| 查看: 949 | 回复: 14 | |||
| 当前主题已经存档。 | |||
| 当前只显示满足指定条件的回帖,点击这里查看本话题的所有回帖 | |||
[交流]
【求助】甲基丙烯酸-b-苯乙烯沉淀剂选择
|
|||
| 请问甲基丙烯酸-苯乙烯嵌段用什么沉淀剂, 我看文献上说是二氯甲烷,可我试了下, 只是浑浊沉淀不下来 |
bravestone
木虫 (正式写手)
- 应助: 0 (幼儿园)
- 金币: 1612.2
- 帖子: 309
- 在线: 102.6小时
- 虫号: 93723
- 注册: 2005-09-15
- 性别: GG
- 专业: 有机高分子功能材料
★ ★
小木虫(金币+0.5):给个红包,谢谢回帖交流
huobingyao(金币+1,VIP+0):鼓励交流~ 12-30 08:56
小木虫(金币+0.5):给个红包,谢谢回帖交流
huobingyao(金币+1,VIP+0):鼓励交流~ 12-30 08:56
|
In which solvent is your block copolymer dissolved? The concentration is important for the precipitation of your polymer. Sometimes when the concentration is too low, they just form very fine particles, but not big precipitations. In this case, you need to centrifugate your solution to get the solid. You can even try acidic water(pH lower than 3), if your polymer was dissolved in DMF or other polar solvent. Acetone or diethyl ether might be other choices? |
8楼2009-12-27 02:28:32
3楼2009-12-26 16:46:13
zhangfangzhi
木虫 (职业作家)
- 应助: 6 (幼儿园)
- 金币: 3777.7
- 散金: 340
- 红花: 22
- 帖子: 3234
- 在线: 3121.7小时
- 虫号: 405380
- 注册: 2007-06-17
- 性别: GG
- 专业: 应用高分子化学与物理
4楼2009-12-26 21:06:53
suixince
木虫 (正式写手)
- 应助: 3 (幼儿园)
- 金币: 3903.6
- 散金: 70
- 红花: 1
- 帖子: 585
- 在线: 222.9小时
- 虫号: 918386
- 注册: 2009-12-02
- 专业: 高分子合成化学
5楼2009-12-26 22:55:44













回复此楼