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۱Thermally Stable Poly(ester amide)s Derived from Terephthalic Acid bis(carboxydiphenyl methyl)ester
اطلاعات انتشار: نهمین کنگره ملی مهندسی شیمی ایران، سال
تعداد صفحات: ۸
Terephthalic acid bis(carboxydiphenyl methyl)ester (TBE) as a new monomer for the preparation of polyamides was synthesized through the nucleophilic substitution reaction of benzilic acid with terephthaloyl chloride. This diester–diacid (TBE) was characterized using conventional spectroscopic methods. Polycondensation reactions of TBE with different aromatic and semi–aromatic diamines via Yamazaki method
resulted different poly(ester amide)s. All the polymers were characterized and their physical and thermal properties were studied.<\div>

۲Survey of Sulfonated Polyimide Membrane as a Good Candidate for Nafion Substitution
اطلاعات انتشار: اولین کنفرانس ملی هیدروژن و پیل سوختی، سال
تعداد صفحات: ۸
Among the different polymeric materials, sulfonated polyimides can be considered as a good candidate for nafion substitution in fuel cell membranes. Study show that modification of polyimides by introduction of aliphatic linkages in the structure of sulfo<\div>

۳Synthesis of New Sulfonated Copolyimides with Built in Ether and Oligo Ethylene Glycol Sequence
اطلاعات انتشار: ششمین کنگره بین المللی مهندسی شیمی، سال
تعداد صفحات: ۵
New sulfonated copolyimides with ether and oligo ethylene glycol sequence in back bone were synthesized by reaction of synthesized diamine 4,4'–bis(5–amino–1–naphtoxy)–benzhophenon–3,3΄–disulfonic acid(BANBPDS) in companion with two nonsulfonated diamines 4,4΄–oxydianiline (ODA) and 1,8–diamino–3,6–dioxaoctane (DADO) and reaction with 1,4,5,8–naphtalene tetracarboxylic dianhydride (NTDA). After characterization of the monomers and polymers with common methods the sulfonated polyimides were characterized for their viscosity, molecular weight, processability, solubility, and thermal stability. All the sulfonated polyimides had good thermal stability and exhibited a three–step degradation pattern while have good processability and solubility.<\div>
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