Characterization of polyurethane bonded dissimilar joints: Use of novel curing accelerators
Date21st Oct 2020
Time03:00 PM
Venue Through Google Meet Link: meet.google.com/eyw-fsdy-ecm
PAST EVENT
Details
The one-component PU adhesives are used in cars for joining steel frame to glass windshield, and in buses to join the aluminum to steel side skirts, steel to side glass windows, steel to GFRP front panel, and for bonding the windshields. The time taken for developing the initial strength, also known as handling strength, by these adhesives is relatively higher. Hence, longer fixation times are required after the joints’ installation to develop the handling strength without slipping. The accelerated curing of PU adhesives can reduce the fixation time significantly. In the first phase of Ph.D. work, accelerated curing of PU adhesives was planned to achieve through the addition of microcrystalline cellulose (MCC) and sawdust (SD) fillers. The effect of MCC and SD fillers on thermal degradation, hygrothermal aging, fatigue, and dynamic mechanical behavior of PU adhesives studied in the next phase of Ph.D. MCC and SD reinforced PU adhesive joints showed superior mechanical properties compared to unreinforced PU joints. The first part of the seminar will focus on a brief discussion about the PU adhesives curing, joint properties, and fillers’ effect on PU adhesive curing behavior. The durability of unreinforced and reinforced PU adhesive joints will be discussed in the second part of the seminar.
Speakers
Mr. Lakshmana Rao Bhagavathi
Department of Mechanical Engineering