Green polyethylene

Braskem is a large petrochemical company in Brazil and it initiated the green polyethylene project on April 22, 2009, with an investment of R 500 million. 

Business News Americas (2009) Dow, Santelisa postpone green polyethylene project, 5 February 2009, http //www. bnamericas.com /news /petrochemicals / Dow, (accessed 11 December 2010). 

Braskem (2007) Braskem Has the First Certified Green Polyethylene in the World, Press Release 21 June 2007 www. braskem.com.br. 

Lazer pyrogram of (a) green polyethylene, (b) black polyethylene, (c) saran, (d) teflon. From Folmer et al with permission. American Chemical Society... 

Braskem Confirms Investment to Produce 200 kton/year of Green Polyethylene, 30/10/2007, Press release, http //www.braskem.com.br/site/portal braskem/en/sala de imprensa/sala de imprensa detalhes 6970.aspx (accessed 5 May 2009). 

Braskem. (2012). Green Products—Braskem. In Green Polyethylene (Green PE). Retrieved from www.braskem.com.br/site.aspx/green-products-USA. Accessed 23 March 2012. 

Polyethylene terephthalate [25038-59-9] (8) is a polyester produced by the condensation polymerization of dimethyl terephthalate and ethylene glycol. Polyethylene terephthalate sutures are available white (undyed), or dyed green with D C Green No. 6, or blue with D C Blue No. 6. These may be coated with polybutylene adipate (polybutilate), polyydimethylsiloxane, or polytetrafiuoroethylene [9002-84-0]. The sutures are distributed under the trade names Ethibond Exel, Mersdene, Polydek, Silky II Polydek, Surgidac, Tevdek II, Polyester, and Tl.Cron. 

Nylon-6 [25038-54-4] (9) is made by the bulk addition polymerization of caprolactam. Monofilament Nylon-6 sutures are avadable undyed (clear), or in post-dyed black (with logwood extract), blue (ED C Blue No. 2), or green (D C Green No. 5). Monofilament nylon-6 sutures are sold under the trade names Ethilon and Monosof monofilament nylon-6,6 sutures, under the trade names Dermalon and Ophthalon and monofilament polyethylene terephthalate sutures, under the trade name Surgidac. 

Ethene is used to make a host of organic compounds it is also the starting material for the preparation of polyethylene (Chapter 23). Since it is a plant hormone, ethene finds application in agriculture. It is used to ripen fruit that has been picked green to avoid spoilage in shipping. Exposure to ethene at very low concentrations produces the colors we associate with ripe bananas and oranges. 

Figure 5. Fluorescence of collagen IV conjugated with Oregon Green 488 (Molecular Probes, Eugene, OR, USA.) spontaneously adsorbed to unmodified polyethylene foils (A) or polyethylene modified with 1014 0+ ions/cm at the energy of 30 keV (B). Collagen was diluted in phosphate-buffered saline to the concentration of 0.02 mg/ml (10 pg/cm ) and incubated with the foils for 24 h at room temperature. For auto fluorescence control.

The process developed at CPRR is said to be similar in its layout to those used in private industry. Most plastic reclamation systems are designed to work with rigid containers, such as PET beverage bottles, and HDPE milk or household product containers, because they are currently the easiest postconsumer items to collect and sort. PET beverage bottles are actually not one, but several materials a PET body (clear or green), a pigmented high-density polyethylene (HDPE) base cup, aluminum cap, label, and adhesives. To separate these components, either a dry or wet separation method based on one or more of the different physical properties of the materials can be used. 

Polyethylene glycols and their monomethyl ethers are inexpensive, thermally stable, recoverable, and nontoxic, and can be used as green solvents for various transformations [82] including Knoevenagel condensations [83-85]. 

---