Acid-containing polymers, hydrogen

Acid-containing polymers, hydrogen bonding, 260 Acrylic monomers photografting, 172,173/,174 UV curing, 212-213 Acrylic-acrylic block copolymers, synthesis, 259... 

Harthcock M.A., Probing the complex hydrogen bonding stmeture of urethane block co-pol3miers and various acid containing copolymers using infra red spectroscopy. Polymer, 30, 1234, 1989. 

The interaction of the polymer with the filler is promoted by the presence of reactive functionality in the polymer, capable of chemical reaction or hydrogen bonding with the functionality, generally hydroxyl, on the surface of the filler. Thus, carboxyl-containing polymers, e.g. ethylene-acrylic acid copolymers and maleic anhydride- and acrylic acid-grafted polyethylene and polypropylene interact readily with fillers. 

Both lyotropic and thermotropic liquid-crystalline synthetic polymers have been widely studied. Aromatic polyamides constitute the most important class forming liquid-crystalline solutions the solvents are either powerfully protonating acids such as 100% sulphuric acid, chloro-, fluoro- or methane-sulphonic acid, and anhydrous hydrogen fluoride, or aprotic dipolar solvents such as dimethyl acetamide containing a small percentage, usually 2-5 %, of a salt such as lithium chloride or calcium chloride. Such solutions constitute a nematic phase within certain limits. Some criteria for formation of a nematic instead of an isotropic phase are ... 

By far the best monomers for GTP are the methacrylates. Glycidyl methacrylate and other substituted members of the family can be used to make highly functional block polymers. If the monomer contains active hydrogen, for example, hydroxyethyl methacrylate or methacrylic acid, GTP does not proceed. These functions can, however, be masked by trimethylsilyl groups [9] (Scheme 5). 

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