Chinese Journal of Applied Chemistry ›› 2009, Vol. 26 ›› Issue (09): 1031-1035.

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Synthesis and Properties of Hyperbranched Waterborne Polyurethane based on polycarbonatediol

 LIU Dan1, CENG Shao-Min1, YAO Chang1, CHEN Ai-Fang1, XU Zhu-Shun1,2   

  1. (1.College of Materials Science and Engineering; 2.MinistryofEducation Key Laboratory for the Synthesis and Application of Organic Functional Molecules,Hubei University,Wuhan 430062)
  • Received:2008-08-28 Revised:2008-11-04 Published:2009-09-10 Online:2009-09-10


Hyperbranched Waterborne Polyurethane (HBAPU) was synthesized via A2+bB2 approach using 2,4-toluylene diisocyanate(TDI), polycarbonatediol (PCDL) ,dimethylol propionic acid (DMPA) and diethanol amine (DEOA) as materials. The structure of the products were characterized by FT-IR and 13C NMR. The result showed that the degree of the branching (DB) of the HBAPU increased with the molar ratio of the NCO/OH increased. The properties of the products were measured by PCS, TG, tensile tests ,the water-resistant of the cast films were also investgated.the partical sizes of the HBAPU was 20.57 nm, compareing with that of line aqueous polyurethane with 130.91 nm when the content of DMPA was 0.4 mmol/g,meanwhile, the HBAPU exhibited good water resistant, heat resistance and tensile strength.

Key words: Hyperbranched, Waterborne polyurethane, Synthesis, Properties

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