γ‐ray initiated copolymerization of ethylene and carbon monoxide

Colombo, P.; Steinberg, M.; Fontana, J.

doi:10.1002/pol.1963.110010813

Cited by 18 publications

(3 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The competitive process involves the copolymerization of the monomer with carbon monoxide under high pressure. 32 In a program to develop monomers that expand upon polymerization, we had prepared a series of spiro ortho esters, spiro ortho carbonates, trioxabicyclooctanes,. and ketal lactones that could be polymerized with ring opening by ionic expansion in volume.…”

Section: XXXVmentioning

confidence: 99%

Free Radical Ring-Opening Polymerization

Bailey

1985

Polym J

View full text Add to dashboard Cite

Although unstrained five-or six-membered carbocyclic systems undergo free radical ring-closing polymerization, the introduction of an oxygen into the ring will promote free radical ring-opening polymerization, since the resulting carbon-oxygen double bond is approximately 50 kcal more stable than a carbon-carbon double bond. Thus, cyclic ketene acetals, cyclic ketene aminals, cyclic vinyl ethers, unsaturated spiro ortho carbonates, and unsaturated spiro ortho esters will all undergo free radical ring-opening polymerization. Copolymerization of these monomers with a wide variety of vinyl monomers will introduce an ester, amide, keto or carbonate group into the backbone of an addition polymer and can make possible the synthesis of functionally terminated oligomers, biodegradable addition polymers, thermally stable polymers, and monomers that expand on polymerization. KEY WORDS Free Radical Ring-Opening Polymerization I 2-Methylene-1 ,3-dioxepane 1 Polyesters I Functionally-terminated Oligomers I Unsaturated Spiro a-Carbonates I '\N+

show abstract

Section: XXXVmentioning

confidence: 99%

Free Radical Ring-Opening Polymerization

Bailey

1985

Polym J

View full text Add to dashboard Cite

show abstract

“…Figure 14 shows typical melting and crystallization thermograms for copolymers containing 38. 8 and 50.0y0 GO. These copolymers were formed at 2OOC.…”

Section: Melting Pointsmentioning

confidence: 95%

Co⁶⁰ γ‐radiation‐induced copolymerization of ethylene and carbon monoxide

Colombo

Kukacka

Fontana

et al. 1966

J. Polym. Sci. A‐1 Polym. Chem.

Self Cite

View full text Add to dashboard Cite

SynopsisThe yradiation-induced free-radical copolymerization of ethylene and CO has been investigated over a wide range of pressure, initial gas composition, radiation intensity, and temperature. At 2O"C., concentrations of CO up to 1% retard the polymerization of ethylene. Above this concentration the rate reaches a maximum between 27.5 and 39.2% CO and then decreases. The copolymer composition increases only from 40 to 50% CO when the gas mixture is varied from 5 to 90% CO. A relatively constant reactivity ratio is obtained a t 20°C., indicating that CO adds 23.6 times as fast as an ethylene monomer to an ethylene free-radical chain end. For a 50% CO gas mixture, the above value of 23.6 and the copolymerization rate decrease with increasing temperature to 200°C. The kinetic data indicate a temperature-dependent depropagation reaction. Infrared examination of copolymers indicates a polyketone structure containing -CH-CHand -COunits. The crystalline melting point increases rapidly from 111 to 242"C., as the CO concentration in the ,copolymer increases from 27 to 50%. Molecular weight of copolymer formed a t 20°C. increased with increasing CO, indicating a,, values >20,000. Increasing reaction temperature results in decreasing molecular weight. Onset of decomposition for a 50% CO copolymer was measured at -250OC.

show abstract

“…X-Ray diffraction diagrams of copolymers of carbon monoxide with: ( 1 ) cyclohexane;(8) cyclohexene; (3)4vinyl-1-cyclohexane; ( 4 ) cyclopentadiene; ( 5 ) irradiation product of carbon monoxide.…”

mentioning

confidence: 99%

γ‐ray‐induced copolymerization of carbon monoxide with cyclic hydrocarbons

Kagiya

Kondo

Fukui

et al. 1969

J. Polym. Sci. A‐1 Polym. Chem.

View full text Add to dashboard Cite

The γ‐ray‐induced copolymerization of carbon monoxide with saturated or unsaturated cyclic hydrocarbons, such as cyclohexane, cyclohexene, 4‐vinyl‐1‐cyclohexene, and cyclopentadiene was studied at 30°C. Resinous or powdery polymers were obtained in the copolymerization. The results of elementary analysis, infrared spectra, and NMR spectra showed that copolymers containing ketone and ring structures were produced. The copolymers were confirmed to be partially crystalline by the x‐ray diffraction diagram. Further, the influence of the addition of ethylenimine on the copolymerization of carbon monoxide with cyclohexane or cyclohexene was examined. A powdery polymer formed in the copolymerization was concluded to be a terpolymer of carbon monoxide with cyclic hydrocarbon and ethylenimine. On the basis of the experimental results, a mechanism of the copolymerization is proposed.

show abstract

γ‐ray initiated copolymerization of ethylene and carbon monoxide

Cited by 18 publications

References 5 publications

Free Radical Ring-Opening Polymerization

Free Radical Ring-Opening Polymerization

Co⁶⁰ γ‐radiation‐induced copolymerization of ethylene and carbon monoxide

γ‐ray‐induced copolymerization of carbon monoxide with cyclic hydrocarbons

Contact Info

Product

Resources

About

γ‐ray initiated copolymerization of ethylene and carbon monoxide

Cited by 18 publications

References 5 publications

Free Radical Ring-Opening Polymerization

Free Radical Ring-Opening Polymerization

Co60 γ‐radiation‐induced copolymerization of ethylene and carbon monoxide

γ‐ray‐induced copolymerization of carbon monoxide with cyclic hydrocarbons

Contact Info

Product

Resources

About

Co⁶⁰ γ‐radiation‐induced copolymerization of ethylene and carbon monoxide