Mechanical Properties and Non-Isothermal Crystallization Kinetics of Polylactic Acid Modified by Polyacrylic Elastomers and Cellulose Nanocrystals
In this paper, a polyacrylic elastomer latex with butyl acrylate (BA) as the core and methyl methacrylate (MMA) copolymerized with glycidyl methacrylate (GMA) as the shell, named poly(BA-MMA-GMA) (PBMG), was synthesized by seeded emulsion polymerization. Cellulose nanocrystal (CNC) was dispersed in...
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MDPI AG
2023-09-01
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| Series: | Polymers |
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| Online Access: | https://www.mdpi.com/2073-4360/15/18/3767 |
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| author | Weixiao Meng Xiaojie Zhang Xiuli Hu Yingchun Liu Jimin Zhang Xiongwei Qu Beckry Abdel-Magid |
| author_facet | Weixiao Meng Xiaojie Zhang Xiuli Hu Yingchun Liu Jimin Zhang Xiongwei Qu Beckry Abdel-Magid |
| author_sort | Weixiao Meng |
| collection | DOAJ |
| description | In this paper, a polyacrylic elastomer latex with butyl acrylate (BA) as the core and methyl methacrylate (MMA) copolymerized with glycidyl methacrylate (GMA) as the shell, named poly(BA-MMA-GMA) (PBMG), was synthesized by seeded emulsion polymerization. Cellulose nanocrystal (CNC) was dispersed in the polyacrylic latex to prepare PBMG/CNC dispersions with different CNC contents. The dried product was mixed with polylactic acid (PLA) to fabricate PLA/PBMG/CNC blends. The addition of PBMG and PBMG/CNC improved the mechanical properties of the PLA matrix. Differential scanning calorimetry (DSC) was used to investigate the non-isothermal crystallization kinetics. The Avrami equation modified by the Jeziorny, Ozawa and Mo equations was used to analyze the non-isothermal crystallization kinetics of PLA and its blends. Analysis of the crystallization halftime of non-isothermal conditions indicated that the overall rate of crystallization increased significantly at 1 wt% content of CNC. This seemed to result from the increase of nucleation density and the acceleration of segment movement in the presence of the CNC component. This phenomenon was verified by polarizing microscope observation. |
| first_indexed | 2024-03-10T22:10:55Z |
| format | Article |
| id | doaj.art-07b22da02ef74b4b812ae7386273a514 |
| institution | Directory Open Access Journal |
| issn | 2073-4360 |
| language | English |
| last_indexed | 2024-03-10T22:10:55Z |
| publishDate | 2023-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Polymers |
| spelling | doaj.art-07b22da02ef74b4b812ae7386273a5142023-11-19T12:35:31ZengMDPI AGPolymers2073-43602023-09-011518376710.3390/polym15183767Mechanical Properties and Non-Isothermal Crystallization Kinetics of Polylactic Acid Modified by Polyacrylic Elastomers and Cellulose NanocrystalsWeixiao Meng0Xiaojie Zhang1Xiuli Hu2Yingchun Liu3Jimin Zhang4Xiongwei Qu5Beckry Abdel-Magid6Hebei Key Laboratory of Functional Polymers, School of Chemical Engineering, Hebei University of Technology, Tianjin 300130, ChinaHebei Key Laboratory of Functional Polymers, School of Chemical Engineering, Hebei University of Technology, Tianjin 300130, ChinaHebei Key Laboratory of Functional Polymers, School of Chemical Engineering, Hebei University of Technology, Tianjin 300130, ChinaJinghua Plastics Industry Co. Ltd., Langfang 065800, ChinaHebei Key Laboratory of Functional Polymers, School of Chemical Engineering, Hebei University of Technology, Tianjin 300130, ChinaHebei Key Laboratory of Functional Polymers, School of Chemical Engineering, Hebei University of Technology, Tianjin 300130, ChinaDepartment of Composite Materials Engineering, Winona State University, Winona, MN 55987, USAIn this paper, a polyacrylic elastomer latex with butyl acrylate (BA) as the core and methyl methacrylate (MMA) copolymerized with glycidyl methacrylate (GMA) as the shell, named poly(BA-MMA-GMA) (PBMG), was synthesized by seeded emulsion polymerization. Cellulose nanocrystal (CNC) was dispersed in the polyacrylic latex to prepare PBMG/CNC dispersions with different CNC contents. The dried product was mixed with polylactic acid (PLA) to fabricate PLA/PBMG/CNC blends. The addition of PBMG and PBMG/CNC improved the mechanical properties of the PLA matrix. Differential scanning calorimetry (DSC) was used to investigate the non-isothermal crystallization kinetics. The Avrami equation modified by the Jeziorny, Ozawa and Mo equations was used to analyze the non-isothermal crystallization kinetics of PLA and its blends. Analysis of the crystallization halftime of non-isothermal conditions indicated that the overall rate of crystallization increased significantly at 1 wt% content of CNC. This seemed to result from the increase of nucleation density and the acceleration of segment movement in the presence of the CNC component. This phenomenon was verified by polarizing microscope observation.https://www.mdpi.com/2073-4360/15/18/3767polylactic acidpolyacrylic elastomercellulose nanocrystalnon-isothermal crystallization kineticsfabrication technique |
| spellingShingle | Weixiao Meng Xiaojie Zhang Xiuli Hu Yingchun Liu Jimin Zhang Xiongwei Qu Beckry Abdel-Magid Mechanical Properties and Non-Isothermal Crystallization Kinetics of Polylactic Acid Modified by Polyacrylic Elastomers and Cellulose Nanocrystals Polymers polylactic acid polyacrylic elastomer cellulose nanocrystal non-isothermal crystallization kinetics fabrication technique |
| title | Mechanical Properties and Non-Isothermal Crystallization Kinetics of Polylactic Acid Modified by Polyacrylic Elastomers and Cellulose Nanocrystals |
| title_full | Mechanical Properties and Non-Isothermal Crystallization Kinetics of Polylactic Acid Modified by Polyacrylic Elastomers and Cellulose Nanocrystals |
| title_fullStr | Mechanical Properties and Non-Isothermal Crystallization Kinetics of Polylactic Acid Modified by Polyacrylic Elastomers and Cellulose Nanocrystals |
| title_full_unstemmed | Mechanical Properties and Non-Isothermal Crystallization Kinetics of Polylactic Acid Modified by Polyacrylic Elastomers and Cellulose Nanocrystals |
| title_short | Mechanical Properties and Non-Isothermal Crystallization Kinetics of Polylactic Acid Modified by Polyacrylic Elastomers and Cellulose Nanocrystals |
| title_sort | mechanical properties and non isothermal crystallization kinetics of polylactic acid modified by polyacrylic elastomers and cellulose nanocrystals |
| topic | polylactic acid polyacrylic elastomer cellulose nanocrystal non-isothermal crystallization kinetics fabrication technique |
| url | https://www.mdpi.com/2073-4360/15/18/3767 |
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