Fluctuation effects in the theory of microphase separation in block copolymers

1987 ◽  
Vol 87 (1) ◽  
pp. 697-705 ◽  
Author(s):  
Glenn H. Fredrickson ◽  
Eugene Helfand
Keyword(s):  
Block Copolymers ◽  
Microphase Separation ◽  
Fluctuation Effects

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.

scholarly journals Microphase separation of highly amphiphilic, low N polymers by photoinduced copper-mediated polymerization, achieving sub-2 nm domains at half-pitch

2019 ◽  
Vol 10 (46) ◽  
pp. 6254-6259 ◽  
Author(s):  
Ellis Hancox ◽  
Evelina Liarou ◽  
James S. Town ◽  
Glen R. Jones ◽  
Siân A. Layton ◽  
...  
Keyword(s):  
Phase Separation ◽  
Block Copolymers ◽  
Polyacrylic Acid ◽  
Microphase Separation

Fluoro-polyacrylic acid block copolymers with vary narrow dispersity are shown to have sub-2 nm domain sizes on phase separation.

scholarly journals The crystallinity, thermal properties and microscopic morphology of di-block copolymers of l-lactide and several acrylates

RSC Advances ◽  
2016 ◽  
Vol 6 (38) ◽  
pp. 31934-31946 ◽  
Author(s):  
Wei-Wei Wang ◽  
Long Jiang ◽  
Wu-Yang Ren ◽  
Chun-Mei Zhang ◽  
Chang-Zhen Man ◽  
...  
Keyword(s):  
Thermal Properties ◽  
Block Copolymers ◽  
Microphase Separation ◽  
Microscopic Morphology

Di-block copolymers of l-lactide and (meth)acrylate were synthesized from PLLA macroinitiators, and the microphase separation of copolymers was observed.

scholarly journals Microphase separation at the surface of block copolymers, as studied with atomic force microscopy

2000 ◽  
Vol 19 (4) ◽  
pp. 381-395 ◽  
Author(s):  
A Rasmont ◽  
Ph Leclère ◽  
C Doneux ◽  
G Lambin ◽  
J.D Tong ◽  
...  
Keyword(s):  
Atomic Force Microscopy ◽  
Block Copolymers ◽  
Microphase Separation ◽  
Force Microscopy ◽  
Atomic Force
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