Diffusion in strongly segregated block copolymers
Diffusion in strongly segregated block copolymers
复制标题
强分离嵌段共聚物中的扩散
DOI:
10.1021/ma00027a078
复制
发表时间:
1992
期刊:
影响因子:
5.5
通讯作者:
E. Helfand
中科院分区:
文献类型:
--
作者:
E. Helfand
The significant activation free energy will be the larger of eqs 5 and 6. With this result we can see why it was appropriate to use the free space stretching entropy in eq 1. The field acting on a molecule to keep the concentration within a domain uniform6 is only on the order of the domain free energy per molecule, 4 namely, OKxN) 1/3], whereas the stretching entropy of eq 1 is 0 [(xN) 2/3]. We must inquire as to which of the activation free energies, Fs* or Fc4, is smaller, in order to predict the