Polymerization of Methyl Isopropenyl Ketone

Brown, Frances C.; Berardinelli, F. M.; Kray, R. J.; Rosen, Lawrence

doi:10.1021/ie50589a044

Cited by 3 publications

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“…Besides, methyl- [ 2 ], t-butyl- [ 3 ], phenyl vinyl ketones [ 4 ], some higher alkyl vinyl ketones [ 3 ], and optically active vinyl ketones, such as [(s)-1-methyl-propyl]vinyl ketone, [(s)-2-methyl-butyl]vinyl ketone, and [(s)-3-methyl-pentyl]vinyl ketone [ 5 ] polymerize in bulk even at room temperature. Azobisisobutyronitrile (AIBN) is found to be a more efficient radical initiator than benzoyl peroxide in the bulk polymerization of methyl isopropenyl ketone [ 6 ], while both initiators are effective in the radical polymerization of phenyl vinyl ketone in hydrocarbon solution [ 7 , 8 ]. Both ultraviolet and gamma radiation initiate radical polymerization of methyl vinyl ketone [ 9 ], methyl isopropenyl ketone [ 10 , 11 , 12 ], and phenyl vinyl ketone [ 4 ] providing the formation of cross-linked polymers in bulk or in acetone and a colored polymer with intramolecular aldol linkages:…”

Section: Introductionmentioning

confidence: 99%

Novel Mesogenic Vinyl Ketone Monomers and Their Based Polymers

et al. 2022

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In the present research, we have synthesized new vinyl ketone monomers with mesogenic substituents, namely, 8-(3′-chloro-4′-pentyl-[1,1′-biphenyl-4-oxy)oct-1-en-3-one (BVK) and 8-[2′-chloro-4′′′-octyl-[1,1′:4′,1′′:4′′,1′′′-quaterphenyl-4-oxy]oct-1-en-3-one (QVK). The comparison of BVK, QVK, and previously synthesized 8-((4′′-((1R,4S)-4-butylcyclohexyl)-2′-chloro-[1,1′,4′,1′′-terphenyl]-4-yl)oxy)oct-1-en-3-one (TVK) has revealed that all of them are able to form crystals, while their ability to exhibit liquid crystalline behavior depends on the number of phenyl substituents attached to the para-position of the phenoxy group and is observed for TVK and QVK only. All of the monomers are able to achieve self-polymerization upon heating and free radical polymerization in bulk or in solution under the action of the common radical initiator AIBN. We have also succeeded in the RAFT polymerization of the synthesized vinyl ketones BVK and TVK using asymmetrical trithiocarbonates. The synthesized poly(vinyl ketones) exhibit LC behavior and are able to undergo photodegradation upon UV irradiation.

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Section: Introductionmentioning

confidence: 99%

Novel Mesogenic Vinyl Ketone Monomers and Their Based Polymers

et al. 2022

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Radiolysis of polymethyl isopropenyl ketone

Shultz

1960

J. Polym. Sci.

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Polymethyl isopropenyl ketone (PMIPK) undergoes random chain scission when irradiated at 23°C. with gamma rays or with ultraviolet light. Total energy absorption per chain scission, Ed, is 94 e.v./scission for PMIPK powders irradiated in vacuo with spent reactor fuel element gamma rays (0.42 Mrad/hr.). Ed is 84 e.v./scission for a PMIPK powder irradiated in vacuo with Co60 gamma rays (0.109 Mrad/hr.). The presence of air lowers the value of Ed to 41 e.v./scission under the former conditions. A film of PMIPK irradiated in air with 2537‐A. wavelength light exhibits Ed = 22 e.v./scission or a quantum yield ϕd = 0.22 chain scissions/absorbed photon. The viscosity‐average molecular weights of this film vary with light exposure in accordance with theoretical predictions.

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Ladder polymers

Overberger

Moore

1970

Advances in Polymer Science

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Polymerization of Methyl Isopropenyl Ketone

Cited by 3 publications

References 1 publication

Novel Mesogenic Vinyl Ketone Monomers and Their Based Polymers

Novel Mesogenic Vinyl Ketone Monomers and Their Based Polymers

Radiolysis of polymethyl isopropenyl ketone

Ladder polymers

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