Research Progress in Modification of Epoxy Resins with Hyperbranched Polyesters

doi:10.19491/j.issn.1001-9278.2021.01.018

Abstract

Abstract:

This paper reviewed the research progress in the modification of epoxy resin with hyperbranched polyesters （HBPEs）. The synthetic methods of hydroxyl-terminated/carboxyl-terminated/epoxy-terminated/amino-terminated HBPEs were summarized at first. The research progress in the impact modification of epoxy resins by the HBPEs with different end groups and their toughening mechanism was introduced. The influence of the HBPEs with different end groups on the curing properties of epoxy resin was also discussed. In addition， the problems in the modification of epoxy resins with HBPEs were analyzed. The research directions in future will focus on the green synthetic methods of HBPEs with a low cost as well as the multifunctionalization of HBPEs.

Key words: hyperbranched polyester, epoxy resin, toughing modification, curing modification

CLC Number:

TQ 323.5

XU Weikun, WANG Huili, DONG Yizheng, YUAN Huiqiang, FAN Ping. Research Progress in Modification of Epoxy Resins with Hyperbranched Polyesters[J]. China Plastics, 2021, 35(1): 110-123.

Figures/Tables 20

Fig.1. Synthesis of hydroxyl?terminated HBPE from different polyol core molecules

Fig.2. Polyol core molecules used in the synthesis of hydroxyl?terminated HBPE

Fig.3. Synthesis of hydroxyl?terminated HBPE from adipic acid and glycerol via an A2 + B3 method

Fig.4. Synthesis of hydroxyl?terminated HBPE from di(ethylene glycol) and aconitic acid via an A2 + B3 method

Fig.5. Synthesis of hydroxyl?terminated HBPE by ring?opening polymerization

Fig.6. Synthesis of carboxyl?terminated HBPE

Fig .7. Synthesis of carboxyl?terminated HBPE from DGEBA，succinic acid and 1,3,5?benzenetricarboxylic acid via an A2 + B3 method

Fig.8. Synthesis of carboxyl?terminated HBPE by modifying hydroxyl?terminated HBPE with succinic anhydride

Fig.9. Synthesis of epoxy?terminated HBPE by modifying hydroxyl?terminated and carboxyl?terminated HBPE with ECH

Fig.10. Synthesis of epoxy?terminated HBPE by modifying hydroxyl?terminated HBPE with 3?mercaptopropionic acid and allyl glycidyl ether

Fig.11. Synthesis of epoxy?terminated HBPE by modifying hydroxyl?terminated HBPE with 10?undecenoyl chloride and 3?chlorobenzoperoxoic acid

Fig.12. Synthesis of amino?terminated HBPE by modifying hydroxyl?terminated HBPE with DETA

Fig.13. SEM photographs for fracture surfaces of DGEBA/HBPE with different HBPE content

Fig.14. SEM photographs for fracture surfaces of DGEBA/HBPE with different HBPE content

Fig.15. In situ homogeneous reinforcing and toughening mechanism

Fig.16. SEM photographs for fracture surfaces of DGEBA/ epoxy?functionalized HBPE composite

Fig.17. Schematic illustration of crosslinkedepoxy networks

Fig.18. Mechanisms of initiation of the anionic ring?opening polymerization of epoxides in the presence of reactive hydroxyl groups

Fig.19. Activated monomer and activated chain end mechanisms

Fig.20. Reaction principle of hyperbranched polyester?modified carbon nanotubes

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