Monofunctional alcohols will combine with a difunctional
epoxy to create a linear polymer.
The presence of China and Russia as assertive players, combined with divergent political views within the BRICS, generated a tacit "rule" of not discussing issues that directly involve one of the members, which on the other hand makes the treatment of relevant international issues in the group seriously difunctional
. The procedure of skipping relevant but sensitive issues was applied, for instance, when Russia annexed Crimea in March 2014, triggering incisive condemnations by world leaders and in the UN General Assembly.
Different reaction kinetics is related to different functionalities of the reagents (DDM is tetrafunctional and PA is difunctional
), which results in a higher cross-link density and a more rigid network cured with DDM.
Hydrophilic comonomers including mono- and difunctional
(2003) who have used 1,4-butanediol as difunctional
chain extender which results into increase in density and compressive strength.
In our initial screening, we used difunctional
urethane acrylate oligomers (UA) to mimic the softer polyol regions in the traditional two-part systems and trifunctional acrylate crosslinkers (M) for the harder isocyanate regions.
Hayashi, Synthesis of Novel UV-Curable Difunctional
Thirteen Methacrylate Plastic Lenses, Prog.
Pluronic[R]F-68 (polyoxyethylene-polyoxypropylene block copolymer; a relatively nontoxic difunctional
surfactant) and poly(ethylene glycol)methyl methacrylate can be grafted to poly(dimethyl siloxane) surfaces to improve their wettability and to reduce bacterial adhesion.
Suitable polyols for use in the present invention include difunctional
and trifunctional alcohols, and the acids include aliphatic and aromatic polycarboxylic acids and their esters.
These are multifunctional or linear difunctional
silicone prepolymers with reactive terminal end groups that allow modification of coating performance through incorporation of silicone moieties into coating resins and binders.
Terminologies such as tailored bimodal or controlled long-chain branching discuss the addition of difunctional
diene monomers such as vinylnorbomene or hexadiene comonomers that essentially couple the polymer chains to form an H-branched structure.