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Publikováno v:
Scopus-Elsevier
The natural rubber vulcanization mechanism has been studied using microwaves as a heating source. The influence of such heating system on the mechanism reaction has been elucidated. In order to simplify the study of this process, squalene has been us
Autor:
Tadahiro Ishii, Hiroyuki Kaidou, Katsunori Tsunoda, Asahiro Ahagon, Hirofumi Yajima, Makoto Kawakubo
Publikováno v:
Rubber Chemistry and Technology. 78:659-673
Effect of stretching on oxidative crosslinking of a carbon black filled IR vulcanizate at a normal temperature was studied by means of ESR and crosslink density measurements. Upon deformation, ESR intensity increased and crosslink density decreased,
Publikováno v:
Rubber Chemistry and Technology. 72:829-843
Fourier Transform Raman spectroscopy is employed to study the mechanism of reversion and the influence of the antireversion agent, 1,3 bis(citraconimidomethyl)benzene (BCI-MX) in squalene as well as in low molecular weight synthetic polyisoprene. The
Autor:
M. J. Van Der Merwe, M. H. S. Gradwell
Publikováno v:
Rubber Chemistry and Technology. 72:65-73
The mechanism of 2-t-butylbenzothiazole sulfenamide (TBBS) accelerated sulfur vulcanization of polyisoprene was investigated. Samples of compounded rubber were heated in a differential scanning calorimeter to preselected temperatures or degrees of vu
Publikováno v:
Digital.CSIC. Repositorio Institucional del CSIC
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12 páginas.
The scope of this paper is to review peroxide curing of diene elastomers. At high dicumyl peroxide loading and high curing temperature, changes in the crosslinking mechanisms were observed. Both Abstraction of allylic hydrogen and a
The scope of this paper is to review peroxide curing of diene elastomers. At high dicumyl peroxide loading and high curing temperature, changes in the crosslinking mechanisms were observed. Both Abstraction of allylic hydrogen and a
Publikováno v:
Rubber Chemistry and Technology. 52:773-780
When vulcanized natural rubbers are forced to extend in the glassy state, free radicals are produced by the scission of the primary chain. The amount of the free radicals increases with the strain. The tensile yield strain decreases with the decrease
Autor:
Robert W. Layer
Publikováno v:
Rubber Chemistry and Technology. 60:89-101
Thick natural rubber articles require long cure times in order for the central portion of the article to reach optimum cure. Even at relatively low cure temperatures, using conventional cure systems, the outer portions of the article become overcured
Publikováno v:
Rubber Chemistry and Technology. 53:915-935
The ESR spectra obtained from diene rubbers following mechanical deformation at cryogenic temperatures in a commercial purity nitrogen atmosphere are composite spectra arising from two or more radicals. The two radicals are thought to be an allyl rad
Autor:
Sadhan K. De, Rabindra Mukhopadhyay
Publikováno v:
Rubber Chemistry and Technology. 51:704-717
High cure temperature up to 180°C seems to have no significant effect on the mechanism of unaccelerated sulfur vulcanization of natural rubber. In the case of accelerated systems, the conventional ones undergo more desulfurization and decomposition
Publikováno v:
Rubber Chemistry and Technology. 48:41-49
This work reports a direct surface analysis of ozonization of vulcanized NR compounds by ATR. On ozonization of a vulcanized NR compound without clay filler or AO a degraded rubber layer, which contains ozonides and carbonyl compounds, is formed on t