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Polyethylene commercial design

The molecular design of stereospecific homogeneous catalysts for polymerization and oligomerization has now reached a practical stage, which is the result of the rapid developments in early transition metal organometallic chemistry in this decade. In fact, Exxon and Dow are already producing polyethylene commercially with the help of metallocene catalysts. Compared to the polymerization of a-olefins, the polymerization of polar vinyl, alkynyl and cyclic monomers seems to be less developed. [Pg.45]

The successful development of the required plant was no small achievement, involving the design of a reaction vessel capable of withstanding a pressure of 22,500 psi. A pilot plant was established in 1937, and by the ontbreak of World War II, ICI was producing polyethylene commercially. Even before the first commercial unit came on-stream, it was recognized that it wonld not meet the expected demand. A newer and bigger line was commissioned, which went into production in 1942. [Pg.29]

In most countries between 50% and 70% of the polyethylene film produced is sold in printed form, either on-the-reel or as bags. The preparative treatment used most frequently in this type of work is electrical discharge and a varied range of units for the purpose is available commercially—differing in design but... [Pg.225]

DuPont offers a family of biodegradable polymers based on polyethylene terephthalate (PET) technology known commercially as Biomax. Proprietary monomers are incorporated into the polymer, creating sites that are susceptible to hydrolysis. At elevated temperatures, the large polymer molecules are cleaved by moisture into smaller molecules, which are then consumed by naturally occurring microbes and converted to carbon dioxide, water and biomass. Biomax can be recycled, incinerated or landfilled, but is designed specifically for disposal by composting. [Pg.91]

However, one of our customers (27) found it to be an effective additive to polyethylene terephthalate in order to increase the strength and reduce the striation when the polymer was extruded into polyester film. This certainly was an unexpected commercial success. I would regard this commercial success as pure luck on our part. After all. Dr. Walsh s group designed the compound to be a flame retardant. [Pg.324]

Uniaxial creep experiments were carried out on two types of commercial polyethylene In the presence of various environments. One polymer, which will be designated hereafter as sample D, was a linear polyethylene having a weight-average molecular weight (My) of 99,000 and a nominal density of 0.966 g/cm. ... [Pg.289]


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