英语翻译Experiment 1:Polymerization of acrylamide in waterAim:(a

英语翻译
Experiment 1:Polymerization of acrylamide in water
Aim:(a) To polymerize acrylamide (monomer) in water to polyacrylamide (polymer) by free radical polymerization using a "redox" pair of initiators.
(b) To follow the kinetics of polymerization by monitoring the variation of temperature and viscosity (measured by using Stokes Law for falling spheres) with time.
Materials and Apparatus:
Solution I (Stock acrylamide solution):30 wt/vol % acrylamide in water Solution II (Dilution solution):0.05 M NaNO3 + 0.02 % NaN3 in Milli Q water or equivalent.Redox initiator AMPS (ammonium persulphate),granular solid,MW 232 g/mol Redox initiator TEMED (tetramethylethylene diamine),liquid,density 1g/ml,MW 116 g/mol Thermocouple set and read-out 250 ml Erlenmeyer flasks Screw cap plastic test tubes 5 " long) Glass beads (3 mm) Glass "wool" insulation Parafilm Stop watch Electric balance Helium or nitrogen tank with reducing valve (multiple outlets) Sparge tips
Brief Background:
Free radical chain polymerization:(see handout from Rempp & Merrill,Polymer Synthesis,pp65-78)
Chain polymerization is the process by which a polymer chain grows by addition of monomers – single units – only; growth does not occur by addition of oligomers –multiunit segments.Free radical polymerization is one type of chain polymerization.Cationic and anionic polymerizations are other kinds of chain polymerization.
Free radical polymerization produces "linear" strings of monomer units by a chain reaction started by free radical initiators.Reaction I below shows the key reaction of propogation,that a chain initiated by a radical R already having n vinyl units (i) adds another
monomer (ii) to its active radical end,thereby making the added monomer the new active
end.

实验1：聚合丙烯酰胺水
目的：（一）为聚合丙烯酰胺（单体）的水聚丙烯酰胺（聚合物）的自由基使用“还原”的发起者对聚合.
（二）遵循监测温度和粘度变化的聚合反应动力学（测量用落球斯托克斯法）的时间.
材料和设备：
解决方案我（股票丙烯酰胺溶液）：30野生/水溶液第二卷％丙烯酰胺（稀释液）：0.05米硝酸钠+ 0.02 62.500 Q水或同等％叠氮化钠.氧化还原引发安培（过硫酸铵）,粒状固体,分子量232克/氧化还原引发四甲基-1（四甲基乙烯二胺）,液体,密度1g/ml,分子量116克/摩尔热电偶设置和读出250毫升锥形瓶螺帽塑料测试管（〜5“长期）玻璃珠（3毫米）玻璃”羊毛“绝缘封口膜电码表氦和氮平衡罐的减压阀（多点）酹秘诀
背景简介：
自由基链聚合：（看到Rempp和美林,高分子合成,病毒pp65 - 78讲义）
连锁聚合反应的过程,是一种聚合物链的增长除了由单体 - - 单单位仅增长不会发生的另外低聚物,多单位部门.自由基聚合是一种连锁聚合反应的类型.阳离子和阴离子聚合反应是其他类型的聚合链.
产生自由基聚合“的连锁反应,单体单元直线”字符串由自由基引发剂开始.下文的反应显示了繁殖的关键反应,一个由激进的连锁店已经有n乙烯单位（一）规例开始又增加了
单体（二）积极激进的结束,从而使增加的新的积极的单体
末端.