Polyethylene waste

Photodegradation of polyethylene waste can be markedly accelerated via its grafting with acrylamide [98], In contrast, photostabilization of polyethylene and polypropylene can be achieved as a result of the grafting of 2-hydroxy-4-(3-methacryloxy-2-hydroxy-propoxy) benzophenone using gamma radiation [ 147], In this case, the grafted compound acting as a U V stabilizer is chemically bound to the backbone chain of the polymer and its evaporation from the surface can be avoided. 

Xing Ji, Processes for producing oil products from polyethylene wastes. Petrochemical Technology, 18(4), 215-219 (1998). 

Xing Ji, Jialin Qian, and Jianqiu Wang, The preparation and study on the property of the catalyst for the reformation of the pyrolysis product of polyethylene waste. Environmental Chemistry, 18(5), 437-444 (1999). 

Plastic lumber is made from recycled plastic, especially soft drink bottles and polyethylene waste. 

There will not be enough air in the system to bum the polyethylene waste at that rate so the kiln will produce a dense black smoke. 

RUHRCHEMIE Oberhausen 1t/d U50°C - X - - Stirred, indirectly heated retort. For polyethylene waste. 

Ruhrchemie uses a stirred tank reactor, heated externally with molten salt for converting polyethylene waste to a fuel oil. [3U]-... 

Figure 22.20 Plastic lumber Is made from recycled plastic, such as used soft-drink bottles, milk jugs, and other polyethylene waste. 

The crosslinked polymers have been decrosslinked by ozone, which allowed their evaluation, especially in compositions with bitumens. The ozonized polyethylene wastes can be used in bitumens for reinforcement. In aU the examples dealt with, the study describes the analysis methods and the properties of the obtained materials and shows that ozonization constitutes an original way of treatment and utilization of plastic wastes. 

The amount of polyethylene wastes reaches the greatest quantity. This level is the direct consequence of worn polymers. The blends consisting of different sorts of polyethylene are usually the start-points for the recovery of used plastics. The irradiation of polyethylene blend consisting of high density and low density polyethylenes, HDPEiLDPE = 1 3, where the raw materials were postconsumer items, points out the contributive action of incidental radiation to the main characteristics of final blend state [00S4, 00S5]. 

Table 21 Modification of some characteristics of LDPE HDPE (3 1) during recycling of polyethylene wastes (y ( °Co)-irradiation dose rate 5.1 kGy.h ). The data were taken from [00S2].

Medhat M. Hassan, Raouf O. Aly, Jehan A. Hasanen, and El Sayed F. El Sayed, The effect of gcunma irradiation on mechcmical, thermal and morphological properties of glass fiber reinforced polyethylene waste/reclaim rubber composites. /. Ind. Eng. Chem. 27 (2013) (in press). 

Angyal, A., et al., 2009. Catalytic cracking of polyethylene waste in horizontal tube reactor. Polymer Degradation and Stability 94 (10), 1678—1683. 

Miskolczi, N., et al., 2004. Thermal and thermo-catal3ftic degradation of high-density polyethylene waste. Journal of Anal)4ical and Apphed Pyrolysis 72 (2), 235—242. 

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