Synthesis and characterization of a novel epoxy resin based on cyclotriphosphazene and its thermal degradation and flammability performance

Synthesis of a novel phosphorus-containing epoxy curing agent and the thermal, mechanical and flame-retardant properties of the cured products

“…However, the P-HRR values of EP-40 and EP-50 exhibited slightly increase in comparison with EP-30, but still much lower than that of EP-0 [46]. Table 8) [47]. However, the THR values of EP-40 and EP-50 did not continued to decrease with the increase of HP-1001-COOH content, which was in accordance with the LOI and UL-94 results discussed above, and the reason was discussed above as well [48].…”

Fabrication and origin of new flame retarding bismaleimide resin system with low dielectric constant and loss based on microencapsulated hexaphenoxycyclotriphosphazene in low phosphorus content

“…On the other hand, as discussed in TGeIR spectra that MH/BD resin releases more non-flammable gases than HPCTP/ BD, so MH/BD resin has more obvious fuel dilution effect. It is worth noting that the content of P element in MH7/BD is 0.33 wt%, while that of P content is as high as 5.8 wt% when the THE value decreases to 46% in the cyclotriphosphazene modified epoxy resin [49]. These comparisons demonstrate that MH exhibits outstanding flame retardancy at a very low P content, this is the greatest advantage of MH reported in this paper and is originated from the multi-mechanisms of flame retardancy as discussed below.…”

Synthesis of Resorcinol-Based Phosphazene-Containing Epoxy Oligomers

“…Currently, there are 2 main synthetic approaches that allow obtaining functional phosphazenes capable of forming covalent bonds with epoxy matrices: synthesis of organophosphazenes with reactive epoxy groups [25,26,27,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55] for addition to the epoxy component, and synthesis of organophosphazenes with reactive amine [56,57,58,59,60,61,62,63,64] groups for use as a hardener. However, at present, most of the processes of synthesis of functional epoxyphosphazenes described in the literature are primarily of scientific interest because of the complexity of their scaling and the large number of intermediate stages [25,33,34,35,36,37,41,42,43,45,46,47,48,50,51,52,53,54,55].…”