Polypropene plastics

The scale of consumption of polyethene and polypropene plastics in Western countries and some of the uses of these materials are listed in Table 123. For their contributions which have made such a mark on the plastics industry Karl Ziegler and Giulio Natta were jointly awarded the Nobel Prize for Chemistry in 1963. 

The metal tube is a multiple-use container sealed with a moisture-proof closure. The tablets are stacked on top of one another. Consequently, a minimum of air surrounds them. The tubes are seamless, extruded aluminum packages. They are closed by tightly fitting plastic snap caps that contain a desiccant chamber. Tubes of plastic materials, such as polyvinyl chloride or polypropene, have been tested with effervescent tablets. Acceptable stability was obtained with some of these products. Plastic tubes are used more often due to their lower cost and lower noise level during the packaging operation. 

The present authors have developed procedures for collection and storage of urine and fecal specimens as follows 24 h urine specimens are collected in plastic containers (Scientific Products, McGraw Park, IL) and the total volume is recorded. A 10 mL aliquot is transferred to a polypropene tube (Falcon, Oxnard, CA) which is stored at 4°C. 

PP known as polypropene, is one of those most versatile polymers available with applications, both as a plastic and as a fibre, in virtually all of the plastics end-use markets. Professor Giulio Natta produced the first polypropylene resin in Spain in 1954. Natta utilised catalysts developed for the polyethylene industry and applied the technology to propylene gas. Commercial production began in 1957 and polypropylene usage has displayed strong growth from this date. PP is a linear hydrocarbon polymer, expressed as... 

Polypropylene n. Poly(l-propene) A plastic polymer of propylene (03 45). Similar to polyethylene, but each unit of the chain has a methyl group attached. It is translucent, autoclavable, and has no known solvent at room temperature. A polymer of propylene (propene). Abbreviation PP. also called polypropene. 

The polyolefins production has increased rapidly in the 40 years to make polyolefins the major tonnage plastics material worldwide. In 2003, 55 million tons of polyethene and 38 million t/a polypropene were produced [1]. These products are used for packing material, receptacles, pipes, domestic articles, foils, and fibers. Polyolefins eonsist of carbon and hydrogen atoms only and the monomers are easily available. Considering environmental aspects, clean disposal can be achieved by burning or by pyrolysis, for instance. Burning involves conversion to CO2 and H2O, exclusively. 

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