Abstract
A polyimide fiber derived from benzophenone-3,3’,4,4’-tetracarboxylic acid dianhydride (BTDA), toluene diisocyanate (TDI) and 4,4’-methylenebis (phenyl isocyanate) (MDI) has been prepared by wet spinning. The chemical structure of the synthetic polyimide was characterized by Fourier transform infrared (FTIR) spectrometry. Also, field emission scanning electron microscope (FESEM) was used to observe the surface and cross-section morphologies of the resulting fibers. In addition, the obtained fibers possessed good thermal and thermo-oxidative stabilities with the initial degradation temperatures in air and nitrogen 499°C and 527°C, respectively. In order to obtain the optimized processing conditions, orthogonal design was applied. An optimal parameter combination was determined which leaded to maximum of tensile strength . As evidenced by variance analysis, the tensile strength of resultant fibers was influenced by negative draw ratio of spinneret remarkably making it the significant factor.
Publisher
Trans Tech Publications, Ltd.
Subject
Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics,General Materials Science
Cited by
1 articles.
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