Zhejiang University
- Hangzhou 310027
- China
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25
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Li CH, Wang JF, Guo JW, Wu H, Guo SY. The toughening behavior of the PP/POE alternating multilayered blends under EWF and impact tensile methods. CHINESE JOURNAL OF POLYMER SCIENCE 2015. [DOI: 10.1007/s10118-015-1692-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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26
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Müller A, Michell R, Pérez R, Lorenzo A. Successive Self-nucleation and Annealing (SSA): Correct design of thermal protocol and applications. Eur Polym J 2015. [DOI: 10.1016/j.eurpolymj.2015.01.015] [Citation(s) in RCA: 104] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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27
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Mehrabi Mazidi M, Razavi Aghjeh MK. Synergistic toughening effects of dispersed components in PP/PA6/EPDM ternary blends; quantitative analysis of the fracture toughness via the essential work of fracture (EWF) methodology. RSC Adv 2015. [DOI: 10.1039/c5ra07193c] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A synergistic toughening effect of soft EPDM particles and rigid PA6 domains for PP/PA/EPDM ternary blends was observed and the related micromechanisms were proposed.
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Affiliation(s)
- Majid Mehrabi Mazidi
- Institute of Polymeric Materials
- Sahand University of Technology
- Tabriz
- Iran
- Faculty of Polymer Engineering
| | - Mir Karim Razavi Aghjeh
- Institute of Polymeric Materials
- Sahand University of Technology
- Tabriz
- Iran
- Faculty of Polymer Engineering
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28
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Niwa M, Fujii H, Tanaka H. Exceptional free radical polymerization and block copolymerization of captodative substituted methyl 2-methoxyacrylate. Des Monomers Polym 2014. [DOI: 10.1080/15685551.2014.907619] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
Affiliation(s)
- Miki Niwa
- Institute of Technology and Science, University of Tokushima, Minamijosanjima-cho, Tokushima 770-8506, Japan
| | - Hiroyuki Fujii
- Institute of Technology and Science, University of Tokushima, Minamijosanjima-cho, Tokushima 770-8506, Japan
| | - Hitoshi Tanaka
- Institute of Technology and Science, University of Tokushima, Minamijosanjima-cho, Tokushima 770-8506, Japan
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29
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Tourkmani K, Casas E, Paredes B, Moreno J, Perez P, Escola JM, Van Grieken R. Synthesis and Characterization of Low Molecular Weight Ethylene-Propylene Copolymers Prepared Using Metallocene Catalysts. MACROMOL REACT ENG 2014. [DOI: 10.1002/mren.201400021] [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)
- Kenda Tourkmani
- Department of Chemical and Environmental Technology; ESCET; Universidad Rey Juan Carlos; C/Tulipán s/n 28933 Móstoles, Madrid Spain
| | - Emilio Casas
- Department of Chemical and Environmental Technology; ESCET; Universidad Rey Juan Carlos; C/Tulipán s/n 28933 Móstoles, Madrid Spain
| | - Beatriz Paredes
- Department of Chemical and Environmental Technology; ESCET; Universidad Rey Juan Carlos; C/Tulipán s/n 28933 Móstoles, Madrid Spain
| | - Jovita Moreno
- Department of Chemical and Environmental Technology; ESCET; Universidad Rey Juan Carlos; C/Tulipán s/n 28933 Móstoles, Madrid Spain
| | | | - Jose María Escola
- Department of Chemical and Environmental Technology; ESCET; Universidad Rey Juan Carlos; C/Tulipán s/n 28933 Móstoles, Madrid Spain
| | - Rafael Van Grieken
- Department of Chemical and Environmental Technology; ESCET; Universidad Rey Juan Carlos; C/Tulipán s/n 28933 Móstoles, Madrid Spain
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30
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He G, Zhang F, Huang L, Li J, Guo S. Evaluation of the fracture behaviors of multilayered propylene-ethylene copolymer/polypropylene homopolymer composites with the essential work of fracture. J Appl Polym Sci 2014. [DOI: 10.1002/app.40574] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Guansong He
- State Key Laboratory of Polymer Materials Engineering; Polymer Research Institute of Sichuan University; Chengdu 610065 China
| | - Fengshun Zhang
- State Key Laboratory of Polymer Materials Engineering; Polymer Research Institute of Sichuan University; Chengdu 610065 China
| | - Liang Huang
- State Key Laboratory of Polymer Materials Engineering; Polymer Research Institute of Sichuan University; Chengdu 610065 China
| | - Jiang Li
- State Key Laboratory of Polymer Materials Engineering; Polymer Research Institute of Sichuan University; Chengdu 610065 China
| | - Shaoyun Guo
- State Key Laboratory of Polymer Materials Engineering; Polymer Research Institute of Sichuan University; Chengdu 610065 China
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31
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He G, Li J, Zhang F, Lei F, Guo S. A quantitative analysis of the effect of interface delamination on the fracture behavior and toughness of multilayered propylene–ethylene copolymer/low density polyethylene films by the essential work of fracture (EWF). POLYMER 2014. [DOI: 10.1016/j.polymer.2014.01.039] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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32
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Das D, Satapathy BK. Designing tough and fracture resistant polypropylene/multi wall carbon nanotubes nanocomposites by controlling stereo-complexity and dispersion morphology. ACTA ACUST UNITED AC 2014. [DOI: 10.1016/j.matdes.2013.08.067] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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33
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Wu Y, Zhao J, Zhang X, Zhu J, Zhang W, Zhang Z, Zhu X. Zero-valent metal catalyzed removal of thiocarbonylthio end groups from RAFT-made polystyrene: producing controllable bimodal molecular weight distribution. Polym Chem 2014. [DOI: 10.1039/c3py01327h] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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34
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Casas E, Paredes B, Escola JM, Martin C, van Grieken R. Ethylene Polymerization Over Ph 2
C(Cp)(2,7-t-Bu 2
Flu)ZrCl 2
Supported On SiO 2
-MAO. MACROMOL REACT ENG 2013. [DOI: 10.1002/mren.201300130] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Emilio Casas
- Department of Chemical and Environmental Technology; ESCET; Rey Juan Carlos University; 28933, Móstoles Madrid Spain
| | - Beatriz Paredes
- Department of Chemical and Environmental Technology; ESCET; Rey Juan Carlos University; 28933, Móstoles Madrid Spain
| | - Jose María Escola
- Department of Chemical and Environmental Technology; ESCET; Rey Juan Carlos University; 28933, Móstoles Madrid Spain
| | | | - Rafael van Grieken
- Department of Chemical and Environmental Technology; ESCET; Rey Juan Carlos University; 28933, Móstoles Madrid Spain
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35
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Effect of molecular weight distribution on rheological, crystallization and mechanical properties of polyethylene-100 pipe resins. JOURNAL OF POLYMER RESEARCH 2013. [DOI: 10.1007/s10965-013-0271-9] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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36
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Monitoring abiotic degradation of branched polyethylenes formulated with pro-oxidants through different mechanical tests. Polym Degrad Stab 2013. [DOI: 10.1016/j.polymdegradstab.2013.06.004] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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37
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Shen HW, Xie BH, Yang W, Yang MB. Thermal and rheological properties of polyethylene blends with bimodal molecular weight distribution. J Appl Polym Sci 2013. [DOI: 10.1002/app.38850] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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38
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Shen G, Shen H, Xie B, Yang W, Yang M. Crystallization and fracture behaviors of high-density polyethylene/linear low-density polyethylene blends: The influence of short-chain branching. J Appl Polym Sci 2013. [DOI: 10.1002/app.38937] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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39
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Dou R, Wang W, Zhou Y, Li LP, Gong L, Yin B, Yang MB. Effect of core-shell morphology evolution on the rheology, crystallization, and mechanical properties of PA6/EPDM-g-MA/HDPE ternary blend. J Appl Polym Sci 2012. [DOI: 10.1002/app.38733] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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40
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Qin J, Zhang L, Jiang H, Zhu J, Zhang Z, Zhang W, Zhou N, Cheng Z, Zhu X. Controlled Bimodal Molecular-Weight-Distribution Polymers: Facile Synthesis by RAFT Polymerization. Chemistry 2012; 18:6015-21. [DOI: 10.1002/chem.201103914] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2011] [Indexed: 11/07/2022]
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