College of Engineering and Polymer Science

Date of Last Revision

2023-05-05 06:29:49


Chemical Engineering

Honors Course


Number of Credits


Degree Name

Bachelor of Science

Date of Expected Graduation

Spring 2022


Elastomers without cross-linking agents or fillers do not have the necessary properties for practical applications in the rubber industry. Elastomers must be reinforced with fillers and/or cross-linking agents to achieve the needs of physical and mechanical properties for commercial products. Sodium octyl 6-mercaptohexyl phosphate (SOMP) and sodium ethyl (6-mercaptohexyl) phosphate (SEMP) were used to investigate the influence of a reactive ionic surfactant and its influence on the physical properties of peroxide crosslinked styrene butadiene rubber (SBR). SEMP and SOMP were both found to be able to be grafted successfully on to the SBR chains within the rubber using extraction testing and IR spectra analysis. The two surfactants also improved mechanical strength properties of SBR when mixed at various concentrations using tensile testing. More research needs to be pursued in this area to find the optimum concentration of each surfactant while mixed in rubber. Blends of these two surfactants could also be considered. Other ionic compounds can be investigated in hopes of better physical crosslinking and ease of use small scale and eventually large scale.

Research Sponsor

Dr. Li Jia

First Reader

Nathan Schmitz

Second Reader

Dr. Kevin Cavicchi

Honors Faculty Advisor

Dr. Donald Visco



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