Intrinsically Anti-Flammable Apigenin-derived Epoxy Thermosets with High Glass Transition Temperature and Mechanical Strength

Hafezeh Nabipour; Xin Wang; Lei Song; Yuan Hu

doi:10.1007/s10118-022-2779-0

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Intrinsically Anti-Flammable Apigenin-derived Epoxy Thermosets with High Glass Transition Temperature and Mechanical Strength

RESEARCH ARTICLE | Updated：2022-09-23

- Intrinsically Anti-Flammable Apigenin-derived Epoxy Thermosets with High Glass Transition Temperature and Mechanical Strength
- Chinese Journal of Polymer Science Vol. 40, Issue 10, Pages: 1259-1268(2022)
- Affiliations：
  
  State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei 230026, China
- Author bio：
  
  wxcmx@ustc.edu.cn (X.W.)
  yuanhu@ustc.edu.cn (Y.H.)
- Funds：
- DOI：10.1007/s10118-022-2779-0
  CLC：
- Received：02 December 2021，
  
  Revised：2022-4-6，
  
  Accepted：25 April 2022，
  
  Online First：21 July 2022，
  
  Published：01 October 2022
- Accepted：
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Nabipour, H.; Wang, X.; Song, L.; Hu, Y. Intrinsically anti-flammable apigenin-derived epoxy thermosets with high glass transition temperature and mechanical strength. Chinese J. Polym. Sci. 2022, 40, 1259–1268

Hafezeh Nabipour, Xin Wang, Lei Song, et al. Intrinsically Anti-Flammable Apigenin-derived Epoxy Thermosets with High Glass Transition Temperature and Mechanical Strength[J]. Chinese Journal of Polymer Science, 2022, 40(10): 1259-1268.
Nabipour, H.; Wang, X.; Song, L.; Hu, Y. Intrinsically anti-flammable apigenin-derived epoxy thermosets with high glass transition temperature and mechanical strength. Chinese J. Polym. Sci. 2022, 40, 1259–1268 DOI： 10.1007/s10118-022-2779-0.

Hafezeh Nabipour, Xin Wang, Lei Song, et al. Intrinsically Anti-Flammable Apigenin-derived Epoxy Thermosets with High Glass Transition Temperature and Mechanical Strength[J]. Chinese Journal of Polymer Science, 2022, 40(10): 1259-1268. DOI： 10.1007/s10118-022-2779-0.

摘要

An apigenin-derived epoxy monomer (DGEA) was synthesized. The cured DGEA thermoset showed an ultrahigh

of 232 °C and exceptional antiflammability with a UL-94 V-0 grade

whereas the cured petroleum-based diglycidyl ether of bisphenol A (DGEBA) thermoset behaved high flammability and a relatively low

(156 °C).

Abstract

In this work

apigenin was chosen as a raw material to synthesize a novel epoxy monomer (DGEA)

while the bio-based epoxy resin was further obtained after curing with 4

4’-diaminodiphenylmethane (DDM). The control samples were prepared by curing diglycidyl ether of bisphenol A (DGEBA) with DDM. The non-isothermal differential scanning calorimeter (DSC) method was utilized to further investigate the curing behavior and curing kinetics of the DGEA/DDM system. Despite no flame retardant active elements

the DGEA/DDM thermoset still exhibited exceptional anti-flammability. Specifically

the DGEA/DDM thermoset reached a V-0 rating in the UL-94 test and owned a high limiting oxygen index (LOI) value of 37.0%

while DGEBA/DDM resins were consumed completely in the vertical combustion test with a low LOI of 23.0%. Furthermore

the microscale combustion calorimetry (MCC) results manifested that compared with DGEBA/DDM resins

both PHRR and THR values of the DGEA/DDM resins were dropped by 84.0% and 57.6%

respectively. Additionally

the DGEA/DDM resin also presented higher storage modulus and tensile strength compared with DGEBA/DDM one. Particularly

in contrast with that of the cured DGEBA/DDM one (156 °C)

the DGEA/DDM thermoset displayed an extremely high glass transition temperature (232 °C). This study breaks new ground on how to produce bio-based monomers with aromatic structures and achieve high-performance thermosetting polymers.

关键词

Keywords

references

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