Experimental Studies on Thermo-Mechanical Behavior of Ultrasonically Welded PC/ABS Polymer Blends

This research paper attempts to investigate the performance of blended PC/ABS joints using the ultrasonic material joining process. The key focus is on examining the thermal aspects during the joining of PC/ABS blends using ultrasonic welding and the subsequent mechanical testing to determine the st...

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Bibliographic Details
Published in:SILICON 2018-09, Vol.10 (5), p.1937-1948
Main Authors: Chinnadurai, T., Natesh, M., Vendan, S. Arungalai, Dinek, R., Kumar, K. A. Ramesh
Format: Article
Language:English
Subjects:
Chemistry
Chemistry and Materials Science
Environmental Chemistry
Inorganic Chemistry
Integrity
Joining
Lasers
Materials Science
Mechanical properties
Mechanical tests
Optical Devices
Optics
Original Paper
Photonics
Polymer blends
Polymer Sciences
Strain rate
Thermodynamic properties
Thermomechanical properties
Ultrasonic vibration
Ultrasonic welding
Welded joints
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Summary:This research paper attempts to investigate the performance of blended PC/ABS joints using the ultrasonic material joining process. The key focus is on examining the thermal aspects during the joining of PC/ABS blends using ultrasonic welding and the subsequent mechanical testing to determine the strength of the weldments. Thermal behavior of the blends during welding may govern or alter the mechanical properties and integrity of the joints. Hence, investigations on thermal characteristics involved in PC/ABS blends when subjected to high vibrational heat generated during the ultrasonic welding process is imperative. DSC is used to measure the glass transient temperature (T g ) after subjecting it to welding. Mass loss is calculated with TGA. TGA and DSC results indicate change in T g which are attributed to the molecular alignment occurring when the specimens are subjected to ultrasonic vibrations. Initially, two step mass losses occur that is contributed by ABS in which long single chains are associated and alters PC. SEM images reveal the absence in intermolecular compounds or impurities that tend to weaken weld joints. The diffusion of these molecules is uniform in the welded region. The amorphous nature enhances the integrity of weld joints. Molded part illustrates the higher strain rate in comparison with the welded specimens. The RSM model proposed is sufficient and has limited possibility for violating the independence or the assumption of constant variance.
ISSN:1876-990X
1876-9918
DOI:10.1007/s12633-017-9706-y