Analysis of grain structure in partially ordered block copolymers by depolarized light scattering and transmission electron microscopy

被引：32
作者：
Chang, MY
Abuzaina, FM
Kim, WG
Gupton, JP
Garetz, BA
Newstein, MC
Balsara, NP
Yang, L
Gido, SP
Cohen, RE
Boontongkong, Y
Bellare, A
机构：
[1] Polytech Univ, Dept Chem & Chem Engn, Brooklyn, NY 11201 USA
[2] Polytech Univ, Dept Elect Engn, Brooklyn, NY 11201 USA
[3] Univ Calif Berkeley, Dept Chem Engn, Berkeley, CA 94720 USA
[4] Univ Massachusetts, Dept Polymer Sci & Engn, Amherst, MA 01003 USA
[5] MIT, Dept Chem Engn, Cambridge, MA 02139 USA
[6] MIT, Dept Mat Sci & Engn, Cambridge, MA 02139 USA
[7] Harvard Univ, Sch Med, Dept Orthoped Surg, Boston, MA 02115 USA
来源：
MACROMOLECULES | 2002年 / 35卷 / 11期
关键词：
D O I：
10.1021/ma0201025
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
The grain structure in lamellar block copolymer samples undergoing a disorder-to-order transition was studied by a combination of depolarized light scattering (DPLS) and transmission electron microscopy (TEM). The 4-fold symmetry of the DPLS profiles indicated the presence of anisotropic grains. A pattern recognition algorithm for analyzing the TEM micrographs of samples partially filled with anisotropic, ordered grains was developed. The volume fractions of sample occupied by ordered grains determined from light scattering and electron microscopy are in reasonable agreement. Both methods indicate that, on average, the characteristic length of the grains in the direction perpendicular to the lamellar planes was a factor of 2 larger than that in the plane of the lamellae. The absolute magnitudes of grain sizes determined by light scattering are about 50% larger than those determined by microscopy.
引用
收藏
页码：4437 / 4447
页数：11
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