Preparation of silica-supported 2-mercaptobenzimidazole
and its antioxidative behavior in styrene-butadiene rubber
Abstract
A novel type of rubber antioxidant, silica-supported 2-mercaptobenzimidazole (SiO2-s-MB), was prepared by reacting 2-mercaptobenzimidazole (MB) with chlorosilane-modified silica (m-SiO2). Raman spectroscopy, FT-IR, XPS and TGA confirmed that MB was chemically bonded onto the surfaces of silica particles. SEM observation showed that SiO2-s-MB was homogeneously dispersed in the styrenebutadiene rubber (SBR) matrix. Based on the measurement of oxidation induction time (OIT) of SBR/SiO2-s-MB and SBR/m-SiO2/MB composites containing equivalent antioxidant components, it was found that the antioxidative efficiency of SiO2-s-MB was superior to that of the corresponding low molecular MB. By determining the changes of tensile strength, elongation at break and crosslinking density of SBR composites during long-term accelerated aging, it was shown that the thermal oxidative stability of SBR/SiO2-s-MB composites was much higher than that of SBR/m-SiO2/MB composites. Furthermore, the color contamination, migration and volatility of SiO2-s-MB were lower than those of MB, indicating that SiO2-s-MB is environmentally friendly.
Reference
Zhong, B., Shi, Q., Jia, Z., Luo, Y., Chen, Y., & Jia, D. (2014). Preparation of silica-supported 2-mercaptobenzimidazole and its antioxidative behavior in styrene-butadiene rubber. Polymer Degradation and Stability, 110, 260-267.
Results and findings
-Silica-supported
2-mercaptobenzimidazole (SiO2-s-MB) as a novel type of rubber antioxidant
was prepared by reacting 2-mercaptobenzimidazole (MB) with
chlorosilane-modified silica (m-SiO2).
- MB was chemically bonded onto the surfaces of silica particles.
- SiO2-s-MB was homogeneously dispersed in the styrenebutadiene rubber (SBR) matrix.
- The antioxidative efficiency of SiO2-s-MB was superior to that of the corresponding low molecular MB.
- The thermal oxidative stability of SBR/SiO2-s-MB composites was much higher than that of SBR/m-SiO2/MB composites.
- The color contamination, migration and volatility of SiO2-s-MB were lower than those of MB, indicating that SiO2-s-MB is environmentally friendly.
Citations
- MB was chemically bonded onto the surfaces of silica particles.
- SiO2-s-MB was homogeneously dispersed in the styrenebutadiene rubber (SBR) matrix.
- The antioxidative efficiency of SiO2-s-MB was superior to that of the corresponding low molecular MB.
- The thermal oxidative stability of SBR/SiO2-s-MB composites was much higher than that of SBR/m-SiO2/MB composites.
- The color contamination, migration and volatility of SiO2-s-MB were lower than those of MB, indicating that SiO2-s-MB is environmentally friendly.
Citations
- According to Zhong et al. (2014), silica-supported
2-mercaptobenzimidazole (SiO2-s-MB) which was successfully prepared by
reacting 2-mercaptobenzimidazole (MB) with chlorosilane-modified silica
(m-SiO2) by chemical bonding onto the m-SiO2 surface was homogeneously
dispersed in the styrenebutadiene rubber (SBR) matrix.
- Zhong et al. (2014) reported that
silica-supported 2-mercaptobenzimidazole (SiO2-s-MB) had high antioxidative
efficiency and low color contamination, migration and volatility could be used as
an environmentally friendly rubber antioxidant to improve thermal oxidative
stability of styrenebutadiene rubber (SBR) composite.
Commentary on Friend' blogs:
ReplyDelete1# tossapolbu.blogspot.com
http://tossapolbu.blogspot.com/2015/01/assignment1-citation.html?showComment=1421839375431#c8438304059417046052
For reference, Page Number, you should give the last clause.
ReplyDeleteExample:
Zhong et al. (2014) reported that silica-supported 2-mercaptobenzimidazole (SiO2-s-MB) had high antioxidative efficiency and low color contamination, migration and volatility could be used as an environmentally friendly rubber antioxidant to improve thermal oxidative stability of styrenebutadiene rubber (SBR) composite (260-267).
Thank you :D
DeleteCommentary on Friend' blogs:
ReplyDelete2# Wattanapaphawong.blogspot.com
http://wattanapaphawong.blogspot.com/2015/01/assignment-1-citation-direct-synthesis.html?showComment=1421855133697#c6330865458863921971
Hi, Thanyaporn
ReplyDeleteI have a question for asking you.
"MB was chemically bonded onto the surfaces of silica particles"
I would like to know what type of chemical bond between MB and surfaces of silica particles.
THX :')
:D Thanks for your Question!!
DeleteSilica particle in this clause is mean chlorosilane-modified silica (m-SiO2) because MB cannot directly react with silica particle. Thus, chlorine group (-Cl) on the surface of m-SiO2 can chemical bonds with the thiol groups of MB. Actually, I don't know what this bond call but it is the bond between chlorine group and thiol group.
I hope this answer will be useful to you!!!
Good job! This is some hard stuff, but you're on the right track. The one thing I would look at is relative clauses and joining different clauses.
ReplyDelete"which was successfully prepared by reacting 2-mercaptobenzimidazole (MB) with chlorosilane-modified silica (m-SiO2) by chemical bonding onto the m-SiO2 surface"
This seems like it should part of its own clause?
:D Thank you for your suggestion ka Ajarn!!!
DeleteI have already revised it as sentences below.
According to Zhong et al. (2014), silica-supported 2-mercaptobenzimidazole (SiO2-s-MB) was homogeneously dispersed in the styrenebutadiene rubber (SBR) matrix. It was successfully prepared by reacting 2-mercaptobenzimidazole (MB) with chlorosilane-modified silica (m-SiO2).
Dear Fai
ReplyDeletesame comment with Khun Punya.
How condition do we know to write the page reference ka?