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Updated: Sep 29, 2025

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The Hyperbranched Polyester Reinforced Unsaturated Polyester Resin.

Lifei Feng1, Ran Li1,2, Han Yang1

  • 1College of Material Engineering, Fujian Agriculture and Forestry University, Fuzhou 350002, China.

Polymers
|March 26, 2022
PubMed
Summary
This summary is machine-generated.

Hyperbranched polyester (HBP-1) enhances unsaturated polyester resin (UPR) mechanical properties, including tensile and impact strength. While improving thermal stability, HBP-1 did not significantly boost thermodynamic properties due to its flexible structure.

Keywords:
hyperbranched polyestermechanical propertiesreinforcementthermostabilityunsaturated polyester resin

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Area of Science:

  • Polymer Science
  • Materials Science

Background:

  • Unsaturated polyester resin (UPR) is a widely used thermosetting polymer.
  • Improving the mechanical and thermal properties of UPR is crucial for expanding its applications.

Purpose of the Study:

  • To develop a hyperbranched polyester (HBP-1) for reinforcing and toughening UPR.
  • To investigate the effects of HBP-1 on the morphology, mechanical, and thermal properties of UPR composites.

Main Methods:

  • HBP-1 was synthesized using polyethylene glycol, phthalic anhydride, glycerol, maleic anhydride, and isooctanol.
  • Fourier Transform Infrared Spectroscopy (FT-IR) characterized HBP-1.
  • Thermogravimetric Analysis (TGA), Dynamic Mechanical Analysis (DMA), mechanical testing, and Scanning Electron Microscopy (SEM) analyzed HBP-1/UPR composites.

Main Results:

  • HBP-1 incorporation enhanced the thermal stability of UPR.
  • Tensile strength, bending strength, and impact strength of UPR were improved by HBP-1.
  • DMA indicated that the flexible chains in HBP-1 did not significantly improve the thermodynamic properties of UPR.

Conclusions:

  • HBP-1 is an effective reinforcing and toughening agent for UPR, enhancing mechanical performance and thermal stability.
  • The flexible structure of HBP-1 limits improvements in thermodynamic properties.
  • The study provides insights into modifying UPR with hyperbranched polymers for advanced material applications.