In 2019,Journal of Metals, Materials and Minerals included an article by Worlee, Anuwat; Saiwari, Sitisaiyidah; Dierkes, Wilma; Sarkawi, Siti Salina; Nakason, Charoen. Safety of 1,2-Diphenyldisulfane. The article was titled 《Influence of filler network on thermo-chemical de-vulcanization efficiency of carbon black filled natural rubber》. The information in the text is summarized as follows:
Carbon black is often used as the reinforcing filler in tires since it plays an important role in improvement of tires mech. properties such as abrasion, stiffness, modulus and fatigue life. In this study, natural rubber (NR) filled with various loadings of carbon black was prepared Then, the NR vulcanizates were de-vulcanized via thermo-chem. method using di-Ph disulfide as de-vulcanization aid. The de-vulcanization efficiency was analyzed by relationship between sol fraction and crosslink d. of the de-vulcanizates. It is found that the de-vulcanization efficiency is influenced by filler loading. This is attributed to the degree of filler network formation in a rubber matrix which is depended on the filler loadings. In the unfilled de-vulcanizates the results showed that almost 100% of sol fraction and the crosslink d. reduced to almost zero are observed Adding carbon black results in a decrease of sol fraction and increase of crosslink densities. This is due to during de-vulcanization some occurred reactive radicals reacted with active site of carbon black surfaces in filler network to form gels of complex compound Hence, the de-vulcanization efficiency is lower with increasing carbon black loadings. After reading the article, we found that the author used 1,2-Diphenyldisulfane(cas: 882-33-7Safety of 1,2-Diphenyldisulfane)
1,2-Diphenyldisulfane(cas: 882-33-7) belongs to ethers. Ethers lack the hydroxyl groups of alcohols. Safety of 1,2-Diphenyldisulfane Without the strongly polarized O―H bond, ether molecules cannot engage in hydrogen bonding with each other.
Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem