Epoxide polymers

Cationic polymerization in hot melts has been applied to epoxidized polymers [38,39]. No hot melts based on vinyl ether or other cation-sensitive functionalized polymers have been described in the literature. With cationic systems, it is important that the other ingredients in the adhesive be of low basicity to avoid scavenging the initiating acid generated by the photoinitiator. 

Propylene Oxide Polymers and Higher 1,2-Epoxide Polymers" under "Polyethers" in ECT3rd ed., Vol. 18, pp. 633—645, by R. A. Newton, Dow Chemical... 

Epoxide polymers exhibit stereoisomerism originating from the chirality of tertiary carbon atoms present in the polymer main chain. The stereoisomers of epoxide polymers are therefore tactic polymers their tacticity is connected with the structure of epoxide monomers undergoing polymerisation. Epoxide... 

Figure 9.1 Structure of epoxide polymers of various tacticity obtained from mono- and disubstituted epoxides...

The formation of epoxide polymers with a very high molecular weight by the discussed catalysts containing associated multinuclear species (— Zn-0— Zn O >) indicates that only a small fraction of the metal species in the catalyst is effective for the polymerisation. The broad molecular weight distribution of polymers yielded by these catalysts corresponds to the existence of various active sites [30]. 

Warfield, R. W., Petree, M. C. A study of the polymerization of epoxide polymers by electrical resistivity techniques, Polymer, 1, 178 (1960)... 

Chlorinated, sulfonated, chlorosulfonated or epoxidized polymers, homopolymers and copolymers of functionalized monomers, e.g. poly(methacryl aldehyde), poly(2,3-epoxypropyl acrylate), poly(4-vinylphenol), poly(propylene-co-10-unde-cene-l-ol), poly(butadiene-co-methacryl aldehyde), poly(butadiene-co-acrylic acid), poly(ethylene-co-alkyl acrylate), poly(alkyl acrylate-co-2,3-epoxypropyl acrylate), poly(alkyl acrylate-co-maleic anhydride), poly(styrene-co-4-vinylbenzyl chloride)... 

Freon E [Du Pont]. TM for a series of hydrogen endcapped tetrafluoroethylene epoxide polymers having a DP up to 10, boiling range 39—49 C, high dielectric constant. 

Chiral Co(III)-salen complexes can also serve as efficient catalysts for HKR of terminal epoxides. Polymer-supported chiral salen complexes 156 were prepared from chiral Co complex 154 and ethylene glycol dimethacrylate 155, as shown in Scheme 3.45. The chemical reduction of 156, followed by treatment with acetic acid under aerobic conditions, produced the catalytically active polymer 157, which was used in the HKR of propylene oxide [87]. Some other examples of polymeric salen-Co complexes have also been reported for the same reaction [88, 89]. 

This type of grafting has been observed for living polyTHF and polymers containing epoxide rings, e.g. epoxidized polymer. The living and growing polyTHF reacts at... 

Though the gas number of ABFA is normally 220-260 cm /g, it can go up to 420 cm /g in the presence of catalysts. Azodicarbonamide is recommended for foaming of PVC, polyolefins, polyamides, polysiloxanes, epoxides, polymers and compolymers of acrylonitrile and acrylates, and rubbers. 

Vandenberg, E.J., 1969. Epoxide polymers synthesis stereochemistry structure and mechanism. J. Polym. Sci. Part A Polym. Chem. 7 (2), 525-567. 

Epoxides, polymers, epoxy resins. See Epoxy resin... 

Synonyms Condensation prods., epoxy Epoxides, polymers, epoxy resins Epoxy compds. Ethers, cyclic, epoxides, polymers Plastics, epoxy Polyethers, epoxy resins Classification Polymer... 

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