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Seminars»05.11.2015 - Dündar Yılmaz : From Simulations of High Performance Polymers to a Start-Up Company

05.11.2015 - Dündar Yılmaz : From Simulations of High Performance Polymers to a Start-Up Company

From Simulations of High Performance Polymers to a Start-Up Company

Dündar Yılmaz
Department of Electrical-Electronics Engineering, Zirve University, Gaziantep
05 November 2015, Thursday, 14:40
Cavid Erginsoy Seminar Room, Physics Department, 3rd floor

Abstract: It all started with TUBITAK funded project titled with “Theoretical Investigation of Mechanical Properties of Aromatic Poliamids”. This project funded under a program, which aims a jump-start to new researchers. I will discuss results of this project in the first part of my talk. Here is the abstract for this part:

Failure mechanisms of poly(p-phenylene terephthalamide (PPTA) under extreme tensile deformation has been studied using reactive potentials with molecular dynamics simulations. Amorphous PPTA systems with different molecular weights generated using an in-house developed amorphous builder. Tensile modulus of amorphous PPTA has been calculated as up to 6.7 GPa. Nitrogen and carbon vacancy defects were introduced to both crystalline and amorphous systems. The tensile modulus of defects-free crystalline PPTA calculated as 350 GPa. Introduction of 5% nitrogen vacancy defects reduced the tensile modulus to 197 GPa. To estimate fiber modulus, PPTA fiber considered to be composed of amorphous and crystalline phases. Rule of mixtures formula modified to incorporate influence of defects on tensile modulus. Histograms of various quantities such as bond lengths, bond angles and phenyl ring diameters were calculated at different strain levels. Tensile load was mostly accommodated through stretching of bonds between amide group and phenyl groups. Under extreme tensile deformation PPTA chains failed at these C-N bonds.

Since this project funded, my interest on polymers increased. In fact Gaziantep is a city where 80% polymer related industry is located. After observing opportunities arisen with the advance of 3D printers, we decided to establish a start-up company, which exploits capabilities of 3D printers: ADMACO ARGE A. S. ADMACO is an acronym for “Advanced Manufacturing/Materials Company”. It focuses on developing advanced filaments to be able to manufacture advanced materials. I am the co-founder of this company with a colleague and there are two investor companies with all equal shares. It is located in Gaziantep Teknopark. Ipekyolu Development Agency – A government agency which funds small businesses- awarded our company with a grant around 150 000 TL to build our initial infrastructure.

Reminder: Tea and cookies will be in the seminar room before the seminar.