| 查看: 559 | 回复: 3 | ||||
| 当前主题已经存档。 | ||||
[交流]
【请教】 大家说说这句英文实验时具体该怎么操作?ATRP聚合!!!
|
||||
|
The mixture was stirred for 10 min and then degassed by three freeze-pump-thawcycles. The flask was placed in a water bath maintained at 25℃ , Finally, p-TsCl (0.0076 g, 0.040 mmol) was added. ATRP聚合时,三次冷冻-解冻循环后,如何将固体的引发剂顺利加入又不带入空气? 我试过配成溶液,除氧后注入,用乙醇溶解的p-TsCl ,结果引发不了 大家帮我分析一下,谢谢啦 [ Last edited by wellok101 on 2008-3-13 at 14:31 ] |
回复此楼» 收录本帖的淘帖专辑推荐
 ATRP经验 |
» 猜你喜欢
申博发邮件
已经有8人回复
-
各位大神，目前国内有哪些比较好用的逆合成软件？
已经有9人回复
-
国社科系统bug了，是不是要放榜了？
已经有7人回复
-
上海工程技术大学激光智能制造课题组｜2027级博士研究生招生公告
已经有8人回复
-
上海工程技术大学激光智能制造课题组招收博士研究生
已经有8人回复
|
A typical polymerization is described. CuCl (0.0119 g, 0.120 mmol) was added to a dry 50 mL Schlenk flask with a magnetic stirring bar, and the Schlenk flask was evacuated and flushed with argon. Distilled DMAEMA (21.0 mL, 125 mmol), HMTETA (0.0326 mL, 0.120 mmol), degassed methanol (13.0 mL) and distilled water (2.0 mL) were added to the Schlenk flask using degassed syringes. The mixture was stirred for 10 min and then degassed by three freeze-pumpthaw cycles. The flask was placed in a water bath maintained at 25G0.2 8C. Finally, p-TsCl (0.0076 g, 0.040 mmol) was added. The reaction mixture was stirred for 10 h. The polymerization was terminated by exposing the reaction vessel to air and 10 mL of THF was added. The solution was passed through a basic alumina column and eluted with additional 100 mL of THF. The volume of the solution was reduced using a rotary evaporator and the concentrated solution was poured into hexane for precipitation, yielding a polymer with Mn,GPCZ410,000, PDIZ1.18 and 81% monomer conversion. |
2楼2008-03-13 02:44:56
3楼2008-03-13 08:40:07
reiner
木虫 (小有名气)
- 应助: 4 (幼儿园)
- 金币: 3120.6
- 帖子: 81
- 在线: 193.5小时
- 虫号: 299573
- 注册: 2006-11-25
- 性别: GG
- 专业: 高分子合成化学
4楼2008-03-13 14:20:08