Soluble Polyimides and Copolyimides Based on Alicyclic Dianhydride Having Cyclohexene and Tetralin Moieties
نویسندگان
چکیده
منابع مشابه
Space Environmentally Stable Polyimides and Copolyimides
Polyimides with a unique combination of properties including low color in thin films, atomic oxygen (AO), ultra-violet (UV) radiation resistance, solubility in organic solvents in the imide form, high glass transition (Tg) temperatures and high thermal stability have been prepared and characterized. The polymers were prepared by reacting a novel aromatic diamine with aromatic dianhydrides in a ...
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The synthesis of aromatic poly(ether imide)s containing spirobifluorene units in the polymer backbone is described. 2,29-Bis(3,4-dicarboxyphenoxy)-9,99-spirobifluorene dianhydride, which was used as a new monomer, was synthesized with 2,29-dihydroxy-9,99-spirobifluorene as the starting material. In the spiro-segment, the rings of the connected bifluorene were orthogonally arranged. This bis(eth...
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It is a great challenge to develop semicrystalline polyimides exhibited significant recrystallization ability and fast crystallization kinetics from the melt. A series of semicrystalline polyimides based on 1,4-bis(3,4-dicarboxyphenoxy)benzene dianhydride (HQDPA) and different diamines, including 1,3-bis(4-aminophenoxy)benzene (TPER), 1,4-bis(4-aminophenoxy)benzene (TPEQ), 4,4′-oxydianiline (4,...
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on semihypergroups and hypergroups
in this thesis, first the notion of weak mutual associativity (w.m.a.) and the necessary and sufficient condition for a $(l,gamma)$-associated hypersemigroup $(h, ast)$ derived from some family of $lesssim$-preordered semigroups to be a hypergroup, are given. second, by proving the fact that the concrete categories, semihypergroups and hypergroups have not free objects we will introduce t...
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ژورنال
عنوان ژورنال: Polymer Journal
سال: 2005
ISSN: 0032-3896,1349-0540
DOI: 10.1295/polymj.37.126