Abstract
It is a well-established fact that rubber accelerator is essential to provide solution in different sectors. However, there is a reversal process which can reduce the material performance. Sulfur accelerators donors and organic peroxides have been presented as a solution to the problem. The methodology development that can separate or characterize those components is a challenge and still allows gaps, explained by the application of conventional technique to reach this goal. This study aimed at contributing to the use of off-line coupling of thin layer chromatography (TLC)/infrared spectroscopy (IR) by Universal Attenuated Total Reflection (UATR) for analysis of N-cyclohexyl-2-benzotiazolsulfenamide (CBS), tetraethylthiuram disulfide (TMTD) and dicumyl peroxide (DCP), in natural poly-cis-isoprene (NR) formulations, containing naphthenic oil. The best results were obtained for the plasticizer and DCP, in formulations that had a greater proportion of these compounds. The separation of CBS and TMTD was made with less effectiveness, due to bands overlapping.
Highlights
The competitive industrial environment has demanded of in vulcanization
The extracts were analyzed by Universal Attenuated Total Reflection (UATR) as casting films, to avoid the appearance of KBr moisture bands around 3300 and 1640 cm-1, as a result of solid sample pellets preparation, for transmission analysis, that could interfere on the observation of NH bands of CBS accelerator
There is overlapping, in other regions, of naphthenic plasticizer bands, that have aliphatic CH groups, which absorb at 3000-2900, 1460-1400 and 700-750, and which is in greater proportion, relative to the formulation additives;
Summary
Companies have embraced some strategies to accomplish that specific objective and knowing better their own product substantially is one of them Does this route lead to better process variable evaluation, and it improves the employment of technology. Acknowledge the accelerators and vulcanizing agent of a formulation is paramount for new polymers development Does it aid in reducing process costs, and it increases the solution spectrum for industry. The polymers when the polysulfide bond breaks causing reduction of crosslink density, changing the distribution of the bonds types and modification in main chain structure. These facts lead to reduced article performance
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