Synergism of novel thiuram disulfide and dibenzothiazyl disulfide in the vulcanization of natural rubber: curing, mechanical and aging resistance properties

International Journal of Industrial Chemistry

دوره 5، شماره 1، خرداد 2014، صفحه 60-70

نوع مقاله: research article

شناسه دیجیتال (DOI): https://doi.org/10.1007/s40090-014-0008-6

نویسندگان

Md. Najib Alam؛ Swapan Kumar Mandal؛ Kumarjyoti Roy؛ Subhas Chandra Debnath^*

Department of Chemistry, University of Kalyani, Nadia, Kalyani, 741235, WB, India

چکیده

Introduction
Various combinations of synthesized thiuram disulfides (TD), namely Bis (N-phenyl piperazine) thiuram disulfide (PPTD) and Bis (N-ethyl piperazine) thiuram disulfide (EPTD) with mercapto benzothiazole disulfide (MBTS) are studied in natural rubber (NR) vulcanization. At the same time, we also revised the TD-MBTS binary accelerator on the carbon black-filled NR system. An evaluation is prepared between the synthesized safe thiuram disulfides with the unsafe tetra methyl thiuram disulfide (TMTD) in the light of mechanical and aging resistance behavior to introduce non-carcinogenic rubber additives to vulcanization of rubber.
Results
Synthesized safe amine-based thiuram disulfides in combination with MBTS display strong synergism in the gum vulcanization. Higher concentration of thiuram disulfide in presence of MBTS (6:3 mM ratio) shows better results with respect to cure and physical properties.
Conclusions
In the specific concentration of 9 mM per hundred gram of rubber (6:3 mM ratio of TD to MBTS), however, PPTD-MBTS accelerated filled vulcanizates show utmost aging resistance behavior, but EPTD-MBTS accelerated filled stock spectacles show superior aging as well as mechanical properties as compared to that of TMTD-MBTS accelerated system.

کلیدواژه‌ها

Rubber؛ Accelerator؛ Vulcanization؛ Crosslinking؛ Carbon black؛ Mechanical properties؛ Aging