Polyethylene is a polyolefin polyolefins are high molecular weight hydrocarbons polyolefins include linear low density polyethylene, low density polyethylene, high density polyethylene, polypropylene copolymer, polypropylene, and polymethyl pentene. Polyethylene – its properties and uses polyethylene is one of the most commonly used engineering plastics its chemical resistance properties and ease of fabrication make it popular in the chemical industries. Thesis statement : although cheap, the usage of polystyrene should be avoided by us since it has so many disadvantages in our lives such as causing numerous disease, polluting the environtment and causing global warming introduction : polystyrene, an inexpensive and hard plastic, often be consumed in our surroundings without knowing the harmfull effects of it. For example, the incorporation of a phenyl (c 6 h 5) unit into the monomer leads to polystyrene, while the incorporation of a chloro (cl) group leads to pvc, a polymer with very different properties by using different fabrication techniques. These papers considered the effect on composite properties of particulate reinforcements introduced into a melted polymer matrix other types of dispersion state have not generally been considered agari and co-workers  investigated polyethylene composites filled with graphite using four dispersion methods.
Incompatible blends comprised of polystyrene and various high density polyethylenes were processed into tapes, in which both the phase and molecular orientations were parallel to the machine direction, by a combination of extrusion and mechanical stretching of the melt prior to quenching. Environmental and health hazards of chemicals in plastic polymers and products leaching tests, toxicity tests and toxicity identification evaluations (ties) were made on plastic products [i, ii], other plastic types with high demand are polystyrene and expandable 7. Abstract a description is given of a rotational elastoviscometer with a very rigid dynamometer designed for the investigation of the rheological properties of polymer melts and concentrated polymer solutions by the constant deformation rate method.
Polystyrene (ps) - polystyrene is an amorphous, glassy polymer that is generally rigid and relatively inexpensive unfilled polystyrene has a sparkle appearance and is often referred to as crystal ps or general purpose polystyrene (gpps. Blends containing equal proportions of low-density polyethylene and polystyrene were selected for this study since this composition represents the poorest balance of properties in this system graft addition generally increased both the yield strength and the elongation at break of the blend. Expanded polystyrene physical properties expanded polystyrene has a flame spread index of 20 and a smoke developed index of 150-300 when tested in accordance with astm e84/ul 723 for densities from 07 - 20 lb/ft 3.
Indian journal of biotechnology vol 7, january 2008, pp 9-22 biodegradation of polyethylene and polypropylene j arutchelvi, m sudhakar, ambika arkatkar, mukesh doble, sumit bhaduri 1 and parasu veera uppara department of biotechnology, indian institute of technology, madras, chennai 600 036, india. Dynamic mechanical properties of polystyrene/low density polyethylene blends s d sjoerdsma, j dalmolen, a c a m bleijenberg and d heikens laboratory of polymer technology, eindhoven university of technology, po box 513, 5600 mb eindhoven, the netherlands (received 22 october 1979 revised 22 february 1980) the dynamic mechanical properties of polystyrene/low density polyethylene. The mechanical and thermal properties of polymer foams vary as a function of foam density combining a stiff linear copolymer polypropylene (pp) with a branched homopolymer pp, the benefits of high melt strength and high melt elongation result in excellent foam quality. Expanded polypropylene & expanded polyethylene foam share many of the same properties as eps it is a closed cell foam, which is flexible and lightweight an environmentally-friendly product, it can be recycled easily, and is 100% non-toxic.
Polyethylene terephthalate: polyethylene terephthalate, or pet, a strong, stiff synthetic fiber and resin, and a member of the polyester family of polymers pet is spun into fibers for permanent-press fabrics, blow-molded into disposable beverage bottles, and extruded into photographic film and magnetic recording tape. Plastic: plastic, polymeric material that has the capability of being molded or shaped this property of plasticity, often found in combination with other special properties such as low density, low electrical conductivity, transparency, and toughness, allows plastics to be made into a great variety of products. Abdul azeem/textile chemical processing/ntu polyethylene it is a polymer of ethylene, ch2-ch2, having the formula (-ch2-ch2-)n, and is produced at high pressures and temperatures in the presence of any one of several catalysts, depending on the desired properties for the finished product.
Plastic is made from crude oil, so it can be broken down to liquid hydrocarbons which hydrocarbons would be dependence on the plastic type and process used polypropylene (5) is simply a synthetic polymerwhen trying to break it down, you would want to get it down to its smaller unita propylene monomer. Consumers and recyclers to identify different types of plastic manufacturers place an spi code, or number, on each plastic product, usually moulded into the bottom polystyrene is commonly recycled, but is difficult to do items plastic type general properties common household uses polyethylene. In this work, novel polyethylene-graft-maleic anhydride (pe-g-mah) and polystyrene (ps)-based blend was prepared the cellulose (cell) and cellulose modified with montmorillonite nanoclay particles (cell-clay) were employed as filler the impartial was to fabricate mechanically stable materials with enhanced morphological, mechanical, and rheological properties.