Reactive processing and characterization of anhydride/hydroxyl and anhydride/epoxy functionalized blends

Bayram, Göknur


Synthesis of liquid crystalline copolyesters with low melting temperature for in situ composite applications
Erdoğan, Selahattin; Bayramlı, Erdal; Department of Polymer Science and Technology (2011)
The objective of this study is to synthesize nematic-thermotropic liquid crystalline polymers (LCP) and determine their possible application areas. In this context, thirty different LCP’s were synthesized and categorized with respect to their fiber formation capacity, melting temperature and mechanical properties. The basic chemical structure of synthesized LCP’s were composed of p-acetoxybenzoic acid (p-ABA), m-acetoxybenzoic acid (m-ABA), hydroquinone diacetate (HQDA), terephthalic acid (TPA) and isophtha...
Thermal characterization of phenol and bisphenol-A based polybenzoxazines
Bagherifam, Shahla; Hacaloğlu, Jale; Department of Polymer Science and Technology (2009)
Although, several researches on synthesis and characterization of benzoxazines and polybenzoxazines have appeared in the literature, detailed studies on thermal characterization are still limited. In this study, polymerization and thermal degradation mechanisms of benzoxazines were investigated via direct pyrolysis mass spectrometry. Benzoxazine monomers prepared by reactions of phenol or bisphenol- A with aniline or methyl amine were analyzed to investigate the effects of the structures of phenyl and amine...
Impact modified polyamide-organoclay nanocomposites
Işık, Işıl; Yılmazer, Ülkü; Department of Chemical Engineering (2007)
The effects of melt state compounding and addition order of ethylene-butyl acrylate-maleic anhydride (E-BA-MAH), ethylene-glycidyl methacrylate (E-GMA), ethylene-methyl acrylate-glycidyl methacrylate (E-MA-GMA) terpolymer and/or three types of organoclays (Cloisite® 15A, 25A and 30B) on morphology, thermal, mechanical and dynamic mechanical properties of polyamide-6 are investigated. XRD patterns show that the interlayer spacing for Cloisite® 15A remained unchanged; however it increased for the organoclays ...
Experimental characterizations of the response of nematic liquid crystal droplets upon adsorption of nanoparticles from aqueous media
Şengül, Selin; Büküşoğlu, Emre; Aydoğan, Nihal; Department of Chemical Engineering (2021-9-08)
Nematic liquid crystal (LC) droplets have been widely used for the detection of molecular species. In this study, we investigated the response of micrometer sized nematic LC droplets against the adsorption of nanoparticles from aqueous media. In the first part of this study, we synthesized ~100 nm-in-diameter silica nanoparticles and modified their surfaces to mediate either planar or homeotropic LC anchoring and a pH-dependent charge. Secondly, we carried out the adsorption of nanoparticles to the LC-aqueo...
Flame retardancy of polyamide compounds and micro/nano composites
Gündüz, Hüseyin Özgür; Kaynak, Cevdet; Department of Polymer Science and Technology (2009)
In the first part of this dissertation, glass fiber reinforced/unreinforced polyamide 6 (PA6) and polyamide 66 (PA66) were compounded with three different flame retardants, which were melamine cyanurate, red phosphorus and brominated epoxy with antimony trioxide, by using an industrial scale twin screw extruder. Then, to investigate flame retardancy of these specimens, UL-94, Limiting Oxygen Index (LOI) and Mass Loss Cone Calorimeter (MLC) tests were carried out. In addition to flammability tests, thermogra...
Citation Formats
G. Bayram, “Reactive processing and characterization of anhydride/hydroxyl and anhydride/epoxy functionalized blends,” Ph.D. - Doctoral Program, Middle East Technical University, 1999.