Ordered Structure in Blends of Block Copolymers. 5. Blends of Lamella-Forming Block Copolymers Showing both Microphase Separation Involving Unique Morphological Transitions and Macrophase Separation†

2000 ◽  
Vol 33 (22) ◽  
pp. 8258-8268 ◽  
Author(s):  
Daisuke Yamaguchi ◽  
Shuntaro Shiratake ◽  
Takeji Hashimoto
Keyword(s):  
Block Copolymers ◽  
Microphase Separation ◽  
Ordered Structure ◽  
Morphological Transitions ◽  
Macrophase Separation

Ordered Structures of Styrene Butadiene Block Copolymers

1967 ◽  
Vol 40 (5) ◽  
pp. 1526-1528
Author(s):  
Ed Vanzo
Keyword(s):  
Solid State ◽  
Block Copolymers ◽  
Mechanical Deformation ◽  
Solution Properties ◽  
Two Dimensional ◽  
Ordered Structure ◽  
Ordered Structures ◽  
Polymer Molecules ◽  
Cast Films ◽  
Styrene Butadiene

Abstract Anionically prepared block copolymers of butadiene and styrene exhibit solution properties which result from a two dimensional ordering of the polymer molecules. The most notable of these properties is the iridescent colors of toluene solutions which are dependent on concentration and abruptly change on mechanical deformation. Electron micrographs of the surface of cast films indicate that the ordered structure is retained to some degree in the solid state.

Effect of Block Molecular Weight on the Mechanical Properties of PA1010-b-PEG Segmented Block Copolymers

2012 ◽  
Vol 512-515 ◽  
pp. 2127-2130
Author(s):  
Li Huo ◽  
Cai Xia Dong
Keyword(s):  
Mechanical Properties ◽  
Molecular Weight ◽  
Block Copolymers ◽  
Microphase Separation ◽  
Soft Segment ◽  
Mechanical Measurements ◽  
Wide Range ◽  
Hard Block ◽  
Higher Temperature ◽  
Hard Segments

The mechanical properties were investigated of a series of PA-PEG thermalplastic elastomer based on PA1010 and polytetramethylene glycol (PEG) with varying hard and soft segment content. Dynamic mechanical measurements of these polymers have carried out over a wide range of temperatures. The block copolymers exhibit three peaks, designated as α, β and γ in the tanδ-temperature curve. The α transition shifts to higher temperature with increasing hard block molecular weight. However, at a constant hard molecular weight, the α transition shifts to higher temperature and the damping increases on increasing the soft segment molecular weight. DMA results show that the block copolymers exhibit a microphase separation structure and both soft and hard segments were found to be crystallizable. The degree of phase separation increases with increasing hard block molecular weight.

Phase behaviors of side chain liquid crystalline block copolymers

RSC Advances ◽  
2015 ◽  
Vol 5 (2) ◽  
pp. 1514-1521 ◽  
Author(s):  
Xiaokang Li ◽  
Feng Huang ◽  
Tao Jiang ◽  
Xiaohua He ◽  
Shaoliang Lin ◽  
...  
Keyword(s):  
Block Copolymers ◽  
Liquid Crystalline ◽  
Microphase Separation ◽  
Dissipative Particle Dynamics ◽  
Particle Dynamics ◽  
Side Chain ◽  
Phase Behaviors

The microphase separation of side chain liquid crystalline (SCLC) block copolymers was studied using dissipative particle dynamics (DPD) simulations.

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