Yusuf Yagci is a full professor of Chemistry at Istanbul Technical University, Turkey. He received his Ph.D. (1979) degree from Liverpool University (UK). He joined Istanbul Technical University in 1980 where he continued all his academic activities till now. . He has published over 600 original research papers and 48 book chapters, and is the inventor and co-inventor of 10 patents. He is the recipient of several awards including The Society of Polymer Science, Japan (SPSJ) International Award (2008), OIC Ministerial COMSTEC International Award (2010), OIC Science & Technology Award (2017), and Fellow of Royal Society of Chemistry (2017), Belgian Polymer Group International Award (2018), Japan Photopolymer Science and Technology Award (2018), Alexander von Humboldt Research Award (2018).
Presentation: New Approaches in Benzoxazine Chemistry for the Synthesis of Advanced Materials
Baris Kiskan1, Yusuf Yagci1, 1 Istanbul Technical University, Department of Chemistry, 34469, Maslak, Istanbul, Turkey
Benzoxazine-based phenolic thermosets offer low water absorption, high char yield, resistance against flame, high modulus, high strength, high glass transition temperatures, chemical resistance, long shelf life etc.  Hence, the field of benzoxazine chemistry has been significant advance during the last years. Many different benzoxazines were synthesized and used in high performance thermosetting applications. Indeed, this area is getting more active to meet the actual needs of the industry. Thus, increasing number of papers, patents has been published and the citation pool of this subject is growing rapidly.
Recently, researchers recognized the potency of benzoxazine chemistry to design new polymers that can be considered as advanced materials for unconventional uses. Several research papers have been accumulated about self-healing polybenzoxazines, porous benzoxazine polymers, smart coatings, batteries, electrochromic materials, shape memory polybenzoxazines and superhydrophobic surfaces.  Moreover, the reactive nature of benzoxazine monomers allowed researchers to combine polybenzoxazines with other polymers and compounds. For example, the reaction of elemental sulfur and benzoxazine is an emerging area since benzoxazines could be considered as monomers for inverse vulcanization process.  The curing of benzoxazine and inverse vulcanization take place simultaneously producing copolymer with high sulfur content. The appealing part of this strategy is its simplicity and low cost of the chemicals can be converted into advanced materials in one-pot and the curing temperatures of benzoxazines reduce depending on the sulfur content. As well known, curing of benzoxazines require high temperatures such as 250 °C and such temperatures can be considered as a drawback for these materials in term of energy consumption and processibility. Thus, reducing the cure temperatures are critical in benzoxazine chemistry. As a solution for the mentioned issue, we have applied various approaches to lower cure temperature successfully and different levels of success was observed for classical benzoxazines.  In this presentation an overview is presented about polybenzoxazines highlighting those recent advances for advanced applications ranging from self-healing materials, sulfur-benzoxazine chemistry and reducing cure temperatures of benzoxazines.
 N.N. Ghosh, B. Kiskan, Y. Yagci, Prog. Polym. Sci. 32 (2007) 1344-1391
 B. Kiskan, React. Funct. Polym. 129 (2018) 76-88
 M. Arslan, B.Kiskan, Y. Yagci, Macromolecules 49 (2016) 767-773
 A. Kocaarslan, B. Kiskan, Y. Yagci, Polymer 122 (2017) 340-346