Orthorhombic Fddd Network in Diblock Copolymer Melts
Orthorhombic Fddd Network in Diblock Copolymer Melts
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DOI：
10.1021/ma070739u
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发表时间：
2006-05
期刊：
影响因子：
5.5
通讯作者：
M. Takenaka;Tsutomu Wakada;S. Akasaka;S. Nishitsuji;K. Saijo;H. Shimizu;H. Hasegawa
中科院分区：
文献类型：
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作者：
M. Takenaka;Tsutomu Wakada;S. Akasaka;S. Nishitsuji;K. Saijo;H. Shimizu;H. Hasegawa
用小角X射线散射和透射电子显微镜首次在聚（苯乙烯-b-异戊二烯）（S-I）二嵌段共聚物熔体中发现了Fddd网络结构，正如泰勒等人用二嵌段共聚物熔体的自洽场理论计算所预言的那样。S-I的相图显示出随温度降低的无序-Fddd-拉曼序列。测得的晶胞参数比（a，B，c）为1：2.02：3.46，与理论计算结果一致。
For the first time a Fddd network structure is found in a poly(styrene-b-isoprene) (S-I) diblock copolymer melts by using small-angle X-ray scattering and transmission electron microscope, as predicted by Tyler et al. by using calculations with self-consistent field theory for diblock copolymer melts. The phase diagram of the S-I exhibits the sequence of Disorder- Fddd-Lamellae with decreasing temperature. The measured unit cell parameters ratios (a,b,c) are (1:2.02:3.46), which agrees with the result of the theoretical calculation.