Ali Larous, Melia Guessoum, Sorya Nekkaa, Magali Fois
{"title":"基于El Retma天然纤维和PLA/PC混合物的新型生物复合材料,采用乙酰丙酮钐催化交换反应","authors":"Ali Larous, Melia Guessoum, Sorya Nekkaa, Magali Fois","doi":"10.1134/S1560090422200052","DOIUrl":null,"url":null,"abstract":"<div><div><h3>\n <b>Abstract</b>—</h3><p>In this work, the properties of biocomposites based on poly(lactic acid)/polycarbonate (PLA/PC) mixture and a flour obtained from a local plant which is El Retma (RET) are investigated. Due to the incompatibility of PLA/PC matrix, a transesterification catalyst which is samarium acetylacetonate (Sm) is added to promote interchange reactions and synthesize PLA-PC copolymer at the interface between the polymers. Furthermore, to improve adhesion of the natural fiber to the matrix, RET flour has been pretreated using an alkaline solution before treatment with maleic anhydride (MA). Also, to point out the effect of the rate of MA grafting and RET flour size, the properties of biocomposites based on MA-RET flours with flour sizes below 100 and 50 µm are compared. The composites with mixing time varying from 10 and 20 min have also been studied because they are expected to present different performances due to the different extents of catalyzed transesterification reactions. Fourier transform infrared spectroscopy (FTIR) and thermogravimetric analysis attested for the grafting of maleic anhydride grafting after the observation of carbonyl group band in FTIR spectra of MA-RET flour and the improvement of its thermal stability compared to the pretreated flour. The composite PLA/PC/Sm/MA-RET melt mixed during 20 min revealed better impact resistance, thermal stability and storage modulus due to the eventual higher concentration of PLA-PC copolymer and grafting of PLA and PC chains on the flour.</p></div></div>","PeriodicalId":739,"journal":{"name":"Polymer Science, Series B","volume":"64 3","pages":"313 - 325"},"PeriodicalIF":1.0000,"publicationDate":"2022-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Novel Biocomposites Based on El Retma Natural Fiber and PLA/PC Mixture Compatibilized Using Samarium Acetylacetonate Catalyzed Interchange Reactions\",\"authors\":\"Ali Larous, Melia Guessoum, Sorya Nekkaa, Magali Fois\",\"doi\":\"10.1134/S1560090422200052\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div><h3>\\n <b>Abstract</b>—</h3><p>In this work, the properties of biocomposites based on poly(lactic acid)/polycarbonate (PLA/PC) mixture and a flour obtained from a local plant which is El Retma (RET) are investigated. Due to the incompatibility of PLA/PC matrix, a transesterification catalyst which is samarium acetylacetonate (Sm) is added to promote interchange reactions and synthesize PLA-PC copolymer at the interface between the polymers. Furthermore, to improve adhesion of the natural fiber to the matrix, RET flour has been pretreated using an alkaline solution before treatment with maleic anhydride (MA). Also, to point out the effect of the rate of MA grafting and RET flour size, the properties of biocomposites based on MA-RET flours with flour sizes below 100 and 50 µm are compared. The composites with mixing time varying from 10 and 20 min have also been studied because they are expected to present different performances due to the different extents of catalyzed transesterification reactions. Fourier transform infrared spectroscopy (FTIR) and thermogravimetric analysis attested for the grafting of maleic anhydride grafting after the observation of carbonyl group band in FTIR spectra of MA-RET flour and the improvement of its thermal stability compared to the pretreated flour. The composite PLA/PC/Sm/MA-RET melt mixed during 20 min revealed better impact resistance, thermal stability and storage modulus due to the eventual higher concentration of PLA-PC copolymer and grafting of PLA and PC chains on the flour.</p></div></div>\",\"PeriodicalId\":739,\"journal\":{\"name\":\"Polymer Science, Series B\",\"volume\":\"64 3\",\"pages\":\"313 - 325\"},\"PeriodicalIF\":1.0000,\"publicationDate\":\"2022-04-29\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Polymer Science, Series B\",\"FirstCategoryId\":\"1\",\"ListUrlMain\":\"https://link.springer.com/article/10.1134/S1560090422200052\",\"RegionNum\":4,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"POLYMER SCIENCE\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Polymer Science, Series B","FirstCategoryId":"1","ListUrlMain":"https://link.springer.com/article/10.1134/S1560090422200052","RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"POLYMER SCIENCE","Score":null,"Total":0}
Novel Biocomposites Based on El Retma Natural Fiber and PLA/PC Mixture Compatibilized Using Samarium Acetylacetonate Catalyzed Interchange Reactions
Abstract—
In this work, the properties of biocomposites based on poly(lactic acid)/polycarbonate (PLA/PC) mixture and a flour obtained from a local plant which is El Retma (RET) are investigated. Due to the incompatibility of PLA/PC matrix, a transesterification catalyst which is samarium acetylacetonate (Sm) is added to promote interchange reactions and synthesize PLA-PC copolymer at the interface between the polymers. Furthermore, to improve adhesion of the natural fiber to the matrix, RET flour has been pretreated using an alkaline solution before treatment with maleic anhydride (MA). Also, to point out the effect of the rate of MA grafting and RET flour size, the properties of biocomposites based on MA-RET flours with flour sizes below 100 and 50 µm are compared. The composites with mixing time varying from 10 and 20 min have also been studied because they are expected to present different performances due to the different extents of catalyzed transesterification reactions. Fourier transform infrared spectroscopy (FTIR) and thermogravimetric analysis attested for the grafting of maleic anhydride grafting after the observation of carbonyl group band in FTIR spectra of MA-RET flour and the improvement of its thermal stability compared to the pretreated flour. The composite PLA/PC/Sm/MA-RET melt mixed during 20 min revealed better impact resistance, thermal stability and storage modulus due to the eventual higher concentration of PLA-PC copolymer and grafting of PLA and PC chains on the flour.
期刊介绍:
Polymer Science, Series B is a journal published in collaboration with the Russian Academy of Sciences. Series B experimental and theoretical papers and reviews dealing with the synthesis, kinetics, catalysis, and chemical transformations of macromolecules, supramolecular structures, and polymer matrix-based composites (6 issues a year). All journal series present original papers and reviews covering all fundamental aspects of macromolecular science. Contributions should be of marked novelty and interest for a broad readership. Articles may be written in English or Russian regardless of country and nationality of authors. All manuscripts are peer reviewed