Advantages of plastics

The principal advantage of plastic dmms and liners is their resistance to corrosion. This aspect of their performance requires the lading to be investigated in terms of capacity for chemical attack on the dmm. Stress-cracking tests should be performed in all instances where the compatibiUty of jading and dmm material has not been estabUshed (6). 

The PSA formulator can also take advantage of plasticizers. For example, polyether-based plasticizers have both good low-temperature flexibility and good hydrophilicity. Using these properties, acrylic PSAs have been formulated with these types of plasticizers to obtain high adhesion to food packages stored under refrigerated conditions [102]. Similarly, polyether plasticized acrylics have been used to make repulpable PSAs [103]. 

Ready to use thin-layers (i.e. pre-coated plates or plastic sheets) are commercially available the chief advantage of plastic sheets is that they can be cut to any size or shape required, but they have the disadvantage that they bend in the chromatographic tank unless supported. 

One of the major advantages of plastics optical elements is that they can me made by different processes such as injection molding, casting, or extrusion to good accuracy at low cost. Some glass lenses are pressed from hot glass but the majority of the lenses... 

Currently, these tests are of no practical value to the designer and the only approach to the problem of scratch, mar, and abrasion resistance is to simulate actual performance needs. For optical purposes, a cast sheet in the allyl family of plastics known as CR39 has been used as a standard of comparison in evaluating scratch and mar resistance of a material. The CR39 is used for eye lenses and other optical products where the advantages of plastics are a consideration. Coatings have been developed for polycarbonate, acrylics, and other plastics that dramatically improve the scratch and mar resistance of these materials. 

As an example we present here some computation results for the plasma treatment of the hospital patients room waste with advantage of plastics, cellulose and non-organic metal and glass parts. To check the efficiency of gas fuel generation from this waste we have simulated the limited oxidation within temperature range 1000 - 2500 °C. We have assumed that in 1kg of dry waste are (by weight) 60% of plastics, 15% of silicon glass, and 10% of... 

Hybrid materials are often a good solution to take advantage of plastics and one or several other conventional materials. This principle, in more or less complex versions, is applied to the front-ends of recent cars, footbrake pedals, aircraft wheels, car doors, etc. 

Plastics have both advantages and disadvantages Advantages of plastics Plastics... 

A distinct advantage of plastic pyrolysis into fuels as a means of recycling is its ability to handle mixed and unwashed plastics. Post-consumer plastics are often commingled and contaminated with extraneous materials such as soil, dirt, aluminium foils, paper labels and food remnants. While soil, dirt and glue can be removed from post-consumer plastics by washing, this is a fairly expensive operation and it leads to secondary waste streams... 

Gajanan Bhat (The University of Tennessee in Knoxville) who contributed the chapter on Processing of Post-Consumer Recycled Plastics, writes, Plastics continue to replace traditional materials in many applications and are being used in several new products. Many advantages of plastics in their performance as well as in the ease of their fabrication have contributed to their growth. Since... 

As compared to metallic compounds used as shape memory materials, shape memory polymers have low density, high shape recoverability, easy processability, and low cost. Since the discovery by Mitsubishi in 1988, polyurethane SMPs have attracted a great deal of attention due to their unique properties, such as a wide range of shape recovery temperatures (— 30°C to 70°C) and excellent biocompatibility, besides the usual advantages of plastics. A series of shape memory polyurethanes (SPMUs), prepared from polycaprolactone diols (PCL), 1,4-butanediol (BDO) (chain extender), and 4,4 -diphenylmethane diisocyanate (MDI) or toluene diisocyanate (TDI) have recently been introduced [200—202]. 

The use of nonwood materials in building and construction has been stimulated by the escalating prices of wood construction products. However, a key factor in the growth of plastics in residential construction is consumer acceptance. The advantages of plastics over conventional materials, including improved quality, reduced installation cost, better appearance, durability, and low maintenance requirements, have hastened their acceptance. 

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