Organic polymers functional groups

If you take ethylene glycol, with its alcohol functional groups on both carbons, and react it with terephthalic acid, with its two organic acid functional groups, you can eliminate water and form the condensation polymer polyethylene terephthalate (PET), a polyester. Figure 16-7 shows the synthesis of PET. 

N-Phosphoryl Substituted Phosphoranimines. In addition to being use l as condensation "monomers Scheme 2), the N-silylphosphoranimines have a rich and varied chemistry of their own. Three distinct modes of reactivity Scheme 5) are well documented. Cleavage of the Si-N bond is typified by a series of transsilylation reactions with substituted chlorosilanes (75) while the deprotonation-substitution chemistry has led to a wide variety of P-CH2-E derivatives containing silyl, 16) phosphinyl, (77) and organic 18) functional groups. Some of these latter reactions serve as useful model systems for similar derivative chemistry of the preformed phosphazene polymers such as [Me(Ph)P=N]n. 6)... 

Miscellaneous Curing Reactions. Other functional groups can react with the thiol terminal groups of the polysulfides to cross-link the polymer chains and build molecular weight. For example, aldehydes can form thioacetals and water. Organic and inorganic acids or esters can form thioesters. Active dienes such as diacrylates can add to the thiols (3). Examples of these have been mentioned in the Hterature, but none have achieved... 

The resins used are highly cross-linked organic polymers with acidic functional groups. The most common of the resins used are sulfonated copolymers of styrene and divinylben2ene (see Ion exchange). 

Surfaces of inorganic soHds can be functionalized with catalytic groups just as organic polymers can. For example, the hydroxyl groups on the surface of siUca can be used for synthesis of the following stmcture ... 

Acrylic polymers are also important in the preparation of other classes of adhesives, especially pressure sensitive adhesives. This discussion will be limited to adhesives that cure by the reaction of unsaturated acrylic functional groups. These adhesives are also sometimes termed Methacrylate , Methacrylic or Structural Acrylic adhesives. This is consistent with the long-standing habit of organic chemists to assign multiple names to the same substance. 

The main advantage of PEO as a host is that it is chemically and electrochemically stable since it contains only strong unstrained C-O, C-C, and C-H bonds. The disadvantage is the inherent crystallinity, and considerable effort has gone into synthesizing all-amorphous polymer hosts. Unfortunately, with the bulk conductivity as the prime motivator, many amorphous polymer hosts incorporate organic functional groups which limit their practical application. Detailed accounts of many of the hosts synthesized have been reviewed [8, 32-36],... 

Nonionic functional groups provide steric repulsion and improved particulate adsorption. Each of the various polymers, phosphonates, and other organics employed have combinations of functions. The overall molecules may act as ... 

As an organic polymer, poly(tetramethylene oxide) was also used for the preparation of ceramers. The mechanical properties in these cases were much improved in comparison with those for hybrids from polysiloxanes. In these poly (tetramethylene oxide)-silica hybrids, the effect of the number of functional triethoxysilyl groups was examined [13]. As shown in Fig. 2, more multifunctional organic polymer produced more crosslinked hybrid networks. This means that the more rigid the structure in the hybrids is, the higher the modulus and the lower swelling property. 

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