Mechanical Properties and Fracture Toughness of Epoxy Resin Improved by Low-viscosity Hyperbranched Epoxy

DOI

10.2991/icadme-15.2015.308How to use a DOI?

Keywords

mechanical property, fracture toughness, epoxy, hyperbranched, low-viscosity

Abstract

Epoxy resins modified with low-viscosity hyperbranched epoxy were prepared. The tensile strength, flexural strength, impact strength, fracture toughness, glass transition temperature (Tg) of the cured samples were investigated. The results show that the addition of hyperbranched epoxy improves the overall mechanical and fracture performance because of the unique three-dimensional macromolecule structure. With the content of hyperbranched epoxy increases, the tensile strength, flexural strength, impact strength and fracture toughness all increases first and then decreases. This variation trend can be attributed to the reverse effect of crosslinking density and the rigidity of molecule chain of the hyperbranched epoxy. The Tg of the cured samples decreases in the whole range studied. The decrease of viscosity may be contributive to developing an easier fabrication process of the epoxy based materials.

Copyright

© 2015, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Zhongwei Zhang
AU  - Xiaolong Wang
AU  - Xiaoguang Hu
AU  - Ting Xu
AU  - Yanyan Lin
AU  - Yefa Tan
PY  - 2015/10
DA  - 2015/10
TI  - Mechanical Properties and Fracture Toughness of Epoxy Resin Improved by Low-viscosity Hyperbranched Epoxy
BT  - Proceedings of the 5th International Conference on Advanced Design and Manufacturing Engineering
PB  - Atlantis Press
SP  - 1662
EP  - 1666
SN  - 2352-5401
UR  - https://doi.org/10.2991/icadme-15.2015.308
DO  - 10.2991/icadme-15.2015.308
ID  - Zhang2015/10
ER  -