Light Scattering from Polystyrene-block-poly(ethylene-co-propylene) in Decane and in Dioxane

1993 ◽  
Vol 58 (10) ◽  
pp. 2282-2289 ◽  
Author(s):  
Jaroslav Stejskal ◽  
Čestmír Koňák ◽  
Martin Helmstedt ◽  
Pavel Kratochvíl
Keyword(s):  
Light Scattering ◽  
Diblock Copolymer ◽  
Similar Pattern ◽  
Static Light Scattering ◽  
Selective Solvent ◽  
Poly Ethylene

Polystyrene-block-poly(ethylene-co-propylene) solutions in decane have been investigated by dynamic and static light scattering. The dissolution of the diblock copolymer in a solvent, which is selective of aliphatic blocks, yields well-defined metastable micellar structures. These structures are converted into equilibrium micelles on heating and change into frozen micelles when cooled. A similar pattern is observed also in dioxane, which is a selective solvent for polystyrene blocks.

Aqueous solution properties of oligo- and poly(ethylene oxide) by static light scattering and intrinsic viscosity

Polymer ◽  
1997 ◽  
Vol 38 (12) ◽  
pp. 2885-2891 ◽  
Author(s):  
Seigou Kawaguchi ◽  
Genji Imai ◽  
Junto Suzuki ◽  
Akira Miyahara ◽  
Toshiaki Kitano ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Light Scattering ◽  
Ethylene Oxide ◽  
Intrinsic Viscosity ◽  
Static Light Scattering ◽  
Solution Properties ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene

scholarly journals Structure of PEP–PEO block copolymer micelles: exploiting the complementarity of small-angle X-ray scattering and static light scattering

2011 ◽  
Vol 44 (3) ◽  
pp. 473-482 ◽  
Author(s):  
Grethe Vestergaard Jensen ◽  
Qing Shi ◽  
María J. Hernansanz ◽  
Cristiano L. P. Oliveira ◽  
G. Roshan Deen ◽  
...  
Keyword(s):  
Light Scattering ◽  
Block Copolymer ◽  
Small Angle ◽  
Static Light Scattering ◽  
Length Scales ◽  
X Ray ◽  
X Ray Scattering ◽  
Block Copolymer Micelles ◽  
Copolymer Micelles ◽  
Poly Ethylene

The structure of large block copolymer micelles is traditionally determined by small-angle neutron scattering (SANS), covering a large range of scattering vectors and employing contrast variation to determine the overall micelle morphology as well as the internal structure on shorter length scales. The present work shows that the same information can be obtained by combining static light scattering (SLS) and small-angle X-ray scattering (SAXS), which provide information on, respectively, large and short length scales. Micelles of a series of block copolymers of poly(ethylene propylene)-b-poly(ethylene oxide) (PEP–PEO) in a 70% ethanol solution are investigated. The polymers have identical PEP blocks of 5.0 kDa and varying PEO blocks of 2.8–49 kDa. The SLS contrasts of PEP and PEO are similar, providing a homogeneous contrast, making SLS ideal for determining the overall micelle morphology. The SAXS contrasts of the two components are very different, allowing for resolution of the internal micelle structure. A core–shell model with a PEP core and PEO corona is fitted simultaneously to the SAXS and SLS data using the different contrasts of the two blocks for each technique. With increasing PEO molecular weight, a transition from cylindrical to spherical micelles is observed. This transition cannot be identified from the SAXS data alone, but only from the SLS data.

Static light scattering from poly(ethylene oxide) in methanol

1996 ◽  
Vol 34 (3) ◽  
pp. 583-586 ◽  
Author(s):  
Shinichi Kinugasa ◽  
Hisae Nakahara ◽  
Jun-Ichi Kawahara ◽  
Yoshinori Koga ◽  
Haruo Takaya
Keyword(s):  
Light Scattering ◽  
Ethylene Oxide ◽  
Static Light Scattering ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene
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