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Department of Chemistry, Jamia Millia Islamia (A Central University), India
*Corresponding author: Sharif Ahmad, Materials Research Laboratory, Department of Chemistry, Jamia Millia Islamia (A Central University) New, Delhi-110025, India
Submission: July 02, 2018; Published: July 19, 2018
ISSN 2637-8078Volume2 Issue3
Polyurethanes (PUs) are one of the most versatile and explored polymeric materials in which the urethane groups are the major repeating unit and can be synthesized by reacting di or polyisocyanates (hard segments) with di or polyols (soft segments) via catalyzed polymerization process [1]. A broad range of PU with variety of physical and mechanical properties can be tuned just by changing the ratio of soft and hard segments [2]. Thus, it consists of two phase structure in which the hard segments are embedded into the soft segments. Using different ratios of hard/soft segments, it can be fabricated according to their need of applications in rubber, fibers, films, paints, coatings, elastomers, foams, gels etc. [3] These many forms of PUs available to date are simple improvements of the invention of Dr. Otto Bayer and his coworkers in the 1930s [4]. The continuous improvements in the polyurethane made them a suitable and promising material for the incorporation in widespread applications. For the decades, it has been used in the field of biomedical due to their well-known properties such as good durability, high tensile strength, fatigue resistance, excellent biodegradability and biocompatibility [5].
Ph.D in Agriculture from Faculty of Agriculture, Tohoku University
Research Professor, PhD, Holistic Research Institute
Professor, Chief Doctor, Director of Department of Pediatric Surgery, Associate Director of Department of Surgery, Doctoral Supervisor Tongji hospital, Tongji medical college, Huazhong University of Science and Technology
Senior Research Engineer and Professor, Center for Refining and Petrochemicals, Research Institute, King Fahd University of Petroleum and Minerals (KFUPM), Dhahran, Saudi Arabia
Fellow of International Agency for Standards and Ratings (IASR), Edith Cowan University, Sarich Neuroscience Research Institute
Chancellor Emeritus / Professor Emeritus of Chemistry and Physics, University of Missouri–St. Louis
Ph.D in Science from the Federal University of Alagoas, UFAL, Brazil
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