| 查看: 523 | 回复: 4 | |||
| 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】 做聚合的朋友帮我看看
|
|||
|
做过聚合的朋友帮我看下下面这段有关聚合的过程，我有几个问题想请教： A typical polymerization was carried out according to the following procedure. Succinic acid (44.9 g, 0.38 mol) and isosorbide (63.4 g, 0.43 mol) were weighed into a 250 mL round-bottom glass flange reactor. The reactor was fitted with a Vigreux column and a Dean- Stark-type condenser to collect the condensation product. During the first part of the synthesis, the setup was continuously flushed with inert gas to limit oxidation and facilitate transport of water vapor. While being stirred, the mixture was heated to 180 °C using a heating mantle. Titanium(IV) n-butoxide (0.02 mol % relative to succinic acid), dissolved in toluene, was added to the melt. Subsequently, the reaction temperature was increased stepwise to maintain distillation of the formed water. The maximum reaction temperature was 250 °C. After 4 h, vacuum processing was started at 230-250 °C, with typical pressures ranging from 1 to 5 mbar. Vacuum was applied for 4 h, after which the polymer was discharged from the reactor and left to cool and solidify. 其中的“Vigreux column 和a Dean-Stark-type condenser”中文是什么意思，因为我想搭装置，要准备这些东西； 另外还想问，他反应完要抽真空，我看真空度要达到1-5mbar，这应该要用油泵抽的吧，可是这反应体系中会有水和一些小分子量的聚合物，抽到油泵中会损害油泵，这中间需要加一些什么东西来过滤或者冷凝呢，请高手们指教 [ Last edited by wizardfox on 2008-9-10 at 15:09 ] |
回复此楼» 猜你喜欢
材料科学与工程求调剂
已经有3人回复
-
289求调剂
已经有5人回复
-
329求调剂，一志愿西北工业大学，材料工程（085601）
已经有6人回复
-
化学工程085602 305分求调剂
已经有21人回复
-
26申博自荐
已经有5人回复
-
296求调剂
已经有5人回复
-
总分293求调剂
已经有10人回复
-
材料专硕调剂
已经有3人回复
-
调剂310
已经有12人回复
-
化学0703 调剂 306分 一志愿211
已经有6人回复
» 本主题相关商家推荐: (我也要在这里推广)
chensthjkl
铁虫 (著名写手)
- 应助: 1 (幼儿园)
- 金币: 51.8
- 散金: 10
- 红花: 2
- 帖子: 2831
- 在线: 147.9小时
- 虫号: 261404
- 注册: 2006-06-24
- 性别: GG
- 专业: 高分子材料的加工与成型
3楼2008-09-10 12:16:10
chensthjkl
铁虫 (著名写手)
- 应助: 1 (幼儿园)
- 金币: 51.8
- 散金: 10
- 红花: 2
- 帖子: 2831
- 在线: 147.9小时
- 虫号: 261404
- 注册: 2006-06-24
- 性别: GG
- 专业: 高分子材料的加工与成型
2楼2008-09-10 12:14:53
yuyang031985
金虫 (正式写手)
- 应助: 1 (幼儿园)
- 金币: 1020.1
- 散金: 22
- 红花: 3
- 帖子: 372
- 在线: 166.9小时
- 虫号: 328822
- 注册: 2007-03-22
- 性别: GG
- 专业: 药物学其他科学问题
4楼2008-09-13 17:05:51
polywind
木虫 (正式写手)
铁杆木虫
- PEPI: 1
- 应助: 10 (幼儿园)
- 金币: 2896.2
- 散金: 844
- 红花: 8
- 帖子: 715
- 在线: 128.1小时
- 虫号: 340442
- 注册: 2007-04-07
- 性别: GG
- 专业: 高分子合成化学
5楼2008-09-13 20:56:05
20