The effect of chain architecture on the phase behavior of A4B4 miktoarm block copolymers

2019 ◽  
Vol 10 (23) ◽  
pp. 3079-3087 ◽  
Author(s):  
Ki Hyun Kim ◽  
Jihoon Park ◽  
Youngson Choe ◽  
June Huh ◽  
Joona Bang
Keyword(s):  
Block Copolymers ◽  
Phase Behavior ◽  
Polylactic Acid ◽  
Phase Segregation ◽  
Chain Architecture ◽  
Phase Behaviors

Well-defined miktoarm (polystyrene)4-(polylactic acid)4 ((PS)4-(PLA)4) block copolymers were synthesized and their phase behaviors were compared with linear PS-b-PLA block copolymers, in which the miktoarm architecture enhanced the phase segregation.

Confined Sphere-Forming Block Copolymers: Phase Behavior and the Role of Chain Architecture

2009 ◽  
Vol 42 (21) ◽  
pp. 8500-8512 ◽  
Author(s):  
G. J. A. Sevink ◽  
A. V. Zvelindovsky
Keyword(s):  
Block Copolymers ◽  
Phase Behavior ◽  
Chain Architecture

scholarly journals Molecular Weight-Dependent, Flexible Phase Behaviors of Amphiphilic Block Copolymer/Additive Complexes in Aqueous Solution

Polymers ◽  
2021 ◽  
Vol 13 (2) ◽  
pp. 178
Author(s):  
Jong Dae Jang ◽  
Young-Jin Yoon ◽  
Sang-Woo Jeon ◽  
Young Soo Han ◽  
Tae-Hwan Kim
Keyword(s):  
Aqueous Solution ◽  
Molecular Weight ◽  
Block Copolymer ◽  
Block Copolymers ◽  
Phase Behavior ◽  
Optical Sensors ◽  
Face Centered Cubic ◽  
Wide Range ◽  
Pluronic Block Copolymer ◽  
Phase Behaviors

Pluronic amphiphilic block copolymers, well known to have a phase behavior can be controlled by external conditions, have a wide range of potential for applications such as nanotemplates or nanobuilding blocks. However, the phase behaviors of Pluronic block copolymer/additive complexes with highly ordered phases have not been fully investigated. Here, we report the unusual molecular weight-dependent self-assembly of Pluronic block copolymer/additive complexes. Depending on the temperature and additive, Pluronic P65 block copolymer with a lower molecular weight showed the closed loop-like (CLL) phase behavior with the disorder-order-disorder-order phase transition in aqueous solution, whereas Pluronic P105 and P85 block copolymers with higher molecular weights underwent highly ordered continuous phase transitions with face centered cubic (FCC), hexagonal, and lamellar phases. It is expected that the specific phase behavior of the block copolymer/additive complex can be applied in optical devices such as nanotemplates or optical sensors for a highly ordered superlattice. Furthermore, this study provides a new route to control the phase behavior of the block copolymers without a complicated process.

Phase behavior of low-functionality, telechelic star block copolymers

2010 ◽  
Vol 144 ◽  
pp. 143-157 ◽  
Author(s):  
Federica Lo Verso ◽  
Athanassios Z. Panagiotopoulos ◽  
Christos N. Likos
Keyword(s):  
Block Copolymers ◽  
Phase Behavior ◽  
Star Block Copolymers

Phase Behavior in Aqueous Two-Phase Systems Containing Micelle-Forming Block Copolymers

1995 ◽  
Vol 28 (10) ◽  
pp. 3597-3603 ◽  
Author(s):  
Maarten Svensson ◽  
Per Linse ◽  
Folke Tjerneld
Keyword(s):  
Block Copolymers ◽  
Phase Behavior ◽  
Two Phase ◽  
Aqueous Two Phase Systems ◽  
Phase Systems

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.

Phase behavior of ABC-type triple-hydrophilic block copolymers in aqueous solutions

2016 ◽  
Vol 39 (7) ◽  
Author(s):  
Lingfei Zheng ◽  
Jianqi Wu ◽  
Zheng Wang ◽  
Yuhua Yin ◽  
Run Jiang ◽  
...  
Keyword(s):  
Block Copolymers ◽  
Aqueous Solutions ◽  
Phase Behavior

Closed-Loop Phase Behavior of Block Copolymers in the Presence of Competitive Hydrogen-Bonding and Coulombic Interaction

2018 ◽  
Vol 51 (12) ◽  
pp. 4727-4734 ◽  
Author(s):  
Rui-Yang Wang ◽  
Jie Huang ◽  
Xiao-Shuai Guo ◽  
Xiao-Han Cao ◽  
Shu-Fen Zou ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Block Copolymers ◽  
Phase Behavior ◽  
Closed Loop ◽  
Coulombic Interaction

Basic Understanding of Phase Behavior and Structure of Silicone Block Copolymers and Surfactant–Block Copolymer Mixtures

2008 ◽  
pp. 391-417 ◽  
Author(s):  
Carlos Rodrguez ◽  
Arturo Lpez-Quintela ◽  
Md. Hemayet Uddin ◽  
Kenji Aramaki ◽  
Hironobu Kunieda
Keyword(s):  
Block Copolymer ◽  
Block Copolymers ◽  
Phase Behavior ◽  
Basic Understanding

Phase Behavior, Wettability Alteration, and Oil Recovery of Low-Salinity Surfactant Solutions in Carbonate Reservoirs

SPE Journal ◽  
2020 ◽  
Vol 25 (04) ◽  
pp. 1784-1802 ◽  
Author(s):  
Sepideh Veiskarami ◽  
Arezou Jafari ◽  
Aboozar Soleymanzadeh
Keyword(s):  
Phase Behavior ◽  
Oil Recovery ◽  
Wettability Alteration ◽  
Study Phase ◽  
Low Salinity ◽  
Angle Measurements ◽  
Contact Angle Measurements ◽  
Favorable State ◽  
Phase Behaviors ◽  
The Impact

Summary Recent investigations have shown that treatment with injected brine composition can improve oil production. Various mechanisms have been suggested to go through the phenomenon; nevertheless, wettability alteration is one of the most commonly proposed mechanisms in the literature. Wettability alteration of the porous media toward a more favorable state reduces the capillary pressure, consequently contributing to the oil detachment from pore walls. In this study, phase behavior, oil recovery, and wettability alteration toward a more favorable state were investigated using a combination of formulations of surfactant and modified low-salinity (LS) brine. Phase behaviors of these various formulations were examined experimentally through observations on relative phase volumes. Experiments were performed in various water/oil ratios (WORs) in the presence of two different oil samples, namely C1 and C2. These experiments were conducted to clarify the impact of each affecting parameter; in particular, the impact of resin and asphaltene of crude oil on the performance of LS surfactant (LSS) flooding. Hereafter, the optimal formulation was flooded into the oil-wet micromodel. Optimum formulations increased the capillary number more than four orders of magnitude higher than that under formation brine (FB) flooding, thus causing oil recovery rates of 61 and 67% for oil samples C1 and C2, respectively. Likewise, the wettability alteration potential of optimized formulations was studied through contact angle measurements. Results showed that LS and LSS solutions could act as possible wettability alternating methods for oil-wet carbonate rocks. Using the optimum formulation resulted in a wettability alteration index (WAI) of 0.66 for sample C1 and 0.49 for sample C2, while using LS brine itself ended in 0.51 and 0.29 for oil samples C1 and C2, respectively.

Sign in / Sign up

Export Citation Format

Share Document