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Synthesis and characterization of novel hydroxyl-terminated hyperbranched polyurethanes

  • Ji Yin Wang , Yi Ping Huang , Bin Yu , Can Tao , Rong Ma and Ge Wen Xu EMAIL logo
Published/Copyright: August 9, 2014
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Journal of Polymer Engineering
From the journal Journal of Polymer Engineering Volume 34 Issue 8

Abstract

A series of novel hydroxyl-terminated hyperbranched polyurethanes (HBPUs) were synthesized via stepwise polymerization by diethanolamine (DEOA), isophorone diisocyanate (IPDI) and trimethylolpropane (TMP). It is interesting to note that the HBPUs can be purified by water. The HBPUs were characterized with 1H nuclear magnetic resonance (NMR), 13C NMR, Fourier transform infrared spectroscopy (FT-IR) and elemental analysis. The average degree of branching (DB) of HBPUs was calculated from the first generation to the fourth generation to be 1.00, 0.74, 0.59 and 0.57 by quantitative 13C NMR, respectively. The branching model and molecular structure of HBPUs were deduced by the 13C NMR and the value of DB. To investigate the changes of hydrogen bonding interaction in HBPUs with a variation in structure of different generations, the deconvolution of FT-IR spectra was carried out using Origin 7.0 software through the Gaussian curve-fitting method. The ratio of hydrogen-bonded -NH and -OH groups of HBPUs was calculated to be 80.8%, 85.1%, 84.8% and 85.4% from the first generation to the fourth generation by deconvoluted -NH and -OH zone, respectively. The interaction of hydrogen bonding and glass transition temperature (Tg) of HBPUs increased with the increase of generation. The trend of thermal stability and Tg coincide with the change of hydrogen-bonded interactions.

Keywords: deconvolution; degree of branching; hyperbranched polyurethane; stepwise polymerization
Corresponding author: Ge Wen Xu, School of Chemistry and Chemical Engineering, Anhui University, Anhui Key Laboratory of Environment-Friendly Polymer Materials, Anhui University, 111 Jiulong Road, Hefei 230601, Anhui Province, P.R. China, e-mail:

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Supplemental Material

The online version of this article (DOI: 10.1515/polyeng-2013-0313) offers supplementary material, available to authorized users.

Received: 2013-12-5
Accepted: 2014-5-31
Published Online: 2014-8-9
Published in Print: 2014-10-1

©2014 by De Gruyter

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https://doi.org/10.1515/polyeng-2013-0313
Keywords for this article
deconvolution; degree of branching; hyperbranched polyurethane; stepwise polymerization

Articles in the same Issue

  1. Frontmatter
  2. Original articles
  3. Kinetic degradation and storage stability of β-carotene encapsulated by spray drying using almond gum and gum arabic as wall materials
  4. Photo-polymerization of methacrylate based polymer electrolyte for dye-sensitized solar cell
  5. Synthesis and characterization of novel hydroxyl-terminated hyperbranched polyurethanes
  6. Electron beam modified nylon 6-clay nanocomposites: morphology and water absorption behavior
  7. The effect of ultraviolet irradiation and temperature on the resilience of high density polyethylene
  8. Polyaminoamide dendrimers surface-modified with anionic terminal groups for use as calcium carbonate scale inhibitors
  9. Technical feasibility of a new approach to electromagnetic interference (EMI) shielding of injection molded parts using in-mold coated (IMC) nanopaper
  10. Study on crystallization performance of polyethylene terephthalate/polybutylene terephthalate alloys
  11. Numerical study of polymer melt flow in a three-dimensional sudden expansion: viscous dissipation effects
  12. Enhancement of mechanical properties of polypropylene by blending with styrene-(ethylene-butylene)-styrene tri-block copolymer
  13. Development and fabrication of cement reinforced polypropylene composite material spur gear
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