材料科学与纳米材料学报

抽象的

The note on deconstruction of a polymer

Tun Seng Herng

Polymers are everyplace. Just look around. Your plastic water bottle. The silicone rubber tips on your phone’s ear buds. The nylon and polyester in your jacket or lurkers. The rubber in the tires on the family auto. Now take a look in the glass. Numerous proteins in your body are polymers, too. Consider keratin (KAIR-uh- drum), the stuff your hair and nails are made from. Indeed the DNA in your cells is a polymer.

By description, polymers are large motes made by relating (chemically linking) a series of structure blocks. The word polymer comes from the Greek words for “numerous corridor.” Each of those corridors is scientists call a monomer (which in Greek means “one part”). Suppose of a polymer as a chain, with each of its links a monomer. Those monomers can be simple — just a snippet or two or three — or they might be complicated ring- shaped structures containing a dozen or further tittles.

In an artificial polymer, each of the chain’s links will frequently be identical to its neighbors. But in proteins, DNA and other natural polymers, links in the chain frequently differ from their neighbors.

In some cases, polymers form raying networks rather than single chains. Anyhow of their shape, the motes are veritably big. They’re so big, in fact, that scientists classify them as macromolecules. Polymer chains can include hundreds of thousands of tittles — indeed millions. The longer a polymer chain, the heavier it’ll be. And, in general, longer polymers will give the accoutrements made from them a advanced melting and boiling temperature. Also, the longer a polymer chain, the advanced its density (or resistance to inflow as a liquid). The reason they’ve a lesser face area, which makes them want to stick to bordering motes.