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Citation: XU Dong-Mei, ZHANG Ke-Da, XU Yin, ZHU Xiu-Lin. Synthesis of Dendritic Epoxide Hardener Containing Multiaminogroups and Its Curing Performance[J]. Chinese Journal of Applied Chemistry, ;2004, 21(7): 708-712. shu

Synthesis of Dendritic Epoxide Hardener Containing Multiaminogroups and Its Curing Performance

XU Dong-Mei ^a ,
ZHANG Ke-Da ^a,, ,
XU Yin ^b ,
ZHU Xiu-Lin ^a

1.
a Institute of Chemistry and Chemical Engineering, Suzhou University, Suzhou 215006;
2.
b Testing and Analysis Center, Suzhou University, Suzhou 215006

Corresponding author: ZHANG Ke-Da,
Received Date: 29 August 2003
Available Online: 19 December 2003
Fund Project: 苏州大学研究生论文资助基金和苏州大学青年基金(Q3109205)资助项目 (Q3109205)

Dendrimer[G1.5(NH₂)]with peripheral multiamimogroups was synthesized from dendrimer[G1.0(=)]and ethylene diamine (EDA) by Michael addition reaction.The optimum conditions were:n[G1.0(=)]:n(EDA)=1:360,CH₃OH as solvent and catalyst,reaction temperature 30℃ and reaction time 24 h.Yield and mass fraction of G1.5(NH₂) were 93.6% and 98.4% respectively.The structure of G1.5(NH₂) was identified by IR,NMR and elemental analysis.G1.5(NH₂) was less volatile,little poisonous,well compatible with epoxide and could be used as its hardener.The pot life and gelation time of the G1.5(NH₂)/epoxide systems were 5.0 and 2.1 times that of the EDA/epoxide systems respectively,while the curing speed was 2.9,5.8,12.0 and 17.1 times that of EDA systems,when cured at 50℃,95℃,120℃ and 150℃ respectively.DSC analysis showed that G1.5(NH₂) systems gradually liberated heat in two stages during the curing process,and the total heat liberated was less than that of EDA systems.
- dendrimer,
- epoxide,
- hardener,
- acrylic double bond,
- ethylene diamine
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