Citation: Li Lei, Zhu Zhitian, Jin Kaikai, Wang Jiajia, Zheng Shijun, Fang Qiang. Synthesis, Thermostability and Mechanical Properties of the Ether- Based Benzoxazine Resin with Benzoyl Moiety in the Side Chain[J]. Chinese Journal of Organic Chemistry, ;2016, 36(4): 844-849. doi: 10.6023/cjoc201511029 shu

Synthesis, Thermostability and Mechanical Properties of the Ether- Based Benzoxazine Resin with Benzoyl Moiety in the Side Chain

Li Lei ^a,b ,
Zhu Zhitian ^a ,
Jin Kaikai ^a ,
Wang Jiajia ^a ,
Zheng Shijun ^b,, ,
Fang Qiang ^a,,

a.
a. Key Laboratory of Synthetic. and Self-Assembly Chemistry for Organic. Functional Molecules, Shanghai Institute of Organic. Chemistry, Chinese Academy of Sciences, Shanghai 200032;
b.
b. School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450052

Corresponding author: Zheng Shijun, Fang Qiang,
Received Date: 16 November 2015
Available Online: 29 November 2015
Fund Project: 国家自然科学基金(Nos.21374131,21574146)资助项目. (Nos.21374131,21574146)

A new ether-based benzoxazine monomer having a benzoyl moiety in the side chain is reported. This monomer showed good solubility in common organic solvents and low melting point (<125 ℃). Upon heating at high temperature, the monomer converted to an insoluble and infusible resin, which showed high thermostability with a 5 wt% weight loss temperature of 380 ℃ and a char yield of 66% at 800 ℃. Moreover, the resin exhibitedgood addhesion ability to metals with the shear strength of 6.5 MPa. For comparison, a benzoxazine without benzoyl unit was prepared. After cured, such a comparative benzoxazine showed a 5 wt% weight loss temperature of 322 ℃ and a char yield of 43%, and the shear strength of 4.7 MPa, respectively. These results indicate that the introduction of the a benzoyl moiety into the ether-based benzoxazine as the side chain can efficiently improve both of the thermostability and mechanical properties of the benzoxazine. This new benzoxazine could be used as matrix or producing the carbon/glass fiber reinforced composites, as well as the adhesives for binding the metals.
- benzoxazine,
- benzoyl,
- thermostability,
- mechanical properties
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