@Article{jrm.2019.07905,
AUTHOR = {Jie Xu, Jiayao Yang, Peng Lin, Xiaohuan Liu, Jinjie Zhang, Shenyuan Fu, Yuxun Tang},
TITLE = {Bio-Based Hyperbranched Toughener From Tannic Acid and Its Enhanced Solvent-Free Epoxy Resin with High Performance},
JOURNAL = {Journal of Renewable Materials},
VOLUME = {7},
YEAR = {2019},
NUMBER = {12},
PAGES = {1333--1346},
URL = {http://www.techscience.com/jrm/v7n12/38048},
ISSN = {2164-6341},
ABSTRACT = {It is essential to design economic and efficient tougheners to prepare
high-performance epoxy resin; however, this has remained a huge challenge.
Herein, an eco-friendly, low-cost, and facile-fabricated bio-based hyperbranched
toughener, carboxylic acid-functionalized tannic acid (CATA), was successfully
prepared and applicated to the preparation of solvent-free epoxy resins. The
mechanical performance, morphology, structural characterization, and thermal
characterization of toughened epoxy resin system were studied. The toughened
epoxy resin system with only 1.0wt% CATA reached the highest impact strength,
111% higher than the neat epoxy resin system. Notably, the tensile strength and
elongation at break of toughened epoxy resin systems increased moderately with
increasing CATA loading. Nonphase-separated hybrids with significant
toughening effect were obtained. Additionally, the thermal stabilities of
toughened epoxy resin systems decreased with increasing CATA loading. This
study provides an eco-friendly, cost-effective, and facile approach for the
preparation of high-performance, solvent-free epoxy resins with potential for
practical applications in sealing integrated circuits and electrical devices fields.},
DOI = {10.32604/jrm.2019.07905}
}