我想問, 如果urea-methanal 係only 一條chain , 咁當佢同methanal 再react 時,
多左d" cross-link", 是否都叫做urea-methanal?
如果係, 咁我係題目見到urea-methanal 時, 我應該當佢係一條chain個個,
定係complex d(有cross-link) 個個??
* 因佢地一個會melt, 一個唔melt...so 我唔知點答題目...><
THX~!!!
收錄日期: 2021-04-25 19:45:52
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20061207000051KK03983