Degradable plastic wastes

Solid waste is defined as discarded material which is no longer used in its present form or condition however, it is a resource which is potentially useful. In reality, certain types of waste may render recovery and reuse impractical, inadvisable or even unfeasible. Solid waste management reduces the negative impact that non-degradable plastics waste could have on the environment. 

As mentioned previously, biodegradable polymers can be derived from both petroleum and renewable sources. Both types of biodegradable polymers have attracted attention in the industry. Petroleum-based biodegradable polymers may help to overcome the accumulation of non-degradable plastic waste. However, renewable biodegradable polymers not only possess biodegradability, but the polymers are also derived from sustainable sources with environmental credit. 

Polymer Degradation and Stability 53,No.2, 1996,p.l89-97 THERMAL DEGRADATION OF MIXED PLASTIC WASTE TO AROMATICS AND GAS... 

PLASTIC/POLYMER DEGRADATION A ROUTE OF ECONOMIC UTILISATION AND RECOVERY OF CHEMICALS FROM POLYMER/PLASTIC WASTE... 

This article highlights the growing problem of plastics waste disposal and then investigates modes of polymer degradation - thermal, chemical, mechanical, photodegradation, bio-degradation, solvolysis andglycerolysis. 4 refs. 

In this study, post-synthetic metal grafting was used to incorporate A1 into MCM-41 (Al-MCM-41-P), which was probably the first attempt at the catalytic degradation of waste plastics. The objective of this study was to investigate the kinetic aspect of high-density polyethylene (HDPE) over Al-MCM-41-P. 

Degrade plastics (solid waste) by one of four processes biodegradation, photodegradation, chemical degradation, and hydrodegradation. 

Commercial tellurium, 24 408, 414 Commercial vaccines, 25 487 Commercial waste, 25 864 Commingled plastic wastes recycling, 21 453-456 thermal cracking of, 21 454 thermal degradation of, 21 454 Commingled recyclables, 21 368 in waste collection, 25 869-870 Comminution, 16 135... 

Did you know that the first plastics were considered too valuable to be thrown out Today, many plastics are considered disposable. Plastics now take up nearly one third of all landfill space, and society s use of plastics is on the rise. Recycling initiatives are helping to reduce plastic waste. Another solution to this problem may involve the technology of degradable plastics. 

The review is not meant to promote degradable plastics, but rather to highlight them as one possible route to a cleaner environment. In many applications, recycling of polymers or incineration of waste products may offer more protection to the environment. The final decision for any application requires careful deliberation and not emotional judgements. 

Degradable Polymers, Recycling, and Plastics Waste Management, edited by Ann-Christine Albertsson and Samuel J. Huang... 

Some authors took advantage of the reactivity of polymers with ozone to recycle some peculiar plastic wastes coming from different origins. In this way, Fargere [155, 156] succeeded in degradation of cross-linked ethylene-vinyl acetate copolymers used in the production of sport shoes. This operation was achieved on grinded industrial wastes in suspension in CC14. In a second... 

The changes in mechanical properties due to degradation and/or blending, contamination, antioxidant consumption and general use (e.g. oxidation processes) of the polymeric material during first service life are some of the characteristics that determine if the material should be recycled mechanically or disposed of in another way (e.g. energy recovery). A successful recycling is strictly dependent on the purity and uniformity of the plastic waste. 

Steinbuchel, A. (1995), in Degradable Polymers Recycling and Plastic Waste Management, Albertsson, C. and Huang, ]., eds., Marcel Dekker, New York, NY, pp. 61-68. 

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