As a new kind of resin system, polytriazole resin has lots of excellent properties, including excellent low temperature curing property, excellent thermal property and low vacuum outgassing rate, which is expected to be used as matrix resins in the application of satellites. In recent years, we have carried out a series of studies on the polytriazole resin systems. Different kinds of polytriazole resin are prepared by changing the chemical structure of azides and alkynyl compounds, reaction degree, main chain or side chain, etc. In this work, we hope to explore the effect of ester groups on curing behavior and thermodynamic properties of polytriazole resin system. Comparing the properties of three new polytriazole resin, we try to find a way for the development of a higher performance polytriazole resin. Dipropargyl succinate (DPS), dipropargyl isophthalate (DPIP) and dipropargyl phthalate (DPP) were synthesized by esterification. Three kinds of poly(triazole ester) (PTAE) resins were designed and synthesized from DPS, DPIP, DPP and multifunctional azides (TAMTMB) through thermal polymerization. T700 carbon fiber-reinforced PTAE composites were prepared and characterized. The processing properties, curing behaviors and mechanical properties of resins were investigated. The results revealed that PTAE resins had good processing properties and could be cured at a low temperature (80℃) . The glass transition temperatures (Tg) of the cured PTAE resins were greatly influenced by the structure of the crosslinked backbone, which was higher than 140℃. Flexural strength of the cured PTAE resins was higher than 170 MPa. Flexural strength of the T700 carbon fiber-reinforced PTAE composited at ambient temperature arrived at over 1500 MPa. From the above results, the introduction of ester group did not change the low temperature curing characteristics of polytriazole resin, and the mechanical properties of polytriazole resin did not change remarkably. Three kinds of poly(triazole ester) were expected to be used as the resin matrix of high performance composites.
Bo PAN Luyu WANG Haijun WANG Songda JIANG Liqiang WAN Xufeng HAO Jie TIAN Farong HUANG
. Synthesis and properties of poly(triazole ester) resins[J]. The Chinese Journal of Process Engineering, 2019
, 19(1)
: 181
-188
.
DOI: 10.12034/j.issn.1009-606X.218145
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