KHW: Rheology of Thermosets

KnowHow Webinar: Rheology of Thermosets
Speaker: Dr. Raj Ganesh Jegadeesan
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Natural rubber is among the most important elastomers used in the manufacturing of products such as tires and conveyor belts. The polymer imparts many unique properties such as high tensile strength, tear strength, and resilience. This review will discuss natural rubber beginning with its biosynthesis, through to production, classification, and fundamental properties. Natural Rubber is obtained by tapping the side of the tree, Hevae brasiliensis. It is then processed and classified according to the quality and form under which it is shipped. Natural rubber is the preferred polymer in tire applications were high tear strength, tensile strength, and low hysteretic properties are required. It is used in wire coat or skim compounds, the shoulder wedge, and bead filler, and in tread compounds for winter passenger, medium truck and off-the-road tires. In many tire applications natural rubber is blended with other elastomers to achieve a required balance of properties. Sidewalls are typically blends of natural rubber and polybutadiene. Innerliner compounds, which are discussed in depth, can contain natural rubber in low amounts when blended with either chlorobutyl or bromobutyl rubber to achieve a balance of high impermeability, good adhesion, excellent flex-fatigue resistance, and good durability. The review will also cover natural rubber grader selection by application, interchangeability of grades and quality.
Speaker: Dr. Raj Ganesh J. has more than 15 years of experience in the field of polymeric materials characterization techniques and their processing techniques. His major expertise is in the study of structure-property relation of polymeric materials, processing relevant material characterization, material property correlation with the processing behaviours, processing related modelling & simulation techniques. As a qualified Application Expert, he has been providing technical support to various industrial customers from plastics, composites, rubber, and adhesive-related industries in the field of thermal, rheology, and thermophysical property measurements and supporting to resolving the processing related issue by the appropriate material testing solutions. He has conducted several applications-focused technical workshops at various locations in India as well as south-east Asia and, he has participated in various international conferences as a speaker. He has obtained his Master of Science (MS) in Polymer Engineering and Science and Ph.D. in Polymer Processing from the Montanuniversität Leoben (University of Leoben), Austria, Europe. Presently, he is working with TA Instruments, A Division of Waters LLC in India as an Applications Support Manager for the last 9 years. Education Summary: Ph.D. – Polymer Engineering & Science, Chair of Polymer Processing, Montanuniversität Leoben (University of Leoben), Austria; M.S. – Polymer Engineering & Science, Montanuniversität Leoben (University of Leben), Austria
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