聚三唑酯树脂的合成及其性能

通过酯化反应合成丁二酸二炔丙醇酯(DPS)、间苯二甲酸二炔丙醇酯(DPIP)、对苯二甲酸二炔丙醇酯(DPP)，与三官能团叠氮化合物(TAMTMB)反应，制备了3种热固性聚三唑酯(PTAE)树脂，研究了树脂的加工特性、固化行为、树脂固化物的力学性能，制备和表征了T700单向碳纤维增强PTAE树脂复合材料。结果表明，PTAE树脂具有良好的加工性能，可在较低温度(80℃)下固化；固化后的PTAE树脂的玻璃化转变温度(Tg)受主链结构影响，3种树脂的Tg均高于140℃，浇铸体弯曲强度高于170 MPa，T700单向纤维增强PTAE树脂复合材料的常温弯曲强度高于1500 MPa。

Synthesis and properties of poly(triazole ester) resins

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.