Cationic Polymerization of Exo-2,3-epoxynorbornane

Malhotra, S. L.; Leborgne, Alain; Blanchard, L. P.

doi:10.1080/00222337708061290

Cited by 5 publications

(2 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This suggests that the protonation or alkylation at the oxygen atom of the epoxide group in epoxynorbornanes is more difficult and that they are also poorer nucleophiles than epoxycyclohexanes. Lastly, other workers have observed that only low molecular weight products ( M n <1000) were obtained in the thermally initiated cationic polymerization of 2,3-epoxynorbornane using trityl hexafluoroantimonate.…”

Section: Resultsmentioning

confidence: 98%

“…To ensure that of most of the epoxide groups present in polymers obtained by photopolymerization had reacted, films of the polymers were heated in an oven at 70 °C for 24 h. Attempts to measure the T g of the polymers from epoxynorbornane functional siloxanes using DSC in the temperature range of -40 to +220 °C were unsuccessful. The T g of polymers obtained by the thermally initiated cationic polymerization of epoxynorbornane was reported to be 72-80 o C. 14 Since polymerization of monomer V would result in cross-linked polymer with essentially infinite molecular weight, its T g would be expected to be higher than that for the linear polymer obtained from the polymerization of 2,3-epoxynorbornane. Indeed, for monomer V, a T g of 117 o C was measured.…”

Section: Ft-rtir Polymerization Studiesmentioning

confidence: 99%

See 1 more Smart Citation

Novel Epoxynorbornane Monomers. 2. Cationic Photopolymerization

Crivello

Narayan

1996

Macromolecules

View full text Add to dashboard Cite

The reactivity of a novel series of mono-, di-, and multifunctional monomers bearing the epoxynorbornane group in photoinduced cationic polymerization was determined using Fourier transform real-time infrared spectroscopy and differential scanning photocalorimetry. Comparisons were made between the monomers of this investigation containing the epoxynorbornane group with monomers of similar structure bearing epoxycyclohexane groups. Although the cationic polymerizations of the epoxynorborane functional monomers are rapid they, are slower than the aforementioned epoxycyclohexane analogues. This was attributed mainly to steric hindrance effects.

show abstract

Section: Resultsmentioning

confidence: 98%

Section: Ft-rtir Polymerization Studiesmentioning

confidence: 99%

Novel Epoxynorbornane Monomers. 2. Cationic Photopolymerization

Crivello

Narayan

1996

Macromolecules

View full text Add to dashboard Cite

show abstract

Ionic polymerization of 1,2‐butylene oxide: GPC, NMR, and IR characterization of the reaction products

Malhotra

Leborgne

Blanchard

1978

J. Polym. Sci. Polym. Chem. Ed.

View full text Add to dashboard Cite

The triphenylmethyl hexafluoroarsenate‐initiated cationic polymerization of 1,2‐butylene oxide in dichloroethane between −25 and +25°C and its sodium‐initiated anionic polymerization in bulk at 20°C have been carried out. Gel permeation chromatography (GPC) molecular weight distribution curves of the reaction products are multinodal. Nuclear magnetic resonance (NMR) and infrared (IR) analyses show that the cationically prepared polymers are composed of cyclic oligomers and linear high‐molecular‐weight products, while the anionically prepared polymers contain only linear products some of which include double bonds. NMR analyses further reveal that the cationically prepared polymers consist of monomer repeat units, while the anionically prepared polymers are essentially made of side products originating from the reaction of 1,2‐butylene oxide with the sodium mirror used as the anionic initiator.

show abstract