Reactive groups on resins

Attachment of carboxyl-terminal amino acid to reactive group on resin. 

The potential for hydrogen bonding between a phenolic resin and wood depends upon (1) The number of reactive groups on the resin and wood molecules at which hydrogen bonding may occur (2) The ability of the adhesive to wet and penetrate the capillary structure of the wood ... 

For optimum performance of the compound or composite, it is best to have an organosilane functionality that will react with the polymer matrix. For instance, an epoxy resin has the proper reactive groups to form covalent bonds with especially epoxy and amino silanes. For many thermoplastic polymers, this is made more difficult by the lack of reactive groups on the polymer. Here, the proper silane that can improve compatibility with the polymer will likely provide an improvement in physical properties. 

SWELLING - The expansion of an ion-exchange which occurs when the reactive groups on the resin are converted from one form to another. 

Exchange sites Reactive groups on an ion-exchange resin. 

The reactions of reactive resins can be considered as special cases of polymer analog reactions. Reactive resins can be subclassified as polymer reagents and ion-exchange resins. Also, special cases occur when two reactive groups on the same chain react with bifunctional reagents (cycliza-tion and transannulation). 

Bisphenoi A-epichlorhydrin resins may be blended with a variety of other resins which contain reactive groups. On curing, interaction occurs to give a cross-linked copolymer which exhibits characteristics of the two straight resins. Examples of resins used in conjunction with epoxy resins are ... 

This compound is soluble in most organic solvents and may be easily copolymerized with other vinyl monomers to introduce reactive side groups on the polymer chain (18). Such reactive polymer chains may then be used to modify other polymers including other amino resins. It may be desirable to produce the cross-links first. Thus, A/-methylolacrylamide can react with more acrylamide to produce methylenebisacrylamide, a tetrafunctional vinyl monomer. 

The formation of covalent bonds between resin molecules in a coating and the surface of the substrate can enhance adhesion. Thus, adhesion to glass is promoted by reactive silanes having a trimethoxysilyl group on one end that reacts with a hydroxyl group on the glass surface. The silanes have... 

Purify the SH-labeled oligo by gel filtration on a desalting resin using 10 mM sodium phosphate, 0.15 M NaCl, 10 mM EDTA, pH 7.2. The probe now may be used to conjugate with an activated enzyme, biotin, fluorescent tag, or other molecules containing a sulfhydryl-reactive group. 

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