【简答题】用过氧化二苯甲酰作引发剂,苯乙烯在60°C下进行本体聚合,试计算链引发、向引发剂转移、向单体转移三部分在聚合度倒数中所占的百分比。对聚合有何影响? 计算时用下列数据: [I]=0.04mol ·L -1 , f =0.8 ; k d =2.0 ́ 10 -6 s -1 , k p =176 L ·(mols) -1 , k t =3.6 ́ 10 7 L ·(mol·s) -1 , r (60...
【简答题】In today’s Internet age, online s can be a change from the pressure of school and work. However, they can also cause problems and unhealthy addictions. This is most clearly seen in the example of ...