艺术
美容与健康
工艺
文化与历史
娱乐
环境
食品与饮料
逆向工程
科学
体育
技术
可穿戴设备
Methyl Methacrylate Syrup: Partly Polymerised below 80 °C with Hydrogen Peroxide
Methyl methacrylate syrup is the monomer partly polymerised until it is thick: the stock that is poured between glass plates to cast acrylic sheet. ICI's Tattersall (US 2,071,907, 1937) heats the liquid monomer with a little catalyst, never above 80 °C, until it is syrupy, then cools it. His example used benzoyl peroxide and he names hydrogen peroxide as an alternative but gives no amount. Our choice: 14 g of 3 % hydrogen peroxide per kg of monomer, as many peroxide molecules as his 0.3 % benzoyl peroxide. Methyl methacrylate is flammable: no open flame.
The picture: our diagram.
中级
Half a day
说明
1
1
Weigh monomer and peroxide
Weigh monomer and peroxide
Weigh liquid methyl methacrylate into a round-bottom flask and add 14 g of 3 % hydrogen peroxide per kg of monomer (our amount; the patent only says a relatively small amount).
此步骤所需材料：
甲基丙烯酸甲酯1 公斤
过氧化氢（3 %）14 克所需工具：
圆底烧瓶
等臂天平
化学防溅护目镜
橡胶手套
通风柜（带排风管）2
2
Heat, never above 80 °C
Heat, never above 80 °C
Fit a reflux condenser and warm the flask in a water bath to near but not above 80 °C. Above 80 °C the finished sheet is not flawless; lower temperatures work but take longer.
所需工具：
圆底烧瓶
回流冷凝管
水浴
电热板
实验室温度计通风柜（带排风管）3
3
Stop when it is syrupy
Stop when it is syrupy
Check the thickness now and then with a glass rod. Stop when the liquid has become a syrup. The patent took its example to a molecular weight of 3000, measured by viscosity, and gives no time.
所需工具：
玻璃搅拌棒实验室温度计4
4
Cool to room temperature
Cool to room temperature
Cool the syrup to about room temperature (30 °C in the example) in cold water. It is then ready to pour between glass plates and cast into sheet.
所需工具：
水冷槽实验室温度计橡胶手套此蓝图制作
相关蓝图
这些蓝图共享知识——技术、材料或原理
CC0 公共领域
此蓝图以 CC0 协议发布。你可以自由复制、修改、分发和使用此作品，无需征得许可。
通过购买蓝图中的产品支持创客，他们将获得 创客佣金 （由供应商设定），或创建此蓝图的新版本并将其作为连接包含在你自己的蓝图中以分享收入。