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Yu S, Zhang Y, Wang XZ. Improved Understanding of Cefixime Trihydrate Reactive Crystallization and Process Scale-up with the Aid of PAT. Org Process Res Dev 2019. [DOI: 10.1021/acs.oprd.8b00190] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Shuai Yu
- Engineering Centre for Pharmaceuticals and Advanced Control, Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, Guangdong Province, People’s Republic of China, 510640
- Shandong Analysis and Test Center, Qilu University of Technology (Shandong Academy of Sciences), 19 Keyuan Road, Jinan, Shandong, People’s Republic of China, 250014
| | - Yang Zhang
- Engineering Centre for Pharmaceuticals and Advanced Control, Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, Guangdong Province, People’s Republic of China, 510640
| | - Xue Z. Wang
- Engineering Centre for Pharmaceuticals and Advanced Control, Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, Guangdong Province, People’s Republic of China, 510640
- Shandong Analysis and Test Center, Qilu University of Technology (Shandong Academy of Sciences), 19 Keyuan Road, Jinan, Shandong, People’s Republic of China, 250014
- School of Chemical and Process Engineering, University of Leeds, Leeds LS2 9JT, U.K
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Lin JR, Lin JH, Chen QH. Anti-Aging Performance of Cardanol Grafted onto Polypropylene by Reactive Extrusion. INT POLYM PROC 2015. [DOI: 10.3139/217.2944] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Abstract
The cardanol grafted onto polypropylene (CAPP) was prepared by reactive extrusion with polypropylene (PP) and natural renewable cardanol, which could improve the inherent defects of PP such as chemical inertness and hydrophobicity. Moreover, the cardanol grafted onto PP could resolve the degradation of PP during the process of reactive extrusion, storage and application. In this paper, the yield strength, tensile strength, elongation at break of modified and unmodified PPs were tested during the aging process. A possible aging mechanim of PP and anti-aging mechanism of cardanol grafted onto PP were proposed. Results showed that the initiator dicumyl peroxide caused the degradation of PP chains during the aging processing. After being aged for 24 h, the yield strength CAPP0 decreased from 28 MPa to 15 MPa and the elongation at break reduced by 795%. CAPPs possessed outstanding anti-aging performance owing to the cross-linking and entanglement of the side chains of cardanol grafted onto PP. The yield strength, tensile strength and the elongation at break of CAPP5 changed lightly even when it was in long-term irradiation for 480 h. The CAPPs had better anti-aging properties than the mixture of PP and 5% of cardanol. CAPP containing 3% of cardanol could effectively prevent the degradation of the main chain polypropylene.
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Affiliation(s)
- J.-R. Lin
- College of Chemistry and Chemical Engineering , Fujian Normal University, Fuzhou , PRC
| | - J.-H. Lin
- College of Material Science and Engineering , Fujian Normal University, Fuzhou , PRC
- Fujian Key Laboratory of Polymer Materials , Fuzhou , PRC
| | - Q.-H. Chen
- College of Material Science and Engineering , Fujian Normal University, Fuzhou , PRC
- Fujian Key Laboratory of Polymer Materials , Fuzhou , PRC
- College of Chemistry and Chemical Engineering , Fujian Normal University, Fuzhou , PRC
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Wang SW, Leng YT, Jiang J, Zheng GQ, Li Q. Competition between α and β Crystallization in Isotactic Polypropylene: Effect of Nucleating Agents Composition. INT POLYM PROC 2015. [DOI: 10.3139/217.3023] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Abstract
Based on the different nucleation ability, different contents and proportions of the mixed nucleating agents were melt compounded with pure isotactic polypropylene resins employed in this work, selective β nucleating agent was a compound of pimelic acid and calcium stearate, the α nucleating agent was a type of dibenzylidene sorbitol derivative. The competition attributed to the different type of interactions between a nucleating agent and isotactic polypropylene molecular chains during crystallization was investigated in this research. For a low content of the mixed nucleating agents used, α nucleation dominated the crystallization behavior of isotactic polypropylene, while with an increase of the content of the mixed nucleating agents, the situation was reversed and β nucleation became dominant. In the β dominated region, both of the molecular chain and segmental motions were various with different nucleating agent proportion. Thus, the content and proportion of the components of the nucleating agents were the critical factors in the competition during crystallization.
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Affiliation(s)
- S.-W. Wang
- National Center for International Joint Research of Micro-Nano Molding Technology , Zhengzhou University, Zhengzhou, Henan , PRC
| | - Y.-T. Leng
- College of Chemistry and Molecular Engineering , Key Laboratory of Chemical Biology and Organic Chemistry of Henan Province, Zhengzhou University, Zhengzhou, Henan , PRC
| | - J. Jiang
- National Center for International Joint Research of Micro-Nano Molding Technology , Zhengzhou University, Zhengzhou, Henan , PRC
| | - G.-Q. Zheng
- National Engineering Research Center for Advanced Polymer Processing Technology , Zhengzhou University, Zhengzhou, Henan , PRC
| | - Q. Li
- National Center for International Joint Research of Micro-Nano Molding Technology , Zhengzhou University, Zhengzhou, Henan , PRC
- National Engineering Research Center for Advanced Polymer Processing Technology , Zhengzhou University, Zhengzhou, Henan , PRC
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Yin F, Chen Q, Lin J, Deng Y, Mao X. Effect of different peroxide initiators on the reaction extrusion of polypropylene-graft-cardanol and its compatibilization on PP/PC. JOURNAL OF POLYMER RESEARCH 2014. [DOI: 10.1007/s10965-014-0411-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Preparation and reaction kinetics of polypropylene-graft-cardanol by reactive extrusion and its compatibilization on polypropylene/polystyrene. J Appl Polym Sci 2013. [DOI: 10.1002/app.39911] [Citation(s) in RCA: 7] [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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