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Zhao Z, Zhou S, Quan L, Xia W, Fan Q, Zhang P, Chen Y, Tang D. Polypropylene Composites with Ultrahigh Low-Temperature Toughness by Tuning the Phase Morphology. Ind Eng Chem Res 2022. [DOI: 10.1021/acs.iecr.2c02818] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Zhongguo Zhao
- National and Local Engineering Laboratory for Slag Comprehensive Utilization and Environment Technology, School of Materials Science and Engineering, Shaanxi University of Technology, Hanzhong723000, China
| | - Shengtai Zhou
- The State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute, Sichuan University, Chengdu610065, China
| | - Lijun Quan
- School of Chemistry and Chemical Engineering, Shaanxi Key Laboratory of Macromolecular Science and Technology, Key Laboratory of Special Functional and Smart Polymer Materials of Ministry of Industry and Information Technology, Northwestern Polytechnical University, Xi’an710072, China
| | - Weilong Xia
- School of Chemistry and Chemical Engineering, Shaanxi Key Laboratory of Macromolecular Science and Technology, Key Laboratory of Special Functional and Smart Polymer Materials of Ministry of Industry and Information Technology, Northwestern Polytechnical University, Xi’an710072, China
| | - Qian Fan
- School of Chemistry and Chemical Engineering, Shaanxi Key Laboratory of Macromolecular Science and Technology, Key Laboratory of Special Functional and Smart Polymer Materials of Ministry of Industry and Information Technology, Northwestern Polytechnical University, Xi’an710072, China
| | - Penghui Zhang
- School of Chemistry and Chemical Engineering, Shaanxi Key Laboratory of Macromolecular Science and Technology, Key Laboratory of Special Functional and Smart Polymer Materials of Ministry of Industry and Information Technology, Northwestern Polytechnical University, Xi’an710072, China
| | - Yanhui Chen
- School of Chemistry and Chemical Engineering, Shaanxi Key Laboratory of Macromolecular Science and Technology, Key Laboratory of Special Functional and Smart Polymer Materials of Ministry of Industry and Information Technology, Northwestern Polytechnical University, Xi’an710072, China
| | - Dahang Tang
- Central Research Institute, Kingfa Science and Technology Co., Ltd., Huangpu, Guangdong510663, China
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Zhou WC, Du ZC, Yang H, Li JJ, Zhang Y, Gao XQ, Fu Q. Effect of Different Shear Modes on Morphology and Mechanical Properties of Polypropylene Pipes Produced by Rotational Shear. CHINESE JOURNAL OF POLYMER SCIENCE 2020. [DOI: 10.1007/s10118-020-2477-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Chlorinated Water Induced Aging of Pipe Grade Polypropylene Random Copolymers. Polymers (Basel) 2019; 11:polym11060996. [PMID: 31167458 PMCID: PMC6631949 DOI: 10.3390/polym11060996] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2019] [Revised: 05/29/2019] [Accepted: 05/30/2019] [Indexed: 11/19/2022] Open
Abstract
Polypropylene random copolymers (PP-R) are common materials for pressurized hot water pipes. In many pipe systems, potable water is disinfected by chlorine to prevent waterborne diseases. This paper deals with hot chlorinated water induced aging of two PP-R grades with varying morphology. One material had a conventional monoclinic α crystal form (PP-Rα), whereas the other was explicitly beta-nucleated resulting in a trigonal β crystal form with a fine spherulite structure (PP-Rβ). Micro-sized specimens with a thickness of 100 µm were used for aging experiments at 60 °C in chlorinated water with 5 mg/L free chlorine, and aging indicators were monitored for exposure times of up to 2000 h. On the other hand, superimposed mechanical-environmental tests were carried out by using cracked round bar specimens with a diameter of 14 mm to determine the fatigue crack growth (FCG) resistance of both PP-R grades at 60 °C in non-chlorinated and chlorinated water. PP-Rβ was found to outperform PP-Rα with an about 30% higher time-to-embrittlement value of 2000 h. Furthermore, PP-Rβ exhibited an enhanced FCG resistance in both non-chlorinated and chlorinated water. The effect of chlorine content on the deterioration of the FCG resistances was significantly more pronounced for PP-Rα.
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Chen Y, Fan Q, Yang S, Zhang Q, Li Z. Greatly improved toughness of isotactic polypropylene blends with traces of carbon nanotubes. POLYM ENG SCI 2018. [DOI: 10.1002/pen.25000] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Yanhui Chen
- Department of Applied Chemistry, School of ScienceNorthwestern Polytechnical University Xi'an 710072 China
| | - Qian Fan
- Department of Applied Chemistry, School of ScienceNorthwestern Polytechnical University Xi'an 710072 China
| | - Song Yang
- Department of Applied Chemistry, School of ScienceNorthwestern Polytechnical University Xi'an 710072 China
| | - Qiuyu Zhang
- Department of Applied Chemistry, School of ScienceNorthwestern Polytechnical University Xi'an 710072 China
| | - Zhongming Li
- College of Polymer Science and Engineering and State Key Laboratory of Polymer Materials EngineeringSichuan University Chengdu 610065 China
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6
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A novel insight into the origin of toughness in polypropylene–calcium carbonate microcomposites: Multivariate analysis of ss-NMR spectra. POLYMER 2017. [DOI: 10.1016/j.polymer.2017.10.071] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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7
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Han R, Nie M, Wang Q, Yan S. Self-Assembly β Nucleating Agent Induced Polymorphic Transition from α-Form Shish Kebab to β-Form Highly Ordered Lamella under Intense Shear Field. Ind Eng Chem Res 2017. [DOI: 10.1021/acs.iecr.6b04908] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Rui Han
- School
of Materials Science and Engineering, Xihua University, Chengdu 610039, China
- State
Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu 610065, China
| | - Min Nie
- State
Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu 610065, China
| | - Qi Wang
- State
Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu 610065, China
| | - Shi Yan
- Sichuan Provincial Key Lab of Process Equipment and Control, Sichuan University of Science & Engineering, Zigong 643000, China
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Gahleitner M, Mileva D, Androsch R, Gloger D, Tranchida D, Sandholzer M, Doshev P. Crystallinity-Based Product Design: Utilizing the Polymorphism of Isotactic PP Homo- and Copolymers. INT POLYM PROC 2016. [DOI: 10.3139/217.3242] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Abstract
The polymorphism of isotactic polypropylene (iPP) in combination with the strong response of this polymer to nucleation can be utilized for expanding the application range of this versatile polymer. Based on three “case studies” related to β-iPP pressure pipes, ethylene-propylene (EP) random copolymers for thin-wall injection molding and transparency and sterilization resistance of cast films we demonstrate ways of combining polymer composition, nucleation and process settings to achieve the desired application performance. The importance of considering interactions between polymer design, nucleation and processing parameters for designing application properties is highlighted.
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Affiliation(s)
- M. Gahleitner
- Borealis Polyolefine GmbH , Innovation Headquarters, Linz , Austria
| | - D. Mileva
- Borealis Polyolefine GmbH , Innovation Headquarters, Linz , Austria
| | - R. Androsch
- Institute for Polymeric Materials , Martin-Luther-University Halle-Wittenberg, Merseburg , Germany
| | - D. Gloger
- Borealis Polyolefine GmbH , Innovation Headquarters, Linz , Austria
| | - D. Tranchida
- Borealis Polyolefine GmbH , Innovation Headquarters, Linz , Austria
| | - M. Sandholzer
- Borealis Polyolefine GmbH , Innovation Headquarters, Linz , Austria
| | - P. Doshev
- Borealis Polyolefine GmbH , Innovation Headquarters, Linz , Austria
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Mani MR, Chellaswamy R, Marathe YN, Pillai VK. New Understanding on Regulating the Crystallization and Morphology of the β-Polymorph of Isotactic Polypropylene Based on Carboxylate–Alumoxane Nucleating Agents. Macromolecules 2016. [DOI: 10.1021/acs.macromol.5b02466] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- Mohan Raj Mani
- Polymer
Science and Engineering Division, Polymers and Advanced Materials
Laboratory, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune-411 008, India
- Academy of Scientific and Innovative Research (AcSIR) New Delhi 110 025, India
| | - Ramesh Chellaswamy
- Polymer
Science and Engineering Division, Polymers and Advanced Materials
Laboratory, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune-411 008, India
- Academy of Scientific and Innovative Research (AcSIR) New Delhi 110 025, India
| | - Yogesh N. Marathe
- Polymer
Science and Engineering Division, Polymers and Advanced Materials
Laboratory, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pune-411 008, India
- Academy of Scientific and Innovative Research (AcSIR) New Delhi 110 025, India
| | - Vijayamohanan K. Pillai
- Academy of Scientific and Innovative Research (AcSIR) New Delhi 110 025, India
- CSIR-Central Electrochemical Research Institute, Karaikudi-630006, India
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Liu Y, Ren WM, Zhang WP, Zhao RR, Lu XB. Crystalline CO2-based polycarbonates prepared from racemic catalyst through intramolecularly interlocked assembly. Nat Commun 2015; 6:8594. [PMID: 26469884 PMCID: PMC4634215 DOI: 10.1038/ncomms9594] [Citation(s) in RCA: 59] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2015] [Accepted: 09/04/2015] [Indexed: 11/09/2022] Open
Abstract
The crystalline stereocomplexed polycarbonates can be prepared by mixing enantiopure polymers with opposite configuration, which derived from the asymmetric copolymerization with CO2 using enantiopure catalyst or/and chiral epoxides. Herein, we develop a powerful strategy for producing crystalline intramolecular stereocomplexed polycarbonates from racemic catalysts, which possess similar thermal stability and crystalline behaviour in comparison with the stereocomplexes by mixing opposite enantiopure polymers. Living polymer chains shuttle between catalyst molecules with different configurations to produce diastereomeric active species which is suggested to be responsible for the formation of isotactic multiblock polycarbonates in racemic bimetallic cobalt catalyst-mediated stereoselective copolymerization of CO2 and meso-epoxides. Solid-state NMR spectroscopy study suggests that the interaction in the carbonyl and methine regions is responsible for the strong crystallization capacity and compact package structure in the crystalline polycarbonates. Crystalline polycarbonates can be formed by mixing enantiopure polymers with opposite configurations. Here, the authors produce crystalline intramolecular stereocomplexed polycarbonates using a racemic catalyst, and show that these display similar properties to those formed by mixing the two enantiomers.
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Affiliation(s)
- Ye Liu
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116024, China
| | - Wei-Min Ren
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116024, China
| | - Wei-Ping Zhang
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116024, China
| | - Rong-Rong Zhao
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116024, China
| | - Xiao-Bing Lu
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116024, China
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