MSP 24P Polyethylene-polyamide blends: new materials from recycled polymers using novel thermoplastic block copolymers as compatibilizers
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TANASA, Fulga, BUSKO, Natalya, ZANOAGA, Madalina, BARANTSOVA, Antonina, GRIŞCENCO, V.. MSP 24P Polyethylene-polyamide blends: new materials from recycled polymers using novel thermoplastic block copolymers as compatibilizers. In: Materials Science and Condensed Matter Physics, 13-17 septembrie 2010, Chișinău. Chișinău, Republica Moldova: Institutul de Fizică Aplicată, 2010, Editia 5, p. 92.
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Materials Science and Condensed Matter Physics
Editia 5, 2010
Conferința "Materials Science and Condensed Matter Physics"
Chișinău, Moldova, 13-17 septembrie 2010

MSP 24P Polyethylene-polyamide blends: new materials from recycled polymers using novel thermoplastic block copolymers as compatibilizers


Pag. 92-92

Tanasa Fulga1, Busko Natalya2, Zanoaga Madalina1, Barantsova Antonina2, Grişcenco V.2
 
1 “Petru Poni” Institute of Macromolecular Chemistry,
2 Institute of Macromolecular Chemistry of the NAS of Ukraine, Kyiv
 
Disponibil în IBN: 15 aprilie 2021


Rezumat

The use of polymer waste is an extremely pressing problem and recycling polymer waste is essential to our society due to economic and environmental reasons. As more people become aware of recycling, it is important to understand that recycling is not all the same. William McDonough [1] defines recycling as a sum of three different processes: upcycling, true recycling and downcycling. Upcycling is defined as taking something that is disposable and transforming it into something of greater use and value. True recycling turning material into the exact same product. Downcycling is turning a scrap into a product of lesser quality that ultimately becomes waste. So far, most of the applications were downcycling, i.e., these polymeric wastes were used in secondary products like modifying asphalt, landfill, energy recovery, etc. Several studies have aimed to apply these recycled materials and polymeric waste for value-added goals (upcycling). Among the most voluminous polymer waste, polyolefins (LDPE, HDPE, PP, etc.), polyamides, PET, and scrap automobile tires are in a greater abundance. All of them offer significant opportunities for material recovery applications and upcycling as an alternative to virgin raw materials. Block copolymers (BCPs) are fascinating materials that can form a wide variety of self-assembled structures. Their preference to phase-separate from one another on a nanometer scale can lead to distinct physical and chemical properties. A wise choice of components and method of synthesis offers the possibility to tailor the properties of the final block copolymers. Due to their improved characteristics compared to the originating co-monomers, these materials can potentially be less costly substitutes for already existing materials. Currently, block copolymers are used in a wide variety of applications. Among the various types of block copolymers, polyamide–dienic rubber ones are of increasing technical and scientific interest due to their specific properties and applications [2]. Our research is focused on the possibility to upcycle some polymer waste and obtain new composite materials with modulated/tailored properties, to identify new potential applications or to expand the limits of the classic ones. This paper is dealing with the preparation and characterization of new polymeric materials obtained using polymeric waste, recycled polyethylene (RPE) from agriculture foils and polyamide fibers (PA) recovered from scrap automobile tires, and two novel polyamide–dienic rubber block copolymers (AB and ABA) as compatibilizers. These blends were obtained by melt extrusion and compression molding. The PA component was dryed prior to processing in order to ensure an improved adhesion between PA fibers and the other components. The main purpose of this paper is understanding the effect of the AB and ABA content and structure on the morphology and properties of these blends. Their morphology strongly affects the mechanical characteristics. The compatibilized blends have a finer morphology and the compatibilizer is assumed to be located at the blend interface, where it is supposed to help to the decrease of the high stress concentrations around the dispersed particles by local plastic deformation. Another factor affecting the properties of these new materials is the amorphous/crystalline ratio. The increase of amorphous structures in the blends structure favors their impact strength, but it has an unfavorable effect on the tensile strength.