Cargando…
Effect of Different Comonomers Added to Graft Copolymers on the Properties of PLA/PPC/PLA-g-GMA Blends
The melt-free radical grafting of glycidyl methacrylate (GMA) onto poly (lactic acid) (PLA) with styrene (St), α-methylstyrene (AMS), and epoxy resin (EP) as comonomers in a twin-screw extruder was used to prepare PLA-g-GMA graft copolymers. The prepared graft copolymers were then used as compatibil...
Autores principales: | , , , , , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2022
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9573763/ https://www.ncbi.nlm.nih.gov/pubmed/36236042 http://dx.doi.org/10.3390/polym14194088 |
_version_ | 1784810954245013504 |
---|---|
author | Song, Lixin Zhang, Qian Hao, Yongsheng Li, Yongchao Chi, Weihan Cong, Fei Shi, Ying Liu, Li-Zhi |
author_facet | Song, Lixin Zhang, Qian Hao, Yongsheng Li, Yongchao Chi, Weihan Cong, Fei Shi, Ying Liu, Li-Zhi |
author_sort | Song, Lixin |
collection | PubMed |
description | The melt-free radical grafting of glycidyl methacrylate (GMA) onto poly (lactic acid) (PLA) with styrene (St), α-methylstyrene (AMS), and epoxy resin (EP) as comonomers in a twin-screw extruder was used to prepare PLA-g-GMA graft copolymers. The prepared graft copolymers were then used as compatibilizers to prepare PLA/PPC/PLA-g-GMA blends by melt blending with PLA and polypropylene carbonate (PPC), respectively. The effects of different comonomers in the PLA-g-GMA graft copolymers on the thermal, rheological, optical, and mechanical properties and microstructure of the blends were studied. It was found that the grafting degree of PLA-g-GMA graft copolymers was increased to varying degrees after the introduction of comonomers in the PLA-g-GMA grafting reaction system. When St was used as the comonomer, the grafting degree of the PLA-g-GMA graft copolymer increased most significantly, from 0.8 to 1.6 phr. St as a comonomer also most improved the compatibility between PLA and PPC, and the haze of the blends was reduced while maintaining high transmittance. In addition, the PLA-g-GMA graft copolymer with the introduction of St as a comonomer significantly improved the impact toughness of the blends, while the thermal stability and tensile strength of the blends remained largely unchanged. |
format | Online Article Text |
id | pubmed-9573763 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-95737632022-10-17 Effect of Different Comonomers Added to Graft Copolymers on the Properties of PLA/PPC/PLA-g-GMA Blends Song, Lixin Zhang, Qian Hao, Yongsheng Li, Yongchao Chi, Weihan Cong, Fei Shi, Ying Liu, Li-Zhi Polymers (Basel) Article The melt-free radical grafting of glycidyl methacrylate (GMA) onto poly (lactic acid) (PLA) with styrene (St), α-methylstyrene (AMS), and epoxy resin (EP) as comonomers in a twin-screw extruder was used to prepare PLA-g-GMA graft copolymers. The prepared graft copolymers were then used as compatibilizers to prepare PLA/PPC/PLA-g-GMA blends by melt blending with PLA and polypropylene carbonate (PPC), respectively. The effects of different comonomers in the PLA-g-GMA graft copolymers on the thermal, rheological, optical, and mechanical properties and microstructure of the blends were studied. It was found that the grafting degree of PLA-g-GMA graft copolymers was increased to varying degrees after the introduction of comonomers in the PLA-g-GMA grafting reaction system. When St was used as the comonomer, the grafting degree of the PLA-g-GMA graft copolymer increased most significantly, from 0.8 to 1.6 phr. St as a comonomer also most improved the compatibility between PLA and PPC, and the haze of the blends was reduced while maintaining high transmittance. In addition, the PLA-g-GMA graft copolymer with the introduction of St as a comonomer significantly improved the impact toughness of the blends, while the thermal stability and tensile strength of the blends remained largely unchanged. MDPI 2022-09-29 /pmc/articles/PMC9573763/ /pubmed/36236042 http://dx.doi.org/10.3390/polym14194088 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Song, Lixin Zhang, Qian Hao, Yongsheng Li, Yongchao Chi, Weihan Cong, Fei Shi, Ying Liu, Li-Zhi Effect of Different Comonomers Added to Graft Copolymers on the Properties of PLA/PPC/PLA-g-GMA Blends |
title | Effect of Different Comonomers Added to Graft Copolymers on the Properties of PLA/PPC/PLA-g-GMA Blends |
title_full | Effect of Different Comonomers Added to Graft Copolymers on the Properties of PLA/PPC/PLA-g-GMA Blends |
title_fullStr | Effect of Different Comonomers Added to Graft Copolymers on the Properties of PLA/PPC/PLA-g-GMA Blends |
title_full_unstemmed | Effect of Different Comonomers Added to Graft Copolymers on the Properties of PLA/PPC/PLA-g-GMA Blends |
title_short | Effect of Different Comonomers Added to Graft Copolymers on the Properties of PLA/PPC/PLA-g-GMA Blends |
title_sort | effect of different comonomers added to graft copolymers on the properties of pla/ppc/pla-g-gma blends |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9573763/ https://www.ncbi.nlm.nih.gov/pubmed/36236042 http://dx.doi.org/10.3390/polym14194088 |
work_keys_str_mv | AT songlixin effectofdifferentcomonomersaddedtograftcopolymersonthepropertiesofplappcplaggmablends AT zhangqian effectofdifferentcomonomersaddedtograftcopolymersonthepropertiesofplappcplaggmablends AT haoyongsheng effectofdifferentcomonomersaddedtograftcopolymersonthepropertiesofplappcplaggmablends AT liyongchao effectofdifferentcomonomersaddedtograftcopolymersonthepropertiesofplappcplaggmablends AT chiweihan effectofdifferentcomonomersaddedtograftcopolymersonthepropertiesofplappcplaggmablends AT congfei effectofdifferentcomonomersaddedtograftcopolymersonthepropertiesofplappcplaggmablends AT shiying effectofdifferentcomonomersaddedtograftcopolymersonthepropertiesofplappcplaggmablends AT liulizhi effectofdifferentcomonomersaddedtograftcopolymersonthepropertiesofplappcplaggmablends |