Wednesday, July 25, 2007

I'm a plastic bag

Message from 小林方正
I'm a plactic bag. BUT, I don't chose to be one. If you key-in PLASTIC on wikipedia, you'll find this explanation of PLASTIC.
Plastics are polymers: long chains of atoms bonded to one another. Common thermoplastics range from 20,000 to 500,000 in molecular weight, while thermosets are assumed to have infinite molecular weight. These chains are made up of many repeating molecular units, known as "repeat units", derived from "monomers"; each polymer chain will have several 1000's of repeat units. The vast majority of plastics are composed of polymers of carbon and hydrogen alone or with oxygen, nitrogen, chlorine or sulfur in the backbone. (Some of commercial interest are silicon based.) The backbone is that part of the chain on the main "path" linking a large number of repeat units together. To vary the properties of plastics, both the repeat unit with different molecular groups "hanging" or "pendant" from the backbone, (usually they are "hung" as part of the monomers before linking monomers together to form the polymer chain). This customization by repeat unit's molecular structure has allowed plastics to become such an indispensable part of twenty first-century life by fine tuning the properties of the polymer.



塑胶是人所发明的。然而人类却不懂得去珍惜利用,却硬要说它不环保!这大概就是人类的劣根性,把责任都推卸到了其他的身上!

一只塑胶袋的一生尽职尽责完成了它的使命,却被人们慵懒地随意地抛弃了。

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