This study is to explore and analyse any related processes being used in the synthesis of microporous Polyurethanes (PUs) composites foams. The microporous interconnected PUs foams were prepared in a cylindrical shape with 100 mm and 28 mm diameter in respect to low (0-1500Hz) and high (1500-6000Hz) frequency absorption level as well as the sound absorption coefficient (α). The comparative study and analysis is based on the α at low frequency absorption level correspond to the size of microporous structure or ratios of filler. The increasing of thickness foam composites will revealed the α at higher absorption frequency level.

Anika Zafiah Mohd Rus received her BSc (Hons) in Mechanical Engineering (Manufacturing) in 1998 and PhD in March 2007 from University of Warwick, United Kingdom in Polymer Chemistry and Engineering. At the present she’s an Associate Professor in the Department of Materials and Design Engineering, Faculty of Mechanical and Manufacturing Engineering, University Tun Hussein Onn Malaysia (UTHM) and Head (Principal Researcher) at Sustainable Polymer Engineering, Advanced Manufacturing and Materials Center (SPEN-AMMC). Her current research interests include synthesis and characterization of vegetable oils; with value-added conversion process of waste biomass for renewable composites feedstock. Other research interests are lightweight construction materials and renewable energy from natural resources. She has received many awards and recognition such as URIF Grant from UTP Innovation Competition in March 2017, Best Invention Award-Universities and Educational Institutions entitle "Recyclate Photoresists Plastic (Re-PLAS)" in ITEX 2016, Excellent Researcher and Vice Chancellor Incentive Award, Excellent Research and Innovation Awards Festival, 2014, University Tun Hussein Onn Malaysia (UTHM), Foreign Special Awards (Kinews) for product title “Bio-Degradable Renewable Polymer” at International Exposition of Research & Invention of Institutions of Higher Learning 2013 (PECIPTA 2013), Experimental Apparatus Order Of Merit and Green Invention Order Of Merit at the World Inventor Awards Festival 2013 by Korea Inventions News, Seoul, Korea, 2013. She also received “Woman Inventor of the Year” for product design of Eco-Smart Monomer Converter (Eco-SMOC), Gold Award for Catalytic Converter (C-C)n and recipients of “Sir Isaac Newton Scientific Awards of Excellence for 2012” by The World Forum Symposiums of Science, St Catherine’s College, Oxford, England in 2012, Foreign Special Awards, Double Gold (Natural Earth) and Gold Award for Biodegradable Renewable Polymer in 2011 and etc.