New Form of Plastic Gets Stronger Under Stress
Like all plastics, this one has a backbone composed mostly of carbon. However, the carbon atoms are arranged in a series of triangles extending down in long chains with two bromine atoms at one point. The researchers found that the unique structure of this compound could turn “destructive” energy into “constructive” energy. But how?
When the polymer chains are tugged or experience shock, they tear on one side. Other plastic polymers would not be so uniformly damaged, leading to structural failure. However, this is only the beginning of the transformation. The shearing force breaks the triangle into a longer chain, which also frees up bonding sites at the bromine locations for a second molecule to come in.
The researchers included a molecule called a carboxylate in this plastic to utilize those bonding sites. This cross-links multiple chains and increases the material’s strength at the site of damage. Because this material reacts to mechanical force instead of light, heat, or chemical exposure, it is called a mechanophore.
Yee Sookyung: Translated Vases
reconstructed ceramic fragments
"If you’re good at it, self-generated thought [mind wandering] can be life-affirmingly constructive."
Advertisers spend heaps of cash on branding, bannering, and product-placing. But does anyone really look at those ads? Google could be betting that advertisers will pay to know whether consumers are actually looking at their billboards, magazine spreads, and online ads. The company was just granted a patent for “pay-per-gaze” advertising, which would employ a Google Glass-like eye sensor in order to identify when consumers are looking at advertisements in the real world and online.
Worms, search engines and porn filters-the history of molecular biology might have been very different
Richard P Grant: If David Cameron’s porn filters had been active in 2003, the history of molecular biology might have been very different