Ketone-containing polymers

Other studies on ketone containing polymers include copolymers of unsaturated ketones with styrene and methyl methacrylate and poly(methylisoprenyl ketones) for use as photoresists. A review has appeared on the laser flash photolysis of vinyl ketones. ... 

These preliminary results are consistent with all of our e erience to date on the photooxidation of ketone-containing polymer s( 12). 

Comparative Effects of UV photons and y-Rays on the Degradation and Cross-Linking of Model Ketone-Containing Polymers Diarylethene (DA) Doped Polymers as Dosimeters... 

A more effective approach to enhancing the rate of photodegradation of PS is to copolymerize styrene with a small amount of a ketone-containing monomer. Thus the ketone groups are attached to the polymer during its manufacture (Pig. 13) (98,100). 

They show good to excellent resistance to highly aromatic solvents, polar solvents, water and salt solutions, aqueous acids, dilute alkaline solutions, oxidative environments, amines, and methyl alcohol. Care must be taken in choice of proper gum and compound. Hexafluoropropylene-containing polymers are not recommended for use in contact with ammonia, strong caustic (50% sodium hydroxide above 70°C), and certain polar solvents such as methyl ethyl ketone and low molecular weight esters. However, perfluoroelastomers can withstand these fluids. Propylene-containing fluorocarbon polymers can tolerate strong caustic. 

The hydrosi(ly)lations of alkenes and alkynes are very important catalytic processes for the synthesis of alkyl- and alkenyl-silanes, respectively, which can be further transformed into aldehydes, ketones or alcohols by estabhshed stoichiometric organic transformations, or used as nucleophiles in cross-coupling reactions. Hydrosilylation is also used for the derivatisation of Si containing polymers. The drawbacks of the most widespread hydrosilylation catalysts [the Speier s system, H PtCl/PrOH, and Karstedt s complex [Pt2(divinyl-disiloxane)3] include the formation of side-products, in addition to the desired anh-Markovnikov Si-H addition product. In the hydrosilylation of alkynes, formation of di-silanes (by competing further reaction of the product alkenyl-silane) and of geometrical isomers (a-isomer from the Markovnikov addition and Z-p and -P from the anh-Markovnikov addition. Scheme 2.6) are also possible. 

Hydrazide derivatives also may be prepared from a periodate-oxidized dextran polymer or from a carboxyl-containing dextran derivative by reaction with te-hydrazidc compounds (Chapter 4, Section 8). A hydrazide terminal spacer provides reactivity toward aldehyde- or ketone-containing molecules. Thus, the hydrazide-dextran polymer can be used to conjugate specifically glycoproteins or other polysaccharide-containing molecules after they have been oxidized with periodate to form aldehydes (Chapter 1, Section 4.4). 

To a methyl ethyl ketone solution of =Si—H containing polymers or copolymers, a cold solution (ca. -10 °C) of dimethyldioxirane in acetone was quickly added and reacted for 30 min at 0 °C. The mole ratio of dioxirane to polymer was ca. 1.2 1.3. The resulting silanol polymers or copolymers were obtained either in solution or precipitated into hexanes followed by vacuum dry at 40 °C for 24 h. 

This heterocycle has been reported to result from a ring expansion reaction of a pendant oxirane with a ketone (75MI11107). The insertion reaction (Scheme 100) was conveniently conducted in high yield by treatment of a solution of a glycidyl methacrylate-containing polymer (208) employing the ketone as solvent. 

These tellurium-containing polymers were checked for their catalytic activity in the ep-oxidation of olefins1 and as oxidizing agents2. The polymeric 4-methoxyphenyl tellurium oxide did not react with amines, amides, alcohols, or phenols, but oxidized hydroquin-ones to quinones, thiols to disulfides, thioketones to ketones, thioesters to esters, and thiobenzamides in organic solvents to cyanobenzenes and in acetic acid to 2,5-diaryl-4,l,3-thiadiazoles2. 

The reaction rate of benzophenone hydrogenation on the imprinted polymer is higher than the other ketones in competitive reaction experiments. On the contrary, those ketones react with similar rates on a Ru-containing polymer without imprinted cavities. The rate of reaction was enhanced by a factor of 7 for benzophenone compared with the other ketones [54]. 

Kobayashi prepared a novel germanium-containing polymer, poly(germanium enolate), by reaction of a divalent germanium compound, germylene, with a cyclic a, -unsaturated ketone in the presence of a catalytic amount of a lithium compound (Scheme 11.65) [91[. 

Johnson, R. N., A. G. Kamham, F. A. Clendinning, W. F. Hale, and C. N. Merriman. 1967. Facile synthesis and properties of semicrystallization co-poly (arglene ether ketone) containing hydroquinone and photoalazinone. Journal of Polymer Science, Part A 5 2375. 

Hydrogen Bonding Ring Containing Polymers Poly(enamine—Ketones)... 

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