Hyperbranched Poly(amide-ester) Mildly Synthesized and Its Characterization

摘要

AB2-type-prepolymerized monomer was rapidly (2 h) prepared atIoom temperature (25℃) using commercially available maleic anhydride (MA) and diethanolamine (DEA) as raw materials.By employing toluene-p-sulfonic acid as a catalyzer, a series of hyperbranched poly(amide-ester) (HBPAE) were successfully synthesized from prepared AB2 monomer by solution condensation polymerization through "one-step process" or "pseudo one-step process" (using pen taerythritol as a center core).The processes were carried out at high temperature of 120 C for 6 h in air atmosphere (inert protection free) with reduced pressure distillation (0.08～0.096 MPa).The results of FT-IR, UV-Vis, TGA, and intrinsic viscosity testing by Ubbelodhe viscometer showed that the prepared HBPAEspossess three-dimensional configuration with unsaturated conjugate structure,large numbers of branches and numerous terminal hydroxyl groups.These result in their lowviscosity, high solubility and thermal stability.