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- W2007362221 abstract "The diamines 4,4′-[1,4(or 1,3)-phenylenebis(isopropylidene-1,4-phenyleneoxy)]dianiline (p-3 and m-3) were synthesized in two steps from the condensation of 4,4′-[1,4(or 1,3)-phenylenediisopropylidene]diphenol (p-1 and m-1) and p-chloronitrobenzene in the presence of K2CO3 in N,N-dimethylformamide (DMF), giving the corresponding bis(4-nitrophenoxy) compounds, followed by reduction with the hydrazine/Pd-C system. A series of aromatic polyamides, aliphatic-aromatic polyamides, and poly(amide-imide)s were prepared by the direct polycondensation of the diamines with aromatic or aliphatic dicarboxylic acids and phthalimide unit-bearing dicarboxylic acids in N-methyl-2-pyrrolidone (NMP) using triphenyl phosphite and pyridine as condensing agents. In addition, two series of polyamides were prepared from terephthalic acid or isophthalic acid and aromatic diamines with isopropylidene and/or ether linking groups between the phenylene units, and the structure-property relationships of these polyamides were studied. Almost all the resultant polymers were amorphous in nature and could be solution-cast into transparent, tough, and flexible films. Most of the polymers exhibited moderately high thermal stability. Thus, they are considered as new candidates for processable high-performance polymeric materials." @default.
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- W2007362221 date "1995-09-01" @default.
- W2007362221 modified "2023-10-16" @default.
- W2007362221 title "Synthesis and properties of polyamides and poly(amideimide)s based on 4,4′-[1,4(or 1,3)-phenylenebis(isopropylidene-1,4-phenyleneoxy)]dianiline" @default.
- W2007362221 doi "https://doi.org/10.1002/macp.1995.021960926" @default.
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