Thermal Degradation Studies of 2,2’-Dihydroxybiphenyl-Ethylenediamine-Formaldehyde Copolymer.

[摘要] Copolymer (2,2’-BPEDF) was synthesized with molar ratio 3:1:5 of monomer 2,2’-dihydroxybiphenyl (BP), ethylenediamine (ED) and formaldehyde (F) by condensation polymerization, in0 acidic medium and refluxing in oil bath at 120 C for 5 h. Composition and structure of organic copolymerhave been determined by elemental analysis and molecular weight determination by non-aqueous1 conductometric titration method. The UV-visible, FTIR and proton nuclear magnetic resonance ( H NMR)spectra were studied to elucidate the structure. The surface features and crystalline behaviour of thecopolymer was analysed by scanning electron microscope (SEM).Non isothermal thermogravimetricanalysis for determination of their mode decomposition and relative thermal stability, Energy ofactivation, frequency factor and order of reaction have been calculated by Sharp-Wentworth (SW) andFreeman-Carroll (FC) methods. Energy of activation determined by Sharp-Wentworth and Freeman- Carroll methods are in agreement with each other. The order of reaction is found to be 0.98.

[学科分类] 工程和技术（综合）

[关键词] Synthesis;Thermal;ethylenediamine;Kinetic parameter;Polycondensation;structure;composition;Thermal stability.