{"title":"原位接枝三元乙丙橡胶(EPDM)多嵌段共聚物作为聚乙烯(PE)和同方聚丙烯(iPP)混合物的相容剂","authors":"Feng Yu, Chuanjiang Long, Sitong Feng, Zhen Dong, Xiaoqing Liu, Yuanzhi Li, Zhong-Ren Chen","doi":"10.1016/j.polymer.2024.127959","DOIUrl":null,"url":null,"abstract":"Addressing the mounting issue of plastic waste, particularly the recycling of polyethylene (PE) and isotactic polypropylene (iPP), requires inventive and economically viable solutions. Employing compatibilizers for physical recycling is one of the most promising ways. This study utilizes reversible free radical reaction to facilitate the grafting reaction of ethylene propylene diene monomer (EPDM) between PE (or iPP) at the interface. Only 1wt.%-3wt.% EPDM is required for reactive blending, resulting in the formation of a graft multi-block copolymer that significantly improves the compatibility between PE and PP. This improvement notably enhances the mechanical properties, especially the elongation at break, which can reach up to 700%. Even after three processing cycles, the elongation at break of samples can still reach approximately 400%. The mechanism for reactive compatibilization has been supported by various characterization techniques, including tensile, rheology, peeling, and transmission electron microscope (TEM) tests. The mechanical properties of the samples were diminished when EPDM was replaced by the synthesized copolymer of ethylene and ethylidene norbornene (CEENB) and vinyl-terminated polyethylene (VPE). This observation confirms that EPDM located at the PE/iPP interface significantly contributes to the formation of grafted multi-block copolymers. Notably, the grafting reaction causes a negligible shift in the molecular weight peak, indicating minimal degradation and cross-linking of the polymers. The reversible free radical reaction involving sulfur and tetramethyl thiuramyl monosulfide (TMTM) reagents plays an important role in reducing side reactions.","PeriodicalId":405,"journal":{"name":"Polymer","volume":"30 1","pages":""},"PeriodicalIF":4.1000,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"In-Situ Grafted Ethylene Propylene Diene Monomer (EPDM) Rubber Multiblock Copolymers as Compatibilizers for Polyethylene (PE) and Isotactic Polypropylene (iPP) Blends\",\"authors\":\"Feng Yu, Chuanjiang Long, Sitong Feng, Zhen Dong, Xiaoqing Liu, Yuanzhi Li, Zhong-Ren Chen\",\"doi\":\"10.1016/j.polymer.2024.127959\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Addressing the mounting issue of plastic waste, particularly the recycling of polyethylene (PE) and isotactic polypropylene (iPP), requires inventive and economically viable solutions. Employing compatibilizers for physical recycling is one of the most promising ways. This study utilizes reversible free radical reaction to facilitate the grafting reaction of ethylene propylene diene monomer (EPDM) between PE (or iPP) at the interface. Only 1wt.%-3wt.% EPDM is required for reactive blending, resulting in the formation of a graft multi-block copolymer that significantly improves the compatibility between PE and PP. This improvement notably enhances the mechanical properties, especially the elongation at break, which can reach up to 700%. Even after three processing cycles, the elongation at break of samples can still reach approximately 400%. The mechanism for reactive compatibilization has been supported by various characterization techniques, including tensile, rheology, peeling, and transmission electron microscope (TEM) tests. The mechanical properties of the samples were diminished when EPDM was replaced by the synthesized copolymer of ethylene and ethylidene norbornene (CEENB) and vinyl-terminated polyethylene (VPE). This observation confirms that EPDM located at the PE/iPP interface significantly contributes to the formation of grafted multi-block copolymers. Notably, the grafting reaction causes a negligible shift in the molecular weight peak, indicating minimal degradation and cross-linking of the polymers. The reversible free radical reaction involving sulfur and tetramethyl thiuramyl monosulfide (TMTM) reagents plays an important role in reducing side reactions.\",\"PeriodicalId\":405,\"journal\":{\"name\":\"Polymer\",\"volume\":\"30 1\",\"pages\":\"\"},\"PeriodicalIF\":4.1000,\"publicationDate\":\"2024-12-16\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Polymer\",\"FirstCategoryId\":\"92\",\"ListUrlMain\":\"https://doi.org/10.1016/j.polymer.2024.127959\",\"RegionNum\":2,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"POLYMER SCIENCE\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Polymer","FirstCategoryId":"92","ListUrlMain":"https://doi.org/10.1016/j.polymer.2024.127959","RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"POLYMER SCIENCE","Score":null,"Total":0}
In-Situ Grafted Ethylene Propylene Diene Monomer (EPDM) Rubber Multiblock Copolymers as Compatibilizers for Polyethylene (PE) and Isotactic Polypropylene (iPP) Blends
Addressing the mounting issue of plastic waste, particularly the recycling of polyethylene (PE) and isotactic polypropylene (iPP), requires inventive and economically viable solutions. Employing compatibilizers for physical recycling is one of the most promising ways. This study utilizes reversible free radical reaction to facilitate the grafting reaction of ethylene propylene diene monomer (EPDM) between PE (or iPP) at the interface. Only 1wt.%-3wt.% EPDM is required for reactive blending, resulting in the formation of a graft multi-block copolymer that significantly improves the compatibility between PE and PP. This improvement notably enhances the mechanical properties, especially the elongation at break, which can reach up to 700%. Even after three processing cycles, the elongation at break of samples can still reach approximately 400%. The mechanism for reactive compatibilization has been supported by various characterization techniques, including tensile, rheology, peeling, and transmission electron microscope (TEM) tests. The mechanical properties of the samples were diminished when EPDM was replaced by the synthesized copolymer of ethylene and ethylidene norbornene (CEENB) and vinyl-terminated polyethylene (VPE). This observation confirms that EPDM located at the PE/iPP interface significantly contributes to the formation of grafted multi-block copolymers. Notably, the grafting reaction causes a negligible shift in the molecular weight peak, indicating minimal degradation and cross-linking of the polymers. The reversible free radical reaction involving sulfur and tetramethyl thiuramyl monosulfide (TMTM) reagents plays an important role in reducing side reactions.
期刊介绍:
Polymer is an interdisciplinary journal dedicated to publishing innovative and significant advances in Polymer Physics, Chemistry and Technology. We welcome submissions on polymer hybrids, nanocomposites, characterisation and self-assembly. Polymer also publishes work on the technological application of polymers in energy and optoelectronics.
The main scope is covered but not limited to the following core areas:
Polymer Materials
Nanocomposites and hybrid nanomaterials
Polymer blends, films, fibres, networks and porous materials
Physical Characterization
Characterisation, modelling and simulation* of molecular and materials properties in bulk, solution, and thin films
Polymer Engineering
Advanced multiscale processing methods
Polymer Synthesis, Modification and Self-assembly
Including designer polymer architectures, mechanisms and kinetics, and supramolecular polymerization
Technological Applications
Polymers for energy generation and storage
Polymer membranes for separation technology
Polymers for opto- and microelectronics.