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Citation: YU Shi-Jun, GUO Hong, NIE Xin, LIAO Chun-Quan, LI Hong, LI Shi-Feng. Synthesis of Hyperbranched Aromatic Polyamides[J]. Chinese Journal of Applied Chemistry, ;2006, 23(11): 1204-1208. shu

Synthesis of Hyperbranched Aromatic Polyamides

1.
College of Chemistry and Chemical Engineering, Liaoning Normal University, Dalian 116029

Corresponding author: YU Shi-Jun,
Received Date: 28 November 2005
Available Online: 1 February 2006
Fund Project: 国家自然科学基金资助项目(20173025,20573049) (20173025,20573049)

A new AB₂monomer,2-(3,5-diaminobenzamido)benzoic acid,was synthesized from 3,5-dinitrobenzoyl chloride and o-aminobenzoic acid.A hyperbranched aromatic polyamide(a) was prepared from this new monomer by self-polycondensation,and seven hyperbranched polymers(b~h) with various end-groups were also prepared by end-capping reactions with acid chlorides.These polymers were characterized by(FT-IR),¹H NMR,GPC and DSC.Through the modification of the end-groups,the solubilities of the polymers synthesized were improved. The M_w's of polymers b~h were between 3.36 kg/mol and 3.96 kg/mol,the η_inh's of polymers a~h were between 0.061 dL/g and 0.078 dL/g,and the T_gs were between 56℃ and 185℃.The longer the aliphatic chain of the capping agent,the lower the T_g of the polymer;the higher the polarity of the capping agent,the higher the T_g of the polymer.
- hyperbranched aromatic polyamide,
- synthesis,
- characterization
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