Bulk Polymerization of Thermoplastic Shape Memory Epoxy Polymer for Recycling Applications

Author:

Zhuo Haitao1,He Zhen2,Liu Jun1,Ma Guocheng2,Ren Zhenghe2,Zeng Youhan2,Chen Shaojun2ORCID

Affiliation:

1. College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen 518060, China

2. College of Materials Science and Engineering, Shenzhen University, Shenzhen 518053, China

Abstract

Conventional epoxy polymers are thermo-set and difficult to recycle and reuse. In this study, a series of linear thermoplastic epoxy polymers (EPx) with shape memory properties were prepared by using a bifunctional monoamine diglycolamine (DGA) as a curing agent and an equivalent amount of bifunctional rigid epoxy resin (E-51) and bifunctional flexible epoxy resin (polypropylenglycol diglycidyl ether, PPGDGE) in a bulk polymerization reaction. The results showed that these samples can fully react under the curing process of, 60 °C/2 h, followed by 80 °C/2 h, followed by 120 °C/2 h. The introduction of different contents of PPGDGE can adjust the Tg of the material to adapt to different environmental requirements, and can significantly increase the fracture strain of the material and improve its micro-phase separation structure. Thus, Rf of the material is close to 100%, and Rr is increased from 87.98% to 97.76%. Importantly, this linear chain structure allows the material to be easily recycled and reprocessed by dissolving or melting, and also means the material shows potential for 3D printing or other thermoplastic remolding.

Funder

National Natural Science Foundation of China

Guangdong Basic and Applied Basic Research Foundation

Shenzhen Science and Technology Planning Project

Scientific Research Project of Guangdong Provincial Department of Education

Publisher

MDPI AG

Subject

Polymers and Plastics,General Chemistry

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