Zobrazeno 1 - 10
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pro vyhledávání: '"D. C. Pepper"'
Autor:
D. C. Pepper
Publikováno v:
Journal of Polymer Science: Polymer Symposia. 56:39-46
This paper summarizes results and conclusions from an extensive study by stopped-flow methods of the rapid nonstationary phase of the polymerization by HClO4 in CH2Cl2 of styrene and some styrene derivatives. With styrene, this precursor reaction is
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a3e640d204453de2fbbbf387782dbdae
https://doi.org/10.1002/polc.5070560106
https://doi.org/10.1002/polc.5070560106
Autor:
D. C. Pepper
Publikováno v:
Makromolekulare Chemie. Macromolecular Symposia. 60:267-277
The lecture reviews recent studies on vinyl and vinylidene compounds, chiefly alkyl cyanoacrylates. It emphasizes the kinetics, especially the distinctive SINT (slow-initiation-no-termination) pattern, and the composite mechanism of initiation by ter
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b4a7b760170329e259d858f36d05ff1c
https://doi.org/10.1002/masy.19920600124
https://doi.org/10.1002/masy.19920600124
Autor:
D. C. Pepper, P. D. Carr, Karen J. Edwards, P. J. Barlow, C. Ritherdon, J. D. Barton, D. L. Ollis
Publikováno v:
Journal of Applied Crystallography. 29:469-470
Modifications are described that eliminate ice build-up during data collection from cryo-cooled protein crystals using an RAXIS IIC imaging-plate system and its associated cool nitrogen gas stream apparatus (both supplied by Molecular Structure Corpo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0b0abf436f0b849947d64368b0ce7aa8
https://doi.org/10.1107/s0021889895016347
https://doi.org/10.1107/s0021889895016347
Autor:
D. C. Pepper, J. P. Lorimer
Publikováno v:
Proceedings of the Royal Society of London. A. Mathematical and Physical Sciences. 351:551-568
The non-stationary precursor reaction (stage I) in the polymerization of styrene by perchloric acid in methylene chloride has been examined, by stopped-flow methods over the range 0 to –80 °C. At all temperatures there is evidence of a transient,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a317eef2a318b9377bb7a7428c4b778b
https://doi.org/10.1098/rspa.1976.0156
https://doi.org/10.1098/rspa.1976.0156
Autor:
D C Pepper
Publikováno v:
Polymer Journal. 12:629-637
The paper reviews work in the author’s laboratory on the polymerization of alkyl cyanoacrylates, chiefly the butyl ester, in THF, by organic bases, phosphines and amines. It presents evidence that the bases initiate by addition, thus forming zwitte
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ea0eb55da47041ffa97d6f0256d66097
https://doi.org/10.1295/polymj.12.629
https://doi.org/10.1295/polymj.12.629
Autor:
D. C. Pepper
Publikováno v:
Journal of Polymer Science: Polymer Symposia. 50:51-69
Results are reviewed on cationic polymerizations initiated by γ-rays, by carbocation salts, and by strong acids, especially HClO4, with the conclusion that in no case are all criteria for true living polymerization satisfied. Detailed information is
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0b08ea10c071a114752e1e72bdb35cb5
https://doi.org/10.1002/polc.5070500106
https://doi.org/10.1002/polc.5070500106
Autor:
D. H. Jenkinson, D. C. Pepper
Publikováno v:
Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences. 263:82-88
Alcohols, nitromethane and triphenyl methyl compounds are shown to cause a large depression of molecular weight and yield in the cationic polymerization of styrene by sulphuric acid at 25°C. Ether, acetone and iso propyl benzene have a weaker effe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f539e90799dde39c2348fda24751052d
https://doi.org/10.1098/rspa.1961.0147
https://doi.org/10.1098/rspa.1961.0147
Autor:
D. C. Pepper, P. J. Reilly
Publikováno v:
Journal of Polymer Science. 58:639-647
Perchloric acid initiates reproducible polymerization of styrene (unaffected by traces of water) in ethylene dichloride and mixtures with carbon tetrachloride over the temperature range 25–30°C. The rate of polymerization is accurately first order
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2a9c5b77341e97614c3781b629fdbc58
https://doi.org/10.1002/pol.1962.1205816639
https://doi.org/10.1002/pol.1962.1205816639
Autor:
M. J. Hayes, D. C. Pepper
Publikováno v:
Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences. 263:63-74
The polymerization has been studied in homogeneous solution over the temperature range 0 to 35°C. At the upper temperatures the reactions are very fast; over the whole temperature range they are incomplete, giving limited yields of polymer which dep
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7bd89645771ddd2c56c41805a60e0e82
https://doi.org/10.1098/rspa.1961.0145
https://doi.org/10.1098/rspa.1961.0145
Autor:
D. C. Pepper, G. R. Brown
Publikováno v:
J. Chem. Soc.. :5930-5933
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::31622e61b67455be2baa74d40c4d95e2
https://doi.org/10.1039/jr9630005930
https://doi.org/10.1039/jr9630005930