scholarly journals Rational synthesis of novel biocompatible thermoresponsive block copolymer worm gels

Soft Matter ◽  
2021 ◽  
Author(s):  
Deborah L. Beattie ◽  
Oleksandr O. Mykhaylyk ◽  
Anthony J. Ryan ◽  
Steven P. Armes
Keyword(s):  
Block Copolymer ◽  
Diblock Copolymer ◽  
Degree Of Polymerization ◽  
Amphiphilic Diblock Copolymer ◽  
Gelation Behavior ◽  
The Mean

Judicious control over the mean degree of polymerization of each block in a amphiphilic diblock copolymer ensures that the corresponding worm gel exhibits thermoreversible (de)gelation behavior, as judged by TEM, SAXS and rheology studies.

scholarly journals Can percolation theory explain the gelation behavior of diblock copolymer worms?

2018 ◽  
Vol 9 (35) ◽  
pp. 7138-7144 ◽  
Author(s):  
Joseph R. Lovett ◽  
Matthew J. Derry ◽  
Pengcheng Yang ◽  
Fiona L. Hatton ◽  
Nicholas J. Warren ◽  
...  
Keyword(s):  
Block Copolymer ◽  
Diblock Copolymer ◽  
Percolation Theory ◽  
Gelation Behavior ◽  
Physical Gelation

Physical gelation by block copolymer worms can be explained in terms of multiple inter-worm contacts using percolation theory, suggesting that worm entanglements are irrelevant in this context.

Synthesis of poly(methyl methacrylate)-b-poly(acrylic acid) by DPE method

e-Polymers ◽  
2008 ◽  
Vol 8 (1) ◽  
Author(s):  
Dong Chen ◽  
Ruixue Liu ◽  
Zhifeng Fu ◽  
Yan Shi
Keyword(s):  
Molecular Weight ◽  
Acrylic Acid ◽  
Methyl Methacrylate ◽  
Diblock Copolymer ◽  
Self Assembly ◽  
Gel Permeation Chromatography ◽  
Amphiphilic Diblock Copolymer ◽  
Poly Methyl Methacrylate ◽  
Copolymer Poly ◽  
Poly Acrylic Acid

AbstractAmphiphilic diblock copolymer poly(methyl methacrylate)-b-poly(acrylic acid) (PMMA-b-PAA) was prepared by 1,1-diphenylethene (DPE) method. Firstly, free radical polymerization of methyl methacrylate was carried out with AIBN as initiator in the presence of DPE, giving a DPE-containing PMMA precursor with controlled molecular weight. tert-Butyl acrylate (tBA) was then polymerized in the presence of the PMMA precursor, and PMMA-b-PtBA diblock copolymer with controlled molecular weight was prepared. Finally, amphiphilic diblock copolymer PMMA-b-PAA was obtained by hydrolysis of PMMA-b-PtBA. The formation of PMMA-b-PAA was confirmed by 1H NMR spectrum and gel permeation chromatography. Transmission electron microscopy and dynamic light scattering were used to detect the self-assembly behavior of the amphiphilic diblock polymers in methanol.

Well-defined skeletal macroporous polymer monoliths fabricated with a novel type of amphiphilic diblock copolymer as a phase separator

Polymer ◽  
2010 ◽  
Vol 51 (15) ◽  
pp. 3410-3415 ◽  
Author(s):  
Peiyong Xin ◽  
Li Qi ◽  
Rongyue Zhang ◽  
Chunhe Yao ◽  
Xiaoyi Wei ◽  
...  
Keyword(s):  
Diblock Copolymer ◽  
Polymer Monoliths ◽  
Amphiphilic Diblock Copolymer ◽  
Phase Separator

Surface morphology and wetting properties of surfaces coated with an amphiphilic diblock copolymer

2005 ◽  
Vol 575 (1-2) ◽  
pp. 125-135 ◽  
Author(s):  
Maïté Callewaert ◽  
Jean-François Gohy ◽  
Christine C. Dupont-Gillain ◽  
Laurence Boulangé-Petermann ◽  
Paul G. Rouxhet
Keyword(s):  
Surface Morphology ◽  
Diblock Copolymer ◽  
Amphiphilic Diblock Copolymer ◽  
Wetting Properties

scholarly journals Composition and Protein Precipitation Capacity of Condensed Tannins in Purple Prairie Clover (Dalea purpurea Vent.)

2021 ◽  
Vol 12 ◽  
Author(s):  
Qianqian Huang ◽  
Tianming Hu ◽  
Zhongjun Xu ◽  
Long Jin ◽  
Tim A. McAllister ◽  
...  
Keyword(s):  
Condensed Tannins ◽  
Quantum Coherence ◽  
High Performance ◽  
Degree Of Polymerization ◽  
Protein Precipitation ◽  
Early Flowering ◽  
Plant Tissues ◽  
Heteronuclear Single Quantum Coherence ◽  
The Mean ◽  
Different Tissues

This study aimed to determine the concentration and composition of condensed tannins (CT) in different tissues of purple prairie clover (PPC; Dalea purpurea Vent.) at different maturities and to determine their protein-precipitating capacity. The compositions of CT were elucidated after thiolysis with benzyl mercaptan followed by high-performance liquid-chromatography (HPLC) and 1H–13C heteronuclear single quantum coherence (HSQC) NMR spectroscopy. The results indicated that PPC flowering heads contained the highest CT concentration. Purple prairie clover CT consisted mainly of epicatechin (EC) and epigallocatechin (EGC) subunits. CT in the leaves were composed of more EC and less EGC than CT in stems and flowering heads at both the early flowering (EF) and late flowering (LF) head stages. The mean degree of polymerization was the highest for CT in stems and increased with maturity. CT isolated from PPC leaves at the early flowering head stage exhibited the greatest biological activity in terms of protein precipitation. Overall, the CT in PPC were predominantly procyanidins and the concentration and composition varied among the plant tissues and with maturity.

Self-Assemble Behavior of Amphiphilic Diblock Copolymer of Methoxy Poly (Ethylene Glycol)/Polyester

2011 ◽  
Vol 295-297 ◽  
pp. 11-15
Author(s):  
Hao Zhou ◽  
Qing Hong Liang ◽  
Xiang Ke Shi ◽  
Li Hua Lu ◽  
Li Qun Zhang ◽  
...  
Keyword(s):  
Polyethylene Glycol ◽  
Light Scattering ◽  
Diblock Copolymer ◽  
Diblock Copolymers ◽  
Average Diameter ◽  
Core Shell ◽  
Amphiphilic Diblock Copolymer ◽  
Amphiphilic Diblock Copolymers ◽  
Methoxy Polyethylene Glycol ◽  
Solution Polycondensation

Amphiphilic diblock copolymers based on methoxy polyethylene glycol (MePEG), 1, 6-hexanediol and maleic anhydride with different molar composition were synthesized by solution polycondensation. Self-assemble behavior of amphiphilic diblock copolymer in different solvents by dialyzing technique was discussed. The micelle morphologhy was observed by TEM. It was found that well core-shell MePEG1900/Polyester 2162 copolymer nanoparticles can be formed by self-assemble in acetone solution. In addition, the size of nanospheres measured using dynamic light scattering exhibited a narrow monodisphere size distribution and an average diameter in the ranger of less than 200nm.

scholarly journals Synthesis and self-assembly of a novel amphiphilic diblock copolymer consisting of isotactic polystyrene and 1,4-trans-polybutadiene-graft-poly(ethylene oxide)

RSC Advances ◽  
2018 ◽  
Vol 8 (23) ◽  
pp. 12752-12759
Author(s):  
HuaQing Liang ◽  
QiHua Zhou ◽  
YongJiang Long ◽  
WanChu Wei ◽  
Shuo Feng ◽  
...  
Keyword(s):  
Ethylene Oxide ◽  
Diblock Copolymer ◽  
Self Assembly ◽  
Amphiphilic Diblock Copolymer ◽  
Isotactic Polystyrene ◽  
Poly Ethylene Oxide ◽  
Assembly Behavior ◽  
Poly Ethylene

Herein, a novel amphiphilic diblock copolymer consisting of isotactic polystyrene and 1,4-trans-polybutadiene-graft-poly(ethylene oxide) was synthesized and its self-assembly behavior was investigated.

Photocleavable amphiphilic diblock copolymer with an azobenzene linkage

RSC Advances ◽  
2016 ◽  
Vol 6 (62) ◽  
pp. 57227-57231 ◽  
Author(s):  
Jilei Wang ◽  
Yiyun Ouyang ◽  
Shang Li ◽  
Xiaogong Wang ◽  
Yaning He
Keyword(s):  
Diblock Copolymer ◽  
Uv Light ◽  
Light Irradiation ◽  
Amphiphilic Diblock Copolymer ◽  
Colloidal Aggregates ◽  
Uv Light Irradiation

Diblock copolymer with an azobenzene linkage can be efficiently photocleaved upon UV light irradiation. Thus, the colloidal aggregates of this kind of amphiphilic diblock copolymer will be disrupted due to the cleavage of the azobenzene junction.

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