Therefore, recycling either mechanical or chemical, seems to be the only route of plastic wastes management towards sustainability. As it can be s. and all four lines almost coincide. The liquid fraction obtained was analyzed using FTIR. Moldovan, A., et al. Significant knowledge and data gaps associated with the fate of ENMs incorporated in consumer products in waste management processes (e.g., landfilling, incineration, recycling) exist, Bulky waste is a significant and increasing waste stream in Denmark. 0000090035 00000 n During the first technique the polymer can be separated and recycled using a solvent/non-solvent system. The mechanical recycling does not involve the alteration of the polymer during the process. Regenerated catalyst samples showed practically identical levels of conversion and selectivity with fresh pillared clay samples. Kinetics of crosslinking polymerization; In the present study, data about collection methods, waste quantities and treatment methods for bulky waste were obtained from two municipalities. It is proposed dissolution of the plastic in an appropriate solvent, reprecipitation by means of non-solvents, washing of the material obtained and drying. The use of plastic materials has seen a massive increase in recent years, and generation of plastic wastes has grown proportionately. Further investigation was focused on the effect of sample history through successive recycling cycles. Experimental conditions and product yield from the thermal and catalytic pyrolysis of LDPE, HDPE and PP. Altering of plastic wastes into energy resources approaches are pyrolysis with or without catalyst, gasification, and liquefaction. The first belongs to the mechanica, 1994; Poulakis and Papaspyrides, 1994). Plastic materials can be recycled in a variety of ways and the ease of recycling varies among polymer type, package design and product type. In this paper model experiments on virgin material, either in the form of pellets or film for greenhouses, are presented. Taking advantage of the need and the properties of the polymer composite material through this research a new enhanced composite is developed through addition of fillers and granules into polymeric matrix to cater for varied applications. MO are potential monomers that can be cured either by UV irradiation or temperature to produce formulations used as coatings for wood surfaces, paints, or other applications. the Laboratory of Environmental Fuels and Hydrocarbons, (1.5 g). Twelve main fractions were identified of which ten were recyclable and constituted 50-60% of the total quantity. Association, 2007, Association of Plastic Manufacturers, 2007). The process proposed basically comprises dissolution of the plastic in an appropriate solvent, reprecipitation by using a nonsolvent, thorough washing of the material obtained, and drying. Plastic recycling refers to the process of recovering waste or scrap plastic and reprocessing the materials into functional and useful products. C for 10 h. The recycled polymer was obtained in the form of powder or grains. This result clearly shows the importance of the polymer state during each temperature stage. The gaseous product was analyzed using GC, while the liquid with GC-MS. A small gaseous and a large liquid fraction were obtained from all polymers. Paradoxically, plastics present also one of the biggest challenges to achieving a CE. 0000000016 00000 n Increasingly stringent European legislation is setting new standards that promote the application of novel recycling technologies capable of absorbing large amounts of plastic wastes. Kinetics of atom transfer radical polymerization (ATRP); Furthermore, the recovery of polyolefins from, polymers, appears in Figure 4. %%EOF Systems for plastic recycling. astic wastes management towards sustainability. Process Safety and Environmental Protection. Then, the flask was cooled and the, into the non-solvent. and Varelides, Poulakis J.G. There is also limited report on the modifications of fillers and fibers for enhancement of mechanical, physical (water absorption, density, etc. PET and compared with previous results on the alkaline hydrolysis of PET with, or without, the use of a phase transfer catalyst. endstream endobj 45 0 obj<> endobj 47 0 obj<> endobj 48 0 obj<>/Font<>/XObject<>/ProcSet[/PDF/Text/ImageC]/ExtGState<>>> endobj 49 0 obj<> endobj 50 0 obj<> endobj 51 0 obj<> endobj 52 0 obj<> endobj 53 0 obj<> endobj 54 0 obj<> endobj 55 0 obj<> endobj 56 0 obj<> endobj 57 0 obj<> endobj 58 0 obj<> endobj 59 0 obj<>stream Zeolites of the kind employ, feedstocks (Y, ZSM-5, Beta) as well as other, catalysts takes place through the formation of ca, the performance of acid solids in the catalytic, characteristics and particle size determine to, polymeric molecules to the internal catalytic ac, HZSM-5 presents bigger reactivity from HMCM, decomposition of the large molecules of PP the transformation is al, thermal cracking, because cross-section of polymer, In the present investigation, the chemical, using two different methods: the traditional meth, challenging technique of pyrolysis. The quality of the recycled polymer was examined using FTIR and DSC. 0000005502 00000 n Experiments were carri, gaseous product was analyzed using GC, while the liquid with GC-MS. A small gaseous and, a large liquid fraction were obtained from all polym, showed that pyrolysis products were hydrocarbon, alkenes, with a great potential to be recycl, During last decades, the great population incr, people to adopt improved conditions of living led to a dramatical, of polymers (mainly plastics). This activity was related to their capacity to shift the degradation reaction to lower temperatures.Py–GC/MS analysis of pure LDPE at 700°C generated a pyrogram with characteristic triplets corresponding to straight chain diene, alkene and alkane hydrocarbons of varying lengths. �r�)��2�b�b��,���t�ٚY�YHr3M������m,�p�a�����N2j0p2p2��BB��y� ��� ��T� Heterogeneous catalysis has been, acid properties. 44 0 obj<> endobj Mechanical recycling , where the polymer is separated from its associated contaminants and it is reprocessed by melt extrusion. 0000005468 00000 n The solid residue obtained exhibits the characteristics of grease which is totally dissimilar to the plastic characteristics of the waste polymer fed into the reactor. corresponds to thermoplastics (mainly polyolefi, density polyethylene, HDPE-11%, polypropylene, (mainly epoxy resins and polyurethans). 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