Plastic soda bottle

Heft) can protect brassicas from bird damage. For younger plants, individual cloches made from old plastic soda bottles right) keep off birds and, if pressed into the soil, protect against slugs. 

Large pot (or sink), water, small plastic soda bottle (the 20-ounce size works nicely), film canister with lid, sharp knife, baking soda, vinegar, long wooden match, assistant... 

Polyethylene Terephthalate (PET) A plastic resin of the polyester family and one of the most common thermoformed plastics. Plastic soda bottle are a common PET product. PET is also fully recyclable. 

Think about this Does volume decrease as pressure increases A plastic soda bottle can hold a volume of 20 ounces. If a bottle was emptied of its contents and then flattened by having someone jump on it, how many ounces of liquid would the soda bottle hold now ... 

One simple idea is that styrenic block copolymers are almost never used as a stand-alone 100% neat polymer for any application or use. We tend to think about polymers in terms of this plastic soda bottle is polyester, or this carpet fiber is polyamide, or this house siding is PVC, or this garbage bag film is polyethylene , fully understanding and meaning that virtually 100% of the named object is that polymer. Our brains usefully process the named polymer properties set (as neat polymer) into the desired and required property set for its application. Life is simple in the 100% world. It is intuitive, and what we seem to know makes sense, looking either way properties wise, to why this polymer is used for this application. 

Polyesters are formed by step-growth polymerization using nucleophilic acyl substitution reactions, as we learned in Section 22.16B. For example, the reaction of terephthalic acid and ethylene glycol forms polyethylene terephthalate (PET), a polymer commonly used in plastic soda bottles. Polyethylene terephthalate is also sold as Dacron, a lightweight and durable material used in textile manufacturing. 

Remove the label from a twenty-fluid-ounce (590-milliliter) clear plastic soda bottle, rinse it out, and shake out any excess water. Find a cork that fits snuggly into the bottle opening and make certain it seals the bottle well without needing to jam it in. As extra insurance, pull a balloon over the cork (put the cork inside the balloon) so that you have a rubber-coated cork that will make a nice tight seal with the top of the soda bottle. 

Have a sink or tub full of ice-cold water ready. Take a plastic soda bottle, fill it with hot tap water, and let the hot water sit in it for several seconds. Pour out the water and quickly screw on the cap. Put the capped... 

Measure the mass of the dry plastic soda bottle and cap. Record the mass in the data table (bottle + air). Record both the barometric pressure and the air temperature. 

In 1993, collaboration between Patagonia and Malden Mills (now Polartec) led to the early development of recycled polyester fibre (from Wellman Inc.) for use in Synchilla fleece made from plastic soda bottles that diverted waste from landfills. Later, PCR filament yam was made for linings and shell fabrics from 30% to 50% post-consumer materials (bottles, polyester uniforms, tents and garments) with the remainder sourced from post-industrial waste. Clothes, at end of life, if constituted from one fibre type, can be recyclable. In theory, consumers may return a polyester garment to be forwarded to a processor to be re-made into fibre or downgraded to other forms of plastic. 

Patagonia has recycled over 86 million plastic soda bottles in making postconsumer recycled (PCR ) clothing such as this women s Synchilla jacket and notes that no synchillas are harmed in producing their clothing line. 

The largest use for PET is for fibers. Much clothing and carpeting is made from PET fibers. Another large use for PET is plastic water bottles and plastic soda bottles. There are many other uses for PET film is another major appU-cation. North American polyethylene terephthalate capacity is estimated to be 10.3 billion pounds [12]. 

Most plastic soda bottles are made from polyethylene terephthalate (PET) (Example 4D, Chapter II). One manufacturer is pushing a copolymer in which some of the ethylene ycol is replaced by cyclohexanedimethanol (CHDM) for that application. What advantage(s) do you think it might have ... 

Thermoplastics are ubiquitous in modem life. They are used in products that one normally thinks of as being made out of plastic— plastic soda bottles, CD discs, children s toys, cell phone housings, grocery bags, prescription bottles, mbber duckies. However, thermoplastics are also used in products that you might not realize are made out of plastic—automobiles, washing machines, lawn mowers, chain saws. 

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