Microphase-separation behavior of triblock copolymer melts, comparison with diblock copolymer melts

被引：86

作者：

Mai, SM ^{[1
]}

Mingvanish, W

Turner, SC

Chaibundit, C

Fairclough, JPA

Heatley, F

Matsen, MW

Ryan, AJ

Booth, C

机构：

[1] Univ Manchester, Manchester Polymer Ctr, Manchester M13 9PL, Lancs, England

[2] Univ Manchester, Dept Chem, Manchester M13 9PL, Lancs, England

[3] Univ Sheffield, Dept Chem, Sheffield S3 7HF, S Yorkshire, England

[4] Univ Reading, Ctr Polymer Sci, Reading RG6 6AF, Berks, England

来源：

MACROMOLECULES | 2000年 / 33卷 / 14期

关键词：

D O I：

10.1021/ma000154z

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Nineteen oxybutylene/oxyethylene/oxybutylene triblock copolymers [Bn/2EmBn/2, E = oxyethylene, OCH2CH2; B = oxybutylene, OCH2CH(CH2CH3)] were prepared and characterized. Twelve of the copolymers microphase-separated in the melt. Investigation of this microphase-separation behavior using small-angle X-ray scattering (SAXS) yielded values of the domain spacing (d-spacings) in the ordered phases and of the temperature of the order-disorder transition (T-ODT). In several cases the ordered phase structure was deduced from a combination of 1D and 2D SAXS and rheology. Values of TODT for the triblock copolymers were ca. 100 degrees lower than those for EmBn diblock copolymers of identical composition and chain length but 30 degrees C higher if compared with diblock copolymers of half the triblock length. Values of the d-spacings indicated that the triblock copolymers were 10% more stretched than corresponding diblock copolymers. Determination of the Flory-Huggins parameter (chi) for the diblock and triblock systems gave identical results. The experimental results are compared with the prediction of mean-field theory.

引用

页码：5124 / 5130

页数：7

共 35 条

[1] RHEOLOGY AND THE MICROPHASE SEPARATION TRANSITION IN STYRENE-ISOPRENE BLOCK-COPOLYMERS [J].

ADAMS, JL ;

GRAESSLEY, WW ;

MACROMOLECULES, 1994, 27 (21) :6026-6032

[2] Tricontinuous double gyroid cubic phase in triblock copolymers of the ABA type [J].

Avgeropoulos, A ;

Dair, BJ ;

Hadjichristidis, N ;

Thomas, EL .

MACROMOLECULES, 1997, 30 (19) :5634-5642

[3] FLUCTUATION-INDUCED 1ST-ORDER TRANSITION OF AN ISOTROPIC SYSTEM TO A PERIODIC STATE [J].

BATES, FS ;

ROSEDALE, JH ;

FREDRICKSON, GH ;

GLINKA, CJ .

PHYSICAL REVIEW LETTERS, 1988, 61 (19) :2229-2232

[4] THE COMBINATION OF THERMAL-ANALYSIS AND TIME-RESOLVED X-RAY TECHNIQUES - A POWERFUL METHOD FOR MATERIALS CHARACTERIZATION [J].

BRAS, W ;

DERBYSHIRE, GE ;

DEVINE, A ;

CLARK, SM ;

COOKE, J ;

KOMANSCHEK, BE ;

RYAN, AJ .

JOURNAL OF APPLIED CRYSTALLOGRAPHY, 1995, 28 :26-32

[5]

Fairclough JPA, 1999, PHYS CHEM CHEM PHYS, V1, P2093

[6] FLUCTUATION EFFECTS IN THE THEORY OF MICROPHASE SEPARATION IN BLOCK COPOLYMERS [J].

FREDRICKSON, GH ;

HELFAND, E .

JOURNAL OF CHEMICAL PHYSICS, 1987, 87 (01) :697-705

[7] ORDER-DISORDER TRANSITION - DIBLOCK VERSUS TRIBLOCK COPOLYMERS [J].

GEHLSEN, MD ;

ALMDAL, K ;

BATES, FS .

MACROMOLECULES, 1992, 25 (02) :939-943

[8] On the Landau-Brazovskii theory for block copolymer melts [J].

Hamley, IW ;

Podneks, VE .

MACROMOLECULES, 1997, 30 (12) :3701-3703

[9]

HAMLEY IW, 1998, PHYSICS BLOCK COPOLY

[10] BLOCK COPOLYMER THEORY .4. NARROW INTERPHASE APPROXIMATION [J].

HELFAND, E ;

WASSERMAN, ZR .

MACROMOLECULES, 1976, 9 (06) :879-888

← 1 2 3 4 →