基于 DOPO 水解产物合成的高性能阻燃液体避免了 DOPO 的缺陷
Polymer Degradation and Stability
(
IF
7.4
)
Pub Date : 2024-11-30
, DOI:
10.1016/j.polymdegradstab.2024.111116
Peifeng Liu
,
Xiang Wang
,
Xingwu Jiang
,
Jinzheng Huang
,
Zhenzhen Dong
,
Shicheng Miao
,
Siqi Huo
首先提出用 DOPO 的水解产物，具有更类似于 EP 的结构的 2-（2-羟基苯基）苯基膦酸 （HPPA） 来替代 DOPO 制备阻燃剂，最后基于 HPPA 合成了一种高效的液体阻燃剂 DP，DP 的理论磷含量高达 17.5wt%， 因此，EP 只需少量添加 DP 即可达到优异的阻燃/抑制燃烧效果。例如，EP/DP6.0 的 LOI 增加到 41.2 % 并达到 UL-94 的 V-0 率，PHRR 和 THR 分别降低了 52.4 % 和 45.2 %，此外，少量添加 DP 不会破坏 EP 的整体性能，保持和改善了环氧树脂整体上优异的机械和热性能， DP具有优异的固化促进效果，满足高性能EP的加工和使用要求。总体上优于 DOPO，具有良好的应用前景。
A high-performance flame retardant liquid synthesized on the basis of DOPO hydrolysis products avoids the defects of DOPO
It was first proposed to use 2-(2-hydroxyphenyl) phenyl phosphonic acid (HPPA), which is hydrolysis product of DOPO, has a structure more similar to EP, to replace DOPO in the preparation of flame retardant, and finally synthesized a highly efficient liquid flame retardant DP based on HPPA, the theoretical phosphorus content of DP is up to 17.5wt%, so EP can achieve excellent flame retardant/inhibit combustion effect with a small amount addition of DP. For example, the LOI of EP/DP6.0 is increased to 41.2 % and reaches the V-0 rate of UL-94, the PHRR and THR are reduced by 52.4 % and 45.2 % respectively, in addition, the addition of DP in small quantities does not destroy the overall performance of EP, maintains and improves the excellent mechanical and thermal properties of epoxy resin as a whole, and DP has excellent curing promoting effects, meeting the processing and use requirement of high performance EP. It is better than DOPO overall and has good application prospects.
