Issue about chemical problem

[匿名]

2008-05-19 2:44 am

Is there any different between urethan, urethane and polyurethanes?

It is urgent question. Thank you for your help.

10000 times thank you very much.

回答 (1)

Uncle Michael

2008-05-19 3:45 am

✔ 最佳答案

Urethan:
Urethan is a word in German. It is equivalent to “urethane” in English.

Urethane:
Urethane is also known as ethyl carbamate. Its systematic name is ethyl aminomethanoic acid. The structure of urethane is shown below:

圖片參考：http://www.chemblink.com/structures/51-79-6.gif

Polyurethane:
Polyurethene is NOT produced by ethyl carbamate (urethane).
Polyurethanes are a group of polymers. A polyurethane (PU), is any polymer consisting of a chain of organic units joined by urethane links. The structure of one of polyurethanes is shown below:

圖片參考：http://dwb.unl.edu/Teacher/NSF/C06/C06Links/qlink.queensu.ca/~6jrt/chem210/pict11.jpg

參考: http://en.wikipedia.org/wiki/Ethyl_carbamate; http://en.wikipedia.org/wiki/Polyurethane;

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