Polymerization of N-Vinylcarbazole, N-Vinyl-5H-benzo[b]carbazole, and N-Vinyl-7H-benzo[c]carbazole

Okamoto, Ken‐ichi; Yamada, Masafumi; Itaya, Akira; Kimura, Tadashi; Kusabayashi, Shigekazu

doi:10.1021/ma60052a023

Cited by 65 publications

(45 citation statements)

References 4 publications

(5 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A very pure sample of VCz was also synthesized via N-fi-chloroethylcarbazole from rigorously-purified carbazole by the procedure described in the synthesis of 5-vinylbenzo[b]-carbazole. 16 The hole drift mobilities of the polymer samples prepared from these two samples of VCz were equal to each other. The PVCz(r) was prepared by polymerization of a 1.3 M benzene solution of purified VCz in the presence of 0.5 mol% AIBN in an evacuated sealed tube at 70°C for 5 h. The PVCz(c) was prepared by polymerization of a 0.074 or 0.…”

Section: Methodsmentioning

confidence: 95%

“…PVCz(c) has an isotactic sequence of 50% and PVCz(r), 25%. 16 PVCz(c) has more kinks at joints between isotactic and syndiotactic sequences. The Tg of PVCz(c) is higher than that of PVCz(r).…”

Section: Influence Of Tacticity On Hole Drift Mobilitymentioning

confidence: 99%

“…16 This difference in tacticity between PVCz(r) and PVCz(c) is reflected in the fluorescence spectra both in solution and in films. 17 • 18 Therefore, it is of interest to investigate how the difference in the tacticity of PVCz samples is reflected in hole drift mobility.…”

mentioning

confidence: 99%

See 2 more Smart Citations

Hole Transport in Amorphous Films of Poly(N-vinylcarbazole), Copolymers of N-Vinylcarbazole with Styrene, Polystyrene Molecularly-Doped with N-Isopropylcarbazole, and 1,3-Di(N-carbazolyl)propane

Itaya

Okamoto

Kusabayashi

1985

Polym J

Self Cite

View full text Add to dashboard Cite

ABSTRACT:The hole drift mobility in amorphous films of poly(N-vinylcarbazole) prepared by the radical and cationic polymerizations (abbreviated as PVCz(r) and PVCz(c), respectively), copolymers of N-vinylcarbazole with styrene (VCz-St), polystyrene molecularly-doped with Nisopropylcarbazole (IPCz-PSt). and 1,3-di(N-carbazolyl)propane (DCzP(a)) was investigated by the time-of-flight method. The electric field and temperature dependence of the mobility of all the materials fitted the Gill's empirical equation. The mobility of PVCz(r) was larger than that of PVCz(c) by a factor of ca.By heat-treatment at a temperature above the glass transition temperature, PVCz(r) film was crystallized and its mobility increased by a factor of ca. 5. The thermal-crystallization of PVCz(c) film was much more difficult than that of PVCz(r) film and the mobility of PVCz(c) film hardly changed with heat-treatment. These significant differences between PVCz(r) and PVCz(c) seem to be attributable to the difference in their tacticity. The mobility of PVCz(r) increased about twice as much with an increase in the sequence length of VCz chain from 20 to 200, while the mobility ofPVCz(c) was independent of it. This may be qualitatively explained by the existence of the chain-end vinyl group in PVCz(r). Under usual conditions (T=296 K, E= 1.6 x 10 5 V em -•). the mobility of low molecular-weight compounds (DCzP(a) and IPCz-PSt) was larger than that of polymeric compounds (PVCz and VCz-St). Using the results of a comparison of the values of parameters in the Gill's equation for these films, this was explained by a negative polymer effect due to the higher value of T0 .

show abstract

Section: Methodsmentioning

confidence: 95%

Section: Influence Of Tacticity On Hole Drift Mobilitymentioning

confidence: 99%

See 1 more Smart Citation

Hole Transport in Amorphous Films of Poly(N-vinylcarbazole), Copolymers of N-Vinylcarbazole with Styrene, Polystyrene Molecularly-Doped with N-Isopropylcarbazole, and 1,3-Di(N-carbazolyl)propane

Itaya

Okamoto

Kusabayashi

1985

Polym J

Self Cite

View full text Add to dashboard Cite

show abstract

“…15 When the PVK polymerization proceeds through the vinyl group, a colorless photoconducting PVK is generally formed. The formation of the conducting PVK with dark green color, in which the polymer chain is formed exclusively by bonds between benzene rings, is possible.…”

Section: Introductionmentioning

confidence: 99%

“…The formation of the conducting PVK with dark green color, in which the polymer chain is formed exclusively by bonds between benzene rings, is possible. [12][13][14][15][16] It has been reported that blending polymer with inorganic materials is considered as a powerful method to produce new materials called polymercomposites or filled polymers. However, due to the significant development in nanotechnologies in the recent years, nanoinorganic materials such as SiO2, Al2O3 and TiO 2 have brought much attention to this research field.…”

Section: Introductionmentioning

confidence: 99%

Morphology of the Conducting Poly-N-vinylcarbazole-coated Silica Gel Nanocomposites

Basavaraja¹,

Kim²,

Jo³

et al. 2010

Bulletin of the Korean Chemical Society

View full text Add to dashboard Cite

We report the effect of surface morphology on the conductivity of the poly-N-vinylcarbazole (PVK)/silica gel (SiO2) nanocomposites as a function of SiO2 weight percentage (%).The polymerization of PVK was initiated by a free-radical polymerization. The surface morphology of the prepared composite shows the incorporation of SiO2 in the prepared PVK-SiO2 (PS) nanocomposites. The conductivity increased from 9.2 × 10 -5 S cm -1 to 9.6 × 10 -4 S cm -1 with the increase in the percentage of silica gel from 5 to 30%. The nanocomposites show a percolation behavior having a threshold value between 15 and 20%.

show abstract

Polyvinyl Compounds, Others

Hallensleben

2000

Ullmann's Encyclopedia of Industrial Chemistry

View full text Add to dashboard Cite

The article contains sections titled: 1. Poly(Vinyl Alcohol) 1.1. Structure and Crystallinity 1.2. Production 1.3. Properties 1.4. Uses, Toxicology, and Economic Aspects 2. Poly(Vinyl Acetals) 2.1. General Aspects 2.2. Poly(Vinyl Formal) 2.3. Poly(Vinyl Butyral) 2.4. Other Poly(Vinyl Acetals) 3. Poly(N‐Vinyllactams) and Poly(N‐Vinylamines) 3.1. Polyvinylpyrrolidone 3.2. Polymers of other N ‐Vinyllactams 3.3. Polyvinylamines

show abstract

Polymerization of N-Vinylcarbazole, N-Vinyl-5H-benzo[b]carbazole, and N-Vinyl-7H-benzo[c]carbazole

Cited by 65 publications

References 4 publications

Hole Transport in Amorphous Films of Poly(N-vinylcarbazole), Copolymers of N-Vinylcarbazole with Styrene, Polystyrene Molecularly-Doped with N-Isopropylcarbazole, and 1,3-Di(N-carbazolyl)propane

Hole Transport in Amorphous Films of Poly(N-vinylcarbazole), Copolymers of N-Vinylcarbazole with Styrene, Polystyrene Molecularly-Doped with N-Isopropylcarbazole, and 1,3-Di(N-carbazolyl)propane

Morphology of the Conducting Poly-N-vinylcarbazole-coated Silica Gel Nanocomposites

Polyvinyl Compounds, Others

Contact Info

Product

Resources

About