Microphase Separation through Competitive Hydrogen Bonding in Double Crystalline Diblock Copolymer/Homopolymer Blends

2010 ◽  
Vol 43 (18) ◽  
pp. 7695-7704 ◽  
Author(s):  
Nisa V. Salim ◽  
Tracey Hanley ◽  
Qipeng Guo
Keyword(s):  
Hydrogen Bonding ◽  
Diblock Copolymer ◽  
Microphase Separation ◽  
Homopolymer Blends

scholarly journals Hydrogen bonding strength effect on self-assembly supramolecular structures of diblock copolymer/homopolymer blends

2016 ◽  
Vol 7 (13) ◽  
pp. 2395-2409 ◽  
Author(s):  
Shih-Chi Tsai ◽  
Yung-Chih Lin ◽  
En-Li Lin ◽  
Yeo-Wan Chiang ◽  
Shiao-Wei Kuo
Keyword(s):  
Hydrogen Bonding ◽  
Diblock Copolymer ◽  
Steric Hindrance ◽  
Self Assembly ◽  
Bonding Strength ◽  
Supramolecular Structures ◽  
Homopolymer Blends ◽  
Hydrogen Bonding Strength ◽  
Strength Effect

The steric hindrance effect on the hydrogen bonding strength and self-assembly supramolecular structures of the PS-b-PVPh diblock copolymer when blended with P4VP and P2VP homopolymers was investigated.

scholarly journals Modeling Hydrogen Bonding in Diblock Copolymer/Homopolymer Blends

2013 ◽  
Vol 46 (14) ◽  
pp. 5796-5805 ◽  
Author(s):  
Ashkan Dehghan ◽  
An-Chang Shi
Keyword(s):  
Hydrogen Bonding ◽  
Diblock Copolymer ◽  
Homopolymer Blends

scholarly journals Quadruple Hydrogen Bond-Containing A-AB-A Triblock Copolymers: Probing the Influence of Hydrogen Bonding in the Central Block

Molecules ◽  
2021 ◽  
Vol 26 (15) ◽  
pp. 4705
Author(s):  
Boer Liu ◽  
Xi Chen ◽  
Glenn A. Spiering ◽  
Robert B. Moore ◽  
Timothy E. Long
Keyword(s):  
Hydrogen Bonding ◽  
Self Assembly ◽  
Microphase Separation ◽  
Triblock Copolymers ◽  
Random Copolymer ◽  
Thermomechanical Properties ◽  
Structure Property ◽  
Scanning Calorimetry ◽  
Central Block ◽  
Quadruple Hydrogen Bonding

This work reveals the influence of pendant hydrogen bonding strength and distribution on self-assembly and the resulting thermomechanical properties of A-AB-A triblock copolymers. Reversible addition-fragmentation chain transfer polymerization afforded a library of A-AB-A acrylic triblock copolymers, wherein the A unit contained cytosine acrylate (CyA) or post-functionalized ureido cytosine acrylate (UCyA) and the B unit consisted of n-butyl acrylate (nBA). Differential scanning calorimetry revealed two glass transition temperatures, suggesting microphase-separation in the A-AB-A triblock copolymers. Thermomechanical and morphological analysis revealed the effects of hydrogen bonding distribution and strength on the self-assembly and microphase-separated morphology. Dynamic mechanical analysis showed multiple tan delta (δ) transitions that correlated to chain relaxation and hydrogen bonding dissociation, further confirming the microphase-separated structure. In addition, UCyA triblock copolymers possessed an extended modulus plateau versus temperature compared to the CyA analogs due to the stronger association of quadruple hydrogen bonding. CyA triblock copolymers exhibited a cylindrical microphase-separated morphology according to small-angle X-ray scattering. In contrast, UCyA triblock copolymers lacked long-range ordering due to hydrogen bonding induced phase mixing. The incorporation of UCyA into the soft central block resulted in improved tensile strength, extensibility, and toughness compared to the AB random copolymer and A-B-A triblock copolymer comparisons. This study provides insight into the structure-property relationships of A-AB-A supramolecular triblock copolymers that result from tunable association strengths.

Microphase separation in block copolymer/homopolymer blends: Theory and experiment

1997 ◽  
Vol 106 (8) ◽  
pp. 3318-3328 ◽  
Author(s):  
G. Floudas ◽  
N. Hadjichristidis ◽  
M. Stamm ◽  
A. E. Likhtman ◽  
A. N. Semenov
Keyword(s):  
Block Copolymer ◽  
Microphase Separation ◽  
Homopolymer Blends ◽  
Theory And Experiment
Sign in / Sign up

Export Citation Format

Share Document