Miscibility, Microstructure, and Dynamics of Blends Containing Block Copolymer. 3. Molecular Motion in Homopolystyrene and Polystyrene/Four-Arm Styrene-Butadiene Star Block Copolymer Blends

1994 ◽  
Vol 27 (26) ◽  
pp. 7840-7842 ◽  
Author(s):  
Hanqiao Feng ◽  
Zhiliu Feng ◽  
Liangfang Shen
Keyword(s):  
Block Copolymer ◽  
Molecular Motion ◽  
Copolymer Blends ◽  
Star Block Copolymer ◽  
Styrene Butadiene

scholarly journals Micromechanical Studies of Styrene/Butadiene Block Copolymer Blends

2003 ◽  
Vol 23 (3) ◽  
Author(s):  
R. Adhikari ◽  
G.H. Michler ◽  
M.E. Cagiao ◽  
F.J. Baltá-Calleja
Keyword(s):  
Block Copolymer ◽  
Copolymer Blends ◽  
Styrene Butadiene

Crack toughness behavior of binary poly(styrene-butadiene) block copolymer blends

2004 ◽  
Vol 39 (4) ◽  
pp. 1283-1295 ◽  
Author(s):  
R. Lach ◽  
R. Adhikari ◽  
R. Weidisch ◽  
T. A. Huy ◽  
G. H. Michler ◽  
...  
Keyword(s):  
Block Copolymer ◽  
Copolymer Blends ◽  
Styrene Butadiene

scholarly journals Influence of Controlled Epoxidation of an Asymmetric Styrene/Butadiene Star Block Copolymer on Structural and Mechanical Properties

Polymers ◽  
2020 ◽  
Vol 13 (1) ◽  
pp. 96
Author(s):  
Shankar P. Khatiwada ◽  
Ulrike Staudinger ◽  
Dieter Jehnichen ◽  
Gert Heinrich ◽  
Rameshwar Adhikari
Keyword(s):  
Mechanical Properties ◽  
Block Copolymer ◽  
Chemical Modification ◽  
Tensile Modulus ◽  
Elongation At Break ◽  
Cylindrical Structures ◽  
Star Block Copolymer ◽  
Higher Temperature ◽  
Styrene Butadiene ◽  
Clear Increase

The chemical modification (namely the epoxidation) of a star shaped block copolymer (BCP) based on polystyrene (PS) and polybutadiene (PB) and its effect on structural and mechanical properties of the polymer were investigated. Epoxidation degrees of 37 mol%, 58 mol%, and 82 mol% were achieved by the reaction of the copolymer with meta-chloroperoxy benzoic acid (m-CPBA) under controlled conditions. The BCP structure was found to change from lamellae-like to mixed-type morphologies for intermediate epoxidation level while leading to quite ordered cylindrical structures for the higher level of chemical modification. As a consequence, the glass transition temperature (Tg) of the soft PB component of the BCP shifted towards significantly higher temperature. A clear increase in tensile modulus and tensile strength with a moderate decrease in elongation at break was observed. The epoxidized BCPs are suitable as reactive templates for the fabrication of nanostructured thermosetting resins.

Epoxidation of Styrene/Butadiene Star Block Copolymer by Different Methods and Characterization of the Blends with Epoxy Resin

2014 ◽  
Vol 341 (1) ◽  
pp. 67-74 ◽  
Author(s):  
Rajesh Pandit ◽  
Goerg H. Michler ◽  
Ralf Lach ◽  
Wolfgang Grellmann ◽  
Jean Marc Saiter ◽  
...  
Keyword(s):  
Block Copolymer ◽  
Epoxy Resin ◽  
Star Block Copolymer ◽  
Styrene Butadiene
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