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- W2018291878 abstract "Hyperbranched polyamides with different degree of branchings (DBs) were prepared by different polycondensation conditions from an ABB′ type monomer, 4-(2,4-diaminophenoxy)benzoic acid. Polyamide (PA1) with multi-amino groups prepared in the presence of (2,3-dihydro-2-thioxo-3-benzoxazolyl) phosphonic acid diphenyl ester (DBOP) and triethylamine as condensing agents at room temperature had lower DB of 0.1. Polyamide (PA2) with multi-amino groups prepared in the presence of triphenylphosphite and pyridine as condensing agent at 100 °C had higher DB of 0.2. The free amino groups of both polyamides were modified by acetyl chloride, benzoyl chloride and phthalic anhydride, respectively, to give corresponding modified polyamides. The solubility and thermal properties were not influenced by the different DBs but were influenced by the end groups. Strong films were prepared from polyamides with lower DBs and polyamides with amino groups." @default.
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- W2018291878 date "2004-10-01" @default.
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- W2018291878 title "Syntheses and Properties of Different Degree of Branching Polyamides Derived from an ABB′ Type Monomer, 4-(2,4-Diaminophenoxy) Benzoic Acid" @default.
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