One-pot synthesis of tetramethyl biphenyl backboned hyperbranched epoxy resin as an efficient toughening modifier for two epoxy curing systems

In this article, an approach to toughen epoxy thermosets with hyperbranched epoxy resin is presented. First, three tetramethyl biphenyl backboned hyperbranched epoxy resins (BPHBEs) were synthesized through a simple one-pot A 2  + B 3 polycondensation reaction. Then, they were incorporated into epox...

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Bibliographic Details
Published inPolymer bulletin (Berlin, Germany) Vol. 75; no. 10; pp. 4571 - 4586
Main Authors Fei, Xiaoma, Tang, Yuyao, Wei, Wei, Zhu, Ye, Luo, Jing, Li, Xiaojie, Chen, Mingqing, Liu, Xiaoya
Format Journal Article
LanguageEnglish
Published Berlin/Heidelberg Springer Berlin Heidelberg 01.10.2018
Springer Nature B.V
Subjects
Anhydrides
Characterization and Evaluation of Materials
Chemistry
Chemistry and Materials Science
Complex Fluids and Microfluidics
Curing
Epoxy resins
Fourier transforms
Heat resistance
Impact strength
Morphology
NMR
Nuclear magnetic resonance
Organic Chemistry
Original Paper
Phase separation
Physical Chemistry
Polycondensation reactions
Polymer Sciences
Polymers
Shear strength
Soft and Granular Matter
Thermomechanical properties
China
Epoxy resin
Biphenyl
Additive
Hyperbranched polymer
Toughening
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Summary:In this article, an approach to toughen epoxy thermosets with hyperbranched epoxy resin is presented. First, three tetramethyl biphenyl backboned hyperbranched epoxy resins (BPHBEs) were synthesized through a simple one-pot A 2  + B 3 polycondensation reaction. Then, they were incorporated into epoxy/anhydride and epoxy/jeffamine curing systems, respectively. The curing behavior was investigated by differential scanning calorimetry, which reveals that the adding of BPHBE to the formulation would not much affect the curing process. The influence of BPHBE on the mechanical and thermomechanical properties of both epoxy/anhydride and epoxy/jeffamine systems was studied. The results show that BPHBE can significantly toughen both two systems without much trade-offs in their strength, modulus and T g . While the initial decomposition temperature of the cured thermosets slightly drops. Owing to the miscible backbone structure and terminal epoxy groups, no phase separation was observed in SEM.
ISSN:0170-0839
1436-2449
DOI:10.1007/s00289-018-2269-2