Macro-azo-initiators having cinnamate end groups: synthesis, characterization and photopolymerization with 2-hydroxyethyl methacrylate

Polimery ◽  
2001 ◽  
Vol 46 (11/12) ◽  
pp. 812-816 ◽  
Author(s):  
ROMAN JANTAS ◽  
TADEUSZ WODKA ◽  
GRAZYNA JANOWSKA
Keyword(s):  
Hydroxyethyl Methacrylate ◽  
End Groups ◽  
Azo Initiators

scholarly journals Synthesis of a resin monomer-soluble polyrotaxane crosslinker containing cleavable end groups

2014 ◽  
Vol 10 ◽  
pp. 2623-2629 ◽  
Author(s):  
Ji-Hun Seo ◽  
Shino Nakagawa ◽  
Koichiro Hirata ◽  
Nobuhiko Yui
Keyword(s):  
Vickers Hardness ◽  
Composite Resins ◽  
Hydroxyethyl Methacrylate ◽  
End Groups ◽  
Biomedical Field ◽  
Urethane Dimethacrylate

A resin monomer-soluble polyrotaxane (PRX) crosslinker with cleavable end groups was synthesized to develop degradable photosetting composite resins. The PRX containing 50 α-cyclodextrins (α-CDs) with disulfide end groups was initially modified with n-butylamine to obtain a resin monomer-soluble PRX. The PRX containing 13 n-butyl groups per α-CD molecule was completely soluble in conventional resin monomers such as 2-hydroxyethyl methacrylate (HEMA) and urethane dimethacrylate (UDMA). The synthesized n-butyl-containing PRX was further modified with 2-aminoethyl methacrylate to provide crosslinkable acrylic groups onto PRX. The prepared resin monomer-soluble PRX crosslinker was successfully polymerized with a mixture of HEMA and UDMA to provide photosetting plastic. It was confirmed that the Vickers hardness of the prepared plastic was greatly decreased after treatment with dithiothreitol. This indicates that the resin monomer-soluble PRX crosslinker can be applied to design degradable photosetting plastics potentially used in the industrial or biomedical field.

Photoyellowing behavior of non-phenolic lignin models representative of end groups and β-ether structures

2004 ◽  
Vol 19 (2) ◽  
pp. 146-154
Author(s):  
Jim Parkås ◽  
Magnus Paulsson ◽  
Shiming Li ◽  
Knut Lundquist ◽  
Ulla Westermark
Keyword(s):  
End Groups

Synthesis, Characterization, and Dynamic Behavior of Well-defined Dithiomaleimide-functionalized Maltodextrins

2020 ◽  
Vol 17 (2) ◽  
pp. 85-89
Author(s):  
Francisco J. Hidalgo ◽  
Nathan A.P. Lorentz ◽  
TinTin B. Luu ◽  
Jonathan D. Tran ◽  
Praveen D. Wickremasinghe ◽  
...  
Keyword(s):  
Physicochemical Properties ◽  
Dynamic Behavior ◽  
Industrial Applications ◽  
19F Nmr ◽  
Nmr Studies ◽  
Synthetic Pathway ◽  
End Groups ◽  
Sugar End

: Maltodextrins have an increasing number of biomedical and industrial applications due to their attractive physicochemical properties such as biodegradability and biocompatibility. Herein, we describe the development of a synthetic pathway and characterization of thiol-responsive maltodextrin conjugates with dithiomaleimide linkages. 19F NMR studies were also conducted to demonstrate the exchange dynamics of the dithiomaleimide-functionalized sugar end groups.

Rotationsbarriere der Endgruppen bei Poly- methinoxonolen verschiedener Kettenlänge / Rotation Barrier of the End Groups of Polymethine Oxonols with Different Chain Lengths

1976 ◽  
Vol 31 (8) ◽  
pp. 1017-1018 ◽  
Author(s):  
H. Oehling ◽  
F. Baer
Keyword(s):  
Nmr Spectra ◽  
Rotation Barrier ◽  
Free Enthalpy ◽  
Temperature Dependent ◽  
Restricted Rotation ◽  
H Nmr ◽  
Enthalpy Of Activation ◽  
End Groups ◽  
Electron Contribution ◽  
Chain Lengths

Abstract Polymethine oxonols show temperature dependent 1H-NMR-spectra because of restricted rotation of the end groups. The dependence of the value of the corresponding free enthalpy of activation AGt on the length of the poly-methine chain can be explained by the change of the π-electron contribution to ⊿G≠.

Patterned Poly(2-hydroxyethyl methacrylate) Brushes on Silicon Surfaces Behave as “Tentacles” To Capture Ferritin from Aqueous Solution

2009 ◽  
Vol 1 (7) ◽  
pp. 1525-1532 ◽  
Author(s):  
Jem-Kun Chen ◽  
Zong-Yan Chen ◽  
Han-Ching Lin ◽  
Po-Da Hong ◽  
Feng-Chih Chang
Keyword(s):  
Aqueous Solution ◽  
Silicon Surfaces ◽  
Hydroxyethyl Methacrylate
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