|
1. |
THE OXIDATION OF PYROLYTIC DISTYRENE |
|
Canadian Journal of Research,
Volume 19b,
Issue 9,
1941,
Page 205-211
Léo Marion,
Preview
|
PDF (423KB)
|
|
摘要:
The pyrolysis of polystyrene to distyrene is accompanied by the formation of 1,3,5-triphenylbenzene. When pyrolytic distyrene is oxidized with limited quantities of potassium permanganate, a mixture of β-phenylpropiophenone, benzoic acid, and α-hydroxy-α,γ-diphenylbutyric acid is obtained. This substituted butyric acid can further be oxidized to β-phenylpropiophenone and when it is treated with hydrogen bromide and subsequently with sodium amalgam it gives rise to α,γ-dïphenylbutyrolactone. The relation of these results to the structure of the ethylenic component of pyrolytic distyrene is discussed.
ISSN:1923-4287
DOI:10.1139/cjr41b-027
出版商:NRC Research Press
年代:1941
数据来源: NRC
|
2. |
THE TERNARY ALLOY SYSTEM: ALUMINIUM–LEAD–SILVER |
|
Canadian Journal of Research,
Volume 19b,
Issue 9,
1941,
Page 212-230
A. N. Campbell,
L. Yaffe,
R. W. Ashley,
W. G. Wallace,
Preview
|
PDF (859KB)
|
|
摘要:
1. The area of partial miscibility for the ternary system, aluminium–lead–silver, has been determined by thermal and chemical analysis. It is found to extend from the binary system aluminium–lead to alloys containing a maximum of 85.58% silver and 4.71% lead by weight.2. The temperatures of separation of solid phase, bounding this area, have been found to fall at first with addition of silver to the system aluminium–lead, until a temperature of 548.5 °C. is reached. This is the temperature of solidification of the alloy that contains silver and aluminium in their eutectic proportions, plus saturation with lead. The temperature then increases to a maximum of about 736° in the alloy containing about 80% silver and 14% lead. This temperature maximum does not coincide with the summit of the mutual solubility curve but lies well to the right of it.3. No ternary compounds have been found.4. The ternary eutectic practically coincides with the binary eutectic of the system silver–lead.5. As far as can be determined by thermal analysis alone, it appears that there is no solid solution of lead in the α, β, or γ phases of the silver–aluminium system.6. The first peritectic line formed by the addition of lead to the high temperature peritectic point of the silver–aluminium system intersects the partial miscibility curve at 7.90% Al, 7.60% Pb, and 84.50% Ag. The temperature drops from 779.0° to 727.0°.7. The second peritectic line intersects the partial miscibility curve at 10.30% Al, 4.10% Pb, and 85.60% Ag. The temperature drops from 729.0° to 708.0°.8. If the partial miscibility curve had not intervened, the two lines would have intersected at 11.00% Al, 15.50% Pb, and 73.50% Ag.
ISSN:1923-4287
DOI:10.1139/cjr41b-028
出版商:NRC Research Press
年代:1941
数据来源: NRC
|
|