Small-angle x-ray and neutron scattering from bulk and oriented triblock copolymer gels

N. Mischenko; K. Reynders; M.H.J. Koch; K. Mortensen; J.S. Pedersen; F. Fontaine; R. Graulus; H. Reynaers

doi:10.1021/ma00110a045

Small-angle x-ray and neutron scattering from bulk and oriented triblock copolymer gels

N. Mischenko, K. Reynders, M.H.J. Koch, K. Mortensen, J.S. Pedersen, F. Fontaine, R. Graulus, H. Reynaers

KU Leuven

Research output: Contribution to journal › Journal article › Research › peer-review

Abstract

Gels of polystyrene-block-rubber-block-polystyrene were investigated by small-angle X-ray (SAXS) and neutron (SANS) scattering. The rubber midblock was either poly(ethylene/propylene) (PS-PEP-PS) or poly(ethylene/butylene) (PS-PEB-PS). The gels of these thermoplasts have similar superstructures consisting of domains of associated polystyrene (PS) blocks, connected by the midblocks which are dissolved in an extender oil. The microphase separation is more pronounced in the PS-PEP-PS gels and results in clear interdomain scattering maxima and form factor oscillations. The ordering of the PS domains is a function of block copolymer concentration, molar mass, end block/midblock ratio, deformation, and temperature. Deformations up to 150% extension are reversible at room temperature. The scattering patterns of the unstretched samples were fitted with two different models: a hard-sphere liquid model and a model of a disordered solid with local coordination.

Original language	English
Journal	Macromolecules
Volume	28
Issue number	6
Pages (from-to)	2054-2062
ISSN	0024-9297
DOIs	https://doi.org/10.1021/ma00110a045
Publication status	Published - 1995

Access to Document

10.1021/ma00110a045

OpenUrl availability

Full text

Cite this

@article{cd0d6d76c0d948dfa1261983e24a3fcf,

title = "Small-angle x-ray and neutron scattering from bulk and oriented triblock copolymer gels",

abstract = "Gels of polystyrene-block-rubber-block-polystyrene were investigated by small-angle X-ray (SAXS) and neutron (SANS) scattering. The rubber midblock was either poly(ethylene/propylene) (PS-PEP-PS) or poly(ethylene/butylene) (PS-PEB-PS). The gels of these thermoplasts have similar superstructures consisting of domains of associated polystyrene (PS) blocks, connected by the midblocks which are dissolved in an extender oil. The microphase separation is more pronounced in the PS-PEP-PS gels and results in clear interdomain scattering maxima and form factor oscillations. The ordering of the PS domains is a function of block copolymer concentration, molar mass, end block/midblock ratio, deformation, and temperature. Deformations up to 150% extension are reversible at room temperature. The scattering patterns of the unstretched samples were fitted with two different models: a hard-sphere liquid model and a model of a disordered solid with local coordination.",

keywords = "Materialer med s{\ae}rlige fysiske og kemiske egenskaber",

author = "N. Mischenko and K. Reynders and M.H.J. Koch and K. Mortensen and J.S. Pedersen and F. Fontaine and R. Graulus and H. Reynaers",

year = "1995",

doi = "10.1021/ma00110a045",

language = "English",

volume = "28",

pages = "2054--2062",

journal = "Macromolecules",

issn = "0024-9297",

publisher = "American Chemical Society",

number = "6",

}

TY - JOUR

T1 - Small-angle x-ray and neutron scattering from bulk and oriented triblock copolymer gels

AU - Mischenko, N.

AU - Reynders, K.

AU - Koch, M.H.J.

AU - Mortensen, K.

AU - Pedersen, J.S.

AU - Fontaine, F.

AU - Graulus, R.

AU - Reynaers, H.

PY - 1995

Y1 - 1995

N2 - Gels of polystyrene-block-rubber-block-polystyrene were investigated by small-angle X-ray (SAXS) and neutron (SANS) scattering. The rubber midblock was either poly(ethylene/propylene) (PS-PEP-PS) or poly(ethylene/butylene) (PS-PEB-PS). The gels of these thermoplasts have similar superstructures consisting of domains of associated polystyrene (PS) blocks, connected by the midblocks which are dissolved in an extender oil. The microphase separation is more pronounced in the PS-PEP-PS gels and results in clear interdomain scattering maxima and form factor oscillations. The ordering of the PS domains is a function of block copolymer concentration, molar mass, end block/midblock ratio, deformation, and temperature. Deformations up to 150% extension are reversible at room temperature. The scattering patterns of the unstretched samples were fitted with two different models: a hard-sphere liquid model and a model of a disordered solid with local coordination.

AB - Gels of polystyrene-block-rubber-block-polystyrene were investigated by small-angle X-ray (SAXS) and neutron (SANS) scattering. The rubber midblock was either poly(ethylene/propylene) (PS-PEP-PS) or poly(ethylene/butylene) (PS-PEB-PS). The gels of these thermoplasts have similar superstructures consisting of domains of associated polystyrene (PS) blocks, connected by the midblocks which are dissolved in an extender oil. The microphase separation is more pronounced in the PS-PEP-PS gels and results in clear interdomain scattering maxima and form factor oscillations. The ordering of the PS domains is a function of block copolymer concentration, molar mass, end block/midblock ratio, deformation, and temperature. Deformations up to 150% extension are reversible at room temperature. The scattering patterns of the unstretched samples were fitted with two different models: a hard-sphere liquid model and a model of a disordered solid with local coordination.

KW - Materialer med særlige fysiske og kemiske egenskaber

U2 - 10.1021/ma00110a045

DO - 10.1021/ma00110a045

M3 - Journal article

SN - 0024-9297

VL - 28

SP - 2054

EP - 2062

JO - Macromolecules

JF - Macromolecules

IS - 6

ER -

Small-angle x-ray and neutron scattering from bulk and oriented triblock copolymer gels

Abstract

Access to Document

OpenUrl availability

Fingerprint

Cite this