Multiple Hydrogen Bonding for the Noncovalent Attachment of Ionic Functionality in Triblock Copolymers

2007 ◽  
Vol 40 (13) ◽  
pp. 4396-4398 ◽  
Author(s):  
Brian D. Mather ◽  
Margaux B. Baker ◽  
Frederick L. Beyer ◽  
Matthew D. Green ◽  
Michael A. G. Berg ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Triblock Copolymers ◽  
Multiple Hydrogen Bonding

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.

scholarly journals The Multiple Hydrogen-Bonding Networks of Polyol Ribitol

2018 ◽  
Vol 24 (51) ◽  
pp. 13408-13412 ◽  
Author(s):  
Isabel Peña ◽  
Maria Eugenia Sanz ◽  
Elena R. Alonso ◽  
José L. Alonso
Keyword(s):  
Hydrogen Bonding ◽  
Hydrogen Bonding Networks ◽  
Multiple Hydrogen Bonding

Hydrogen-Bonding Mediated Self-Assembly of Amphiphilic ABA Triblock Copolymers into Well-Defined Giant Vesicles

2021 ◽  
Author(s):  
Huiying Wang ◽  
Qiang Chen ◽  
Zhen Geng ◽  
Jingyi Rao ◽  
Bijin Xiong ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Self Assembly ◽  
Triblock Copolymers ◽  
Giant Vesicles

Giant vesicles represent an extremely useful system to mimick biomembranes; however, available methodologies towards easy and direct vesicles construction are still scarce. By designing a hydrogen-bonding (H-bonding) amphiphilic ABA triblock...

Piezochromic luminescence of AIE-active molecular co-crystals: tunable multiple hydrogen bonding and molecular packing

2018 ◽  
Vol 6 (36) ◽  
pp. 9660-9666 ◽  
Author(s):  
Bo Lu ◽  
Yujian Zhang ◽  
Xiaogang Yang ◽  
Kai Wang ◽  
Bo Zou ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Damage Detection ◽  
Vital Role ◽  
Molecular Packing ◽  
Smart Sensors ◽  
Multiple Hydrogen Bonding

Prominent piezochromic materials play a vital role in the development of damage detection devices and smart sensors.

Exclusive Recognition of Acetone in a Luminescent BioMOF through Multiple Hydrogen-Bonding Interactions

2019 ◽  
Vol 58 (12) ◽  
pp. 7667-7671 ◽  
Author(s):  
Yong-Liang Huang ◽  
Pei-Li Qiu ◽  
Jian-Ping Bai ◽  
Dong Luo ◽  
Weigang Lu ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Hydrogen Bonding Interactions ◽  
Multiple Hydrogen Bonding
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