Seminar

Engineering Seminar Series 21_2010: Computer simulation of liquid crystalline polymeric fibres reinforcing polycarbonate composites

Dr Goh Kheng Lim, senior lecturer from School of Engineering, MUSC


Date: 2010-11-04
Time: 12:00 to 13:00
Venue: 9-5-04


Abstract

Injection-molded in situ anisotropic liquid crystalline polymeric (LCP) micro-fibres reinforcing polycarbonate (PC) composite are light-weight materials with ‘tailorable’ mechanical properties. This talk will discuss a novel fibre-recruitment (FR) computer model that we have developed recently for investigating the effects of compatibilization on the microstructure-property relationship in LCP-PC composites. By evaluating the mechanics of fibre recruitment, pull-out and rupture of LCP fibres and LCP-PC interfacial failure, the model yielded predictions implicating the multifunctional role of compatibilization addressing the enhanced stability of the LCP fibre against thermal relaxation, an increase in the interfacial adhesion and miscibility between the LCP and PC components, modulation of the polymer chain length of the fibres to produce fibres with high yield and rupture stresses, modulation of the crystallinity of the fibre to produce fibres that are highly flexible.

About the Speaker

Dr Kheng-Lim Goh is a Chartered Physicist and Scientist. His PhD degree (University of Aberdeen) was in the area of Bioengineering. He has worked as a research assistant for Prof. Malcolm Pope to study the biomechanics of occupational low back pain at the Liberty Work Safe Centre (Aberdeen, 2001-2) and as a post-doc to investigate the mechanisms of ageing in extracellular matrix (ECM) of connective tissues (Stirling & Cardiff University, 2002-4). In 2005, he moved to Singapore to take up a faculty position as an Assistant Professor at the School of Chemical & Biomedical Engineering, Nanyang Technological University. In 2009, he was appointed as a Senior Lecturer in Mechanical Engineering at Monash University Malaysia. His current research interests include basic and applied studies on fibre composites, particularly on the development of biocomposites for biomedical applications. Dr Goh is a member of the editorial boards of the Journal of Mechanics in Medicine and Biology and the Journal of Medical Imaging and Health Informatics.