Please use this identifier to cite or link to this item:
標題: Flame-retardant epoxy resins with high glass-transition temperatures. II. Using a novel hexafunctional curing a agent: 9,10-dihydro-9-oxa-10-phosphaphenanthrene 10-yl-tris(4-aminophenyl) methane
作者: Lin, C.H.
Cai, S.X.
關鍵字: dicyclopentadiene epoxy (hp7200)
diglycidyl ether of bisphenol A
9,10-dihydro-9-oxa-10-phosphaphenanthrene 10-oxide (dopo)
dielectric properties
flame retardancy
glass transition
pararosaniline chloride
phosphorus-containing polymers
condensation polymers
containing diamine
phosphine oxide
期刊/報告no:: Journal of Polymer Science Part a-Polymer Chemistry, Volume 43, Issue 23, Page(s) 5971-5986.
摘要: We synthesized a novel phosphorus-containing triamine [9,10-dihydro-9-oxa-10-phosphaphenanthrene 10-yl-tris(4-aminophenyl) methane (dopo-ta)] from the nucleophilic addition of 9,10-dihydro-9-oxa-10-phosphaphenalithrene 10-oxide and pararosaniline chloride, using triethylamine as an acid receiver. We confirmed the structure of dopo-ta by IR, mass, and NMR spectra and elemental analysis. dopo-ta served as a curing agent for diglycidyl ether of bisphenol A (DGEBA) and dicyclopentadiene epoxy (hp7200). Properties such as the glass-transition temperature (T-g), thermal decomposition temperature, flame retardancy, moisture absorption, and dielectric properties of the cured epoxy resins were evaluated. The T-g's of cured DGEBA/dopo-ta and hp7200/dopo-ta were 171 and 190 degrees C, respectively. This high T, phenomenon is rarely seen in the literature after the introduction of a flame-retardant element. The flame retardancy increased with the phosphorus content, and a UL-94 V-0 grade was achieved with a phosphorus content of 1.80 wt % for DGEBA/dopo-ta/diamino diphenylmethane (DDM) systems and 1.46 wt % for hp7200/dopo-ta/DDM systems. The dielectric constants for DGEBA/dopo-ta and hp7200/dopo-ta were 2.91 and 2.82, respectively, implying that the dopo-ta curing systems exhibited low dielectric properties. (c) 2005 Wiley Periodicals, Inc.
ISSN: 0887-624X
Appears in Collections:化學工程學系所



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.