MOLECULAR-WEIGHT DEPENDENCE OF THE LAMELLAR DOMAIN SPACING OF ABC TRIBLOCK COPOLYMERS AND THEIR CHAIN CONFORMATIONS IN LAMELLAR DOMAINS

被引：66

作者：

MOGI, Y

MORI, K

KOTSUJI, H

MATSUSHITA, Y

NODA, I

HAN, CC

机构：

[1] NAGOYA UNIV,DEPT APPL CHEM,FURO CHO,CHIKUSA KU,NAGOYA 46401,JAPAN

[2] NATL INST STAND & TECHNOL,DIV POLYMERS,GAITHERSBURG,MD 20899

来源：

MACROMOLECULES | 1993年 / 26卷 / 19期

关键词：

Molecular weight - Physical properties - Polyisoprenes - Polystyrenes - Vinyl resins;

D O I：

10.1021/ma00071a029

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 molecular weight dependence of the lamellar domain spacing of isopren-styrene-2-vinylpyridine triblock copolymers in bulk was studied over the molecular weight range from 40K to 280K by using a small-angle X-ray scattering (SAXS) method. It was found that the lamellar domain spacings of the triblock copolymers are larger than those of styrene-2-vinylpyridine diblock copolymers with the same molecular volumes. This result can be interpreted by theories of microphase separation at the strong segregation limit, taking into account the fact that the number of boundaries in the repeating structure of triblock copolymers is twice as large as that of diblock copolymers. Moreover, small-angle neutron scattering (SANS) studies imply that the middle block chain of triblock copolymers is contracted along the direction parallel to lamellae in almost the same manner as the block chain of the diblock copolymers.

引用

页码：5169 / 5173

页数：5

共 10 条

[1] MOLECULAR-WEIGHT DEPENDENCE OF LAMELLAR STRUCTURE IN STYRENE ISOPRENE 2-BLOCK AND 3-BLOCK COPOLYMERS [J].