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】
: 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】
: 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】
: dissolve in CH2Cl2 (or other solvents), dy over Na2SO4, remove solvent, dry
: in vacuo.
:
: washed
|
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】
: 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
|
