h**i 发帖数: 8 | 1 if a large scale of polymer has been dissolve in nonpolar solvent and washed
by water, the polymer would be contain small trace of water in it. Anyone
suggest a way to remove the trace of water by a simple method without
bringing any chemical change? Thanks. |
c******h 发帖数: 4573 | 2 polymer在多少度下稳定?
真空烘箱,搞到180度,烘个3天。
washed
【在 h**i 的大作中提到】![](/moin_static193/solenoid/img/up.png) : if a large scale of polymer has been dissolve in nonpolar solvent and washed : by water, the polymer would be contain small trace of water in it. Anyone : suggest a way to remove the trace of water by a simple method without : bringing any chemical change? Thanks.
|
m*****e 发帖数: 1506 | 3 dissolve in CH2Cl2 (or other solvents), dy over Na2SO4, remove solvent, dry
in vacuo.
washed
【在 h**i 的大作中提到】![](/moin_static193/solenoid/img/up.png) : if a large scale of polymer has been dissolve in nonpolar solvent and washed : by water, the polymer would be contain small trace of water in it. Anyone : suggest a way to remove the trace of water by a simple method without : bringing any chemical change? Thanks.
|
g*****l 发帖数: 130 | |
h**i 发帖数: 8 | 5 好几个人告诉我用CH2Cl2请问这是为什么呢?它和别的比如hexane比有什么好处,是会
把水带出来吗?谢谢!
dry
【在 m*****e 的大作中提到】![](/moin_static193/solenoid/img/up.png) : dissolve in CH2Cl2 (or other solvents), dy over Na2SO4, remove solvent, dry : in vacuo. : : washed
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m*****e 发帖数: 1506 | 6 CH2Cl2和水不互溶,而且沸点低,是polymer的常用溶剂
【在 h**i 的大作中提到】![](/moin_static193/solenoid/img/up.png) : 好几个人告诉我用CH2Cl2请问这是为什么呢?它和别的比如hexane比有什么好处,是会 : 把水带出来吗?谢谢! : : dry
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