Show/Hide Menu
Hide/Show Apps
anonymousUser
Logout
Türkçe
Türkçe
Search
Search
Login
Login
OpenMETU
OpenMETU
About
About
Açık Bilim Politikası
Açık Bilim Politikası
Frequently Asked Questions
Frequently Asked Questions
Browse
Browse
Communities & Collections
Communities & Collections
By Issue Date
By Issue Date
Authors
Authors
Titles
Titles
Subjects
Subjects
Synthesis and characterization of high temperature resistant bismaleimide based resins and their composites
Download
index.pdf
Date
2010
Author
Günalp, Süreyya Esin
Metadata
Show full item record
Bismaleimide resins are important in aerospace applications as matrix component of composite materials due to their high thermal and mechanical properties. 4,4’-bismaleimidodiphenylmethane (BMI) which is the most widely used bismaleimide, was synthesized starting from maleic anhydride and 4,4’-diaminodiphenylmethane (MDA). N,N’-diallylaminodiphenyl methane (ADM), N,N’-diallylaminodiphenyl sulfone (ADS) and N,N’-diallyl p-phenyl diamine (PDA) were synthesized by allylating primary aromatic diamines. Nine different prepolymers with 1:1, 1.5:1 and 2:1 molar ratios of BMI/diallyl compound were prepared and cured. The effect of increase in BMI ratio on thermal properties of the resin systems were investigated via Differential Scanning Calorimetry (DSC) and Thermal Gravimetric Analyzer (TGA). DSC results showed that the curing temperature of the resins increased due to the increase in BMI ratio in the resins. Thermal gravimetric analysis showed that incorporation of BMI monomer improved the thermal stability of the resins. BMI/ADM resin system showed better thermal stability compared to BMI/ADS and BMI/PDA resins. Processing characteristics of resins having 1:1 and 1.5:1 mole ratio of BMI/ADM were investigated by viscosity measurements and these resins were found to be suitable for composite production with Resin Transfer Molding (RTM). Composites were manufactured by RTM technique using two different mole ratios of BMI/ADM resins as matrix component. The effect of different matrix composition on thermal and mechanical properties of the composites were investigated. The concept of this thesis work was arised from the requirements of some projects carried out in Tübitak-SAGE. Keywords: Bismaleimide resins, composite, thermal properties, resin transfer molding.
Subject Keywords
Chemistry.
,
QD Polymers, Macromolecules 380-388
URI
http://etd.lib.metu.edu.tr/upload/2/12612058/index.pdf
https://hdl.handle.net/11511/19665
Collections
Graduate School of Natural and Applied Sciences, Theses
