英语翻译EthyleneThe other chemicalreactant is a catalyst．In chai

英语翻译
Ethylene
The other chemicalreactant is a catalyst．In chain—reaction polymerization,the catalyst can be a free-radical peroxide added in relatively low concentrations． A free-radical is achemical component that contains a free electron that forms a covalent bondwith an electron on another molecule．The formation of afree radical from an organic peroxide is shown below．
With (·)representing the free electron
In this chemical reaction,two freeradicals have been formed from the one molecule of R2 02．Now that a11 the chemical components have been identified,we can begin to look at the polymerization process．
Step 1：Initiation
The first step in thechain-reaction polymerization process,initiation,Occurswhen the free-radical catalyst reacts with a double-bonded carbon monomer,beginning the polymer chain．The doublecarbon bond breaks apart,the monomer bonds to the freeradical,and the free electron is transferred to theoutside carbon atom in this reaction．④
Step 2：Propagation
The next step in theprocess,propagation,is a repetitive operation inwhich the physical chain of the polymer is formed．Thedouble bond of successive monomers is opened up when the monomer is reacted to thereactive polymer chain The free electron is successively passed down the lineof the chain to the outside carbon atom．
This reaction is able to occur continuously because the energyin the chemical system is lowered as the chain grows．Thermodynamicallyspeaking,the sum of the energies of the polymer is lessthan the sum of the energies of the individual monomers．Simply put,the single bonds in the polymericchain are more stable than the double bonds of the monomer．
Step 3：Termination
Termination Occurs splittingof the organic when another free radical(R一0‘),left over from the original peroxide,meetsthe end of the growing chain．④This free-radical terminatesthe chain by linking with the last CH；component of thepolymer chain．This

乙烯
　　
　　其他chemicalreactant聚合catalyst.In的连锁反应,催化剂可以添加过氧化自由基浓度相对较低.自由基是achemical组件包含一个自由电子,形成共价bondwith电子在另一个molecule.The自由彻底从一个有机过氧化物的形成如下所示.
　　
　　(·)代表了自由电子
　　
　　在这个化学反应,两个自由基形成了一个分子的R2 02.现在a11化学成分已经确定了,我们可以开始看看聚合过程.
　　
　　步骤1:初始化
　　
　　连锁反应的第一步聚合过程,启动,胜过自由基催化剂与双键碳反应单体,聚合物开始chain.The doublecarbon债券分裂,游离基的单体债券,自由电子在这个反应碳原子转移到外部.④
　　
　　步骤2:传播
　　
　　传播过程的下一步,是重复操作的物理链中连续单体的聚合物formed.Thedouble债券是开放当单体反应thereactive高分子链自由电子是沿着lineof先后通过外链的碳原子.
　　这种反应能够发生不断,因为energyin化学系统是降低链grows.Thermodynamicallyspeaking,聚合物的能量的总和是低能量的总和个人monomers.Simply说,在polymericchain单一债券比双债券更稳定的单体.
　　
　　步骤3:终止
　　
　　终止发生splittingof有机当另一个自由基(右一0 ')、过氧化遗留下来的原始meetsthe增长链.④这个链接最后CH自由基terminatesthe链;组成部分thepolymer chain.This