A new species of darkling beetle larvae that degrade plastic

An enormous plastic garbage island exists in the North Pacific that is seven times the size of the Korean Peninsula. The island, called the Great Pacific Garbage Patch, is the result of 13 million tons of plastic that flow ...

Breaking down ocean polystyrene—pollution on a global scale

A walk along the beach is a favourite way to connect with nature and, ideally, offers the opportunity to escape the flotsam and jetsam of everyday life. Unfortunately, most of us lucky enough to have access to the coast are ...

Expandable foam for 3-D printing large objects

It's a frustrating limitation of 3-D printing: Printed objects must be smaller than the machine making them. Huge machines are impractical for printing large parts because they take up too much space and require excessive ...

How big a problem is ocean polystyrene pollution?

If you've been to the beach, you're familiar with the joys of beach food—all the way from shaved ice raspados in Mexico to fish and chips in England. And in many cases these treats come bundled up in plastic. A particularly ...

Sunlight degrades polystyrene faster than expected

A study published by researchers at Woods Hole Oceanographic Institution (WHOI) shows that polystyrene, one of the world's most ubiquitous plastics, may degrade in decades or centuries when exposed to sunlight, rather than ...

Shrink films get a grip

Many people fondly remember playing with toys known as Shrinky Dinks—sheets of polystyrene plastic with shapes that kids can color, cut out and heat in an oven, where they shrink into thicker pieces of plastic. Now, researchers ...

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Polystyrene

Polystyrene ( /ˌpɒliˈstaɪriːn/; IUPAC poly(1-phenylethene-1,2-diyl)) also known as Thermocole, abbreviated following ISO Standard PS, is an aromatic polymer made from the monomer styrene, a liquid hydrocarbon that is manufactured from petroleum by the chemical industry. Polystyrene is one of the most widely used plastics, the scale being several billion kilograms per year.

Polystyrene is a thermoplastic substance, which is in solid (glassy) state at room temperature, but flows if heated above its glass transition temperature of about 100 °C (for molding or extrusion), and becomes solid again when cooled. Pure solid polystyrene is a colorless, hard plastic with limited flexibility. It can be cast into molds with fine detail. Polystyrene can be transparent or can be made to take on various colors.

Solid polystyrene is used, for example, in disposable cutlery, plastic models, CD and DVD cases, and smoke detector housings. Products made from foamed polystyrene are nearly ubiquitous, for example packing materials, insulation, and foam drink cups.

Polystyrene can be recycled, and has the number "6" as its recycling symbol. The increasing oil prices have increased the value of polystyrene for recycling. No known microorganism has yet been shown to biodegrade polystyrene, and it is often abundant as a form of pollution in the outdoor environment, particularly along shores and waterways especially in its low density cellular form.

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