Zobrazeno 1 - 10
of 140
pro vyhledávání: '"D.Ya. Toptygin"'
Publikováno v:
International Journal of Polymeric Materials. 13:187-194
In polymethylmethacrylate and cellulose acetate the kinetics of triplet cyclohexadienone carbenes decay by 77–135 K including a hydrogen atom transfer from C[sbnd]H bonds of macromolecules with the radical pair formation was examined. The kinetics
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ce3168675bf3e5abfc9965cd288fb453
https://doi.org/10.1080/00914039008039473
https://doi.org/10.1080/00914039008039473
Publikováno v:
Polymer Science U.S.S.R.. 17:629-634
The changes of the ageing properties of polycarbonate (PC) have been studied under conditions of free radical initiation (FRI). In a PC under stress the free radicals were found to be detrimental to ageing resistance; the deterioration was caused by
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3c37e20aad4d03eb4f645086e549a18f
https://doi.org/10.1016/0032-3950(75)90133-1
https://doi.org/10.1016/0032-3950(75)90133-1
Publikováno v:
Bulletin of the Academy of Sciences of the USSR Division of Chemical Science. 23:1910-1914
1. The conversion of naphthalene and perdeuteronaphthalene in cellulose triacetate is a complex photochemical free-radical process and proceeds with the participation of macroradicals. 2. Evidently the process is initiated by a singly-excited triplet
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::daadfcbc5dab8ca6f3f725531cf4ca40
https://doi.org/10.1007/bf00922786
https://doi.org/10.1007/bf00922786
Publikováno v:
Polymer Science U.S.S.R.. 16:557-566
The effect of the spectral composition of the light on the nature of the macroradicals formed has been studied by the EPR method at low temperatures, with orientated films of polycaproamide (PA). It is shown that on irradiation of PA with ultraviolet
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::91550699182f6aead2ffa9b4a89ceccf
https://doi.org/10.1016/0032-3950(74)90365-7
https://doi.org/10.1016/0032-3950(74)90365-7
Publikováno v:
Polymer Science U.S.S.R.. 17:348-355
The dependence of the length of induction period of polystyrene (PSt) oxidation on concentration was studied at 200°C using four inhibitors, namely Ionol, Neozon D, and the anti-oxidants 2246 and 4010 Na. These inhibitors, i.e. phenols and amines, w
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::424357ca6c85ce9320f790355c78562c
https://doi.org/10.1016/0032-3950(75)90505-5
https://doi.org/10.1016/0032-3950(75)90505-5
Publikováno v:
Polymer Science U.S.S.R.. 24:378-387
A comparative kinetic study has been made of the photoreduction of additions of ferric chloride and tetraethyl ammonium tetrachloroferrate in solid PMMA at 77 and 293 K under the action of light with λ =313, 365 and 390 nm. It is shown that the quan
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::66495e0fe8c365f03a19af54c3fe8dba
https://doi.org/10.1016/0032-3950(82)90185-x
https://doi.org/10.1016/0032-3950(82)90185-x
Publikováno v:
Polymer Science U.S.S.R.. 24:1407-1413
Two macroscopic stages of the benzoyl peroxide and dicyclohexylperoxy dicarbonate decomposition have been found to exist in polyamide. In one of the stages benzoyl peroxide (BP) conversion was not subject to the effects of an inhibitor or oxygen and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a768857f0560ccdeb2386fdb8b97bb1c
https://doi.org/10.1016/0032-3950(82)90416-6
https://doi.org/10.1016/0032-3950(82)90416-6
Publikováno v:
Polymer Science U.S.S.R.. 25:1504-1512
A study was made of kinetic regularities of thermal and photochemical decomposition of benzoyl peroxide in amorphous PS. Kinetics of consumption of peroxide and formation of carbon dioxide in the polymer do not correspond to kinetics observed in liqu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9c145be881f37ce560e18efa63b2ce22
https://doi.org/10.1016/0032-3950(83)90089-8
https://doi.org/10.1016/0032-3950(83)90089-8
Publikováno v:
Polymer Science U.S.S.R.. 17:1730-1737
ESR is used to study the photoconversions of the free ester group radicals of polymethylmethacrylate (PMM) which form in the polymer during the photo-reduction of added ferric chloride at low temperatures. An effective photo-dissociation of the ∼CH
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b1272892b929b0e9b4f7b5d3d4eea5c5
https://doi.org/10.1016/0032-3950(75)90177-x
https://doi.org/10.1016/0032-3950(75)90177-x
Publikováno v:
Polymer Science U.S.S.R.. 24:1176-1183
A study has been made of the role of the structuro-physical factors in the breakdown of loaded TAC specimens and impairment of their durability where degradation of the macromolecules is initiated by thermal decomposition of benzoyl peroxide. Aspects
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::72aa240a58a435f362b711fcb319c426
https://doi.org/10.1016/0032-3950(82)90221-0
https://doi.org/10.1016/0032-3950(82)90221-0