سال انتشار: ۱۳۸۵

محل انتشار: ششمین همایش ملی دانشجویی مهندسی شیمی و پنجمین همایش ملی دانشجویی مهندسی نفت

تعداد صفحات: ۷

نویسنده(ها):

نعیمه بحری لاله –
شهرام مهران‌پور عطایی –
حسن عربی –

چکیده:

New naphthalene-ring containing ester diamines, as new monomers for the preparation of polyimides were
synthesized via two successive reactions. Nucleophilic reaction of 3,5-dinitrobenzoylchloride with 1-naphthol and 2-
naphthol in the presence of sodium hydroxide led to preparation of 1- and 2-(3,5-dinitrobenzoyloxy)naphthalene,
respectively. Next step was reduction of them byhydrazine hydrate/Pd-C to produce 1- and 2-(3,5-
diaminobenzoyloxy) naphthalene. All the prepared compounds were characterized by common spectroscopic
methods. These ester containing aromatic diamines with pendent naphthalene group were used to prepare soluble
polyimide copolymers via two different methods: catalyzed one-step high temperature polycondensation in m-cresol,
and two-step polycondensation in NMP and subsequent chemical dehydration. The obtained poly (ester-imide)s were
characterized and their properties were studied. One-step and two-step methods for the preparation of five-membered
ring polyimides were compared. Polymers prepared through one-step method showed higher yield and inherent
viscosities and therefore better physical properties.