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Title: Development and characterization of mesoporous terpolyimide nanocomposites with low dielectric constant
Researcher: Revathi Purushothaman
Guide(s): Easwaramoorthy D
Keywords: Dielectric constant
Mesoporous terpolyimide nanocomposites
Upload Date: 18-Jul-2013
University: Anna University
Completed Date: 01/06/2011
Abstract: Polyimides are a sophisticated family of materials, which cover an exhaustive range of high performance polymers. They find applications in highly technical end use fields from aerospace to microelectronics. Their strength and resistance to heat and chemicals are so great that these materials often replace glass and metals such as steel, in many demanding industrial applications. The scope of the present investigation was to synthesize terpolyimides with low dielectric constant without comprising thermal and mechanical properties. In this context, in the present study two different systems of terpolyimides were synthesized. The first system of terpolyimides was synthesized by combining dianhydrides such as 3,3 ,4,4 -biphenyl dianhydride (BPDA), 3,3 ,4,4 -benzophenonetetracaboxylic dianhydride (BTDA) and 3,3 ,4,4 -oxydiphthalicdianhydride (ODPA) with a diamine 4,4 -oxydianiline (ODA). The second system of terpolyimides was synthesized by combining BPDA, BTDA and 4,4 -(hexafluoroisopropylidene) diphthalicanhydride (6FDA) with ODA. Their hompolyimides and copolyimides were also synthesized for comparison. The first system of terpolyimides showed enhanced thermal stability, high tensile strength and tensile modulus compared to the second system of terpolyimides. The dielectric constants of the former were also higher than the latter. Though the second system of terpolyimides showed low dielectric constant, their thermal and mechanical properties were poor. As a result of functionalization their surface areas were also reduced. As the pore diameter of APTS-KIT-6 was larger than APTS-SBA-15, it could trap more air in it and further reduce dielectric constant.
Pagination: xxiv, 169p.
Appears in Departments:Faculty of Technology

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01_title.pdfAttached File50.58 kBAdobe PDFView/Open
02_certificates.pdf850.54 kBAdobe PDFView/Open
03_abstract.pdf26.62 kBAdobe PDFView/Open
04_acknowledgement.pdf412.76 kBAdobe PDFView/Open
05_contents.pdf67.88 kBAdobe PDFView/Open
06_chapter 1.pdf1.15 MBAdobe PDFView/Open
07_chapter 2.pdf198.06 kBAdobe PDFView/Open
08_chapter 3.pdf4.83 MBAdobe PDFView/Open
09_chapter 4.pdf2.72 MBAdobe PDFView/Open
10_chapter 5.pdf121.37 kBAdobe PDFView/Open
11_chapter 6.pdf1.31 MBAdobe PDFView/Open
12_chapter 7.pdf6.23 MBAdobe PDFView/Open
13_chapter 8.pdf47.32 kBAdobe PDFView/Open
14_referneces.pdf64.89 kBAdobe PDFView/Open
15_publications.pdf19.22 kBAdobe PDFView/Open
16_vitae.pdf14.13 kBAdobe PDFView/Open

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