Journal of Chemical Engineering & Process Technology
Open Access
ISSN: 2157-7048
+44-77-2385-9429
ISSN: 2157-7048
+44-77-2385-9429
Milorad Ninkovic
University of Novi Sad, Serbia
Scientific Tracks Abstracts: J Chem Eng Process Technol
In this thesis, the modification of epoxy resins with thermoplastic polyurethanes of good elastic properties was performed. The influence of synthesized polyurethane based on the polycarbonate diol was studied (5,10 and 15% by weight in relation to epoxy), as well as the share of hard elastomeric segments (20, 25 and 30% by weight), was studied on the process of epoxy composite networking. The networking of epoxy hybrid materials was investigated using differential scanning calorimeter (DSC Q20 TA Instruments), at three different heating rates (5, 10 and 20oC/min). For the modification of epoxy resins, thermoplastic polyurethane films with a different share of hard segments (20, 25 and 30% by weight) were used. Synthesized polyurethane elastomers were added to the epoxy in various weight percentages relative to the resin (5, 10 and 15 wt%). To mix elastomers and epoxides, a composite mixture was mixed with a magnetic stirrer at 60oC for 2 hours. Then for better homogenization, the mixture is further stirred for 20 min in an ultrasonic bath. After that, the Jeffamine D-2000 cross-linker was added to the prepared binary component. The new reaction mixture was then placed for 1 hour in a vacuum dryer to remove the residual bubbles of CO2. In order to obtain films, the reaction mixture is poured onto polypropylene plates. After 24 hours at room temperature, the polypropylene plates were placed in the dryer, where the process of networking modified epoxy resins lasted an an additional 4 hours at 140oC.
Milorad Ninkovic is a chemical engineer, graduated 2013 at University of Novi Sad, department for polymer materials. Moved to Toronto in 2013. It was determined that with the increase in the share of hard segments of polyurethane, as well as the increase in the content of the added elastomer, the temperatures of the maximum reaction rate of the networking and activation energy of the reaction of the epoxy resin interaction decrease, which confirms the catalytic effect of thermoplastic polyurethanes based on the polycarbonate diol.
E-mail: ninkovic_milorad@yahoo.com