新型环状磷酸酯的合成及其阻燃性能研究

Synthesis and Flame Retardancy of a Novel Cyclic Phosphate

摘要:

本文以新戊二醇、三氯氧磷和1,1,1-三（4-羟基苯基）乙烷（THPE）为原料合成了一种环状磷酸酯阻燃剂DOPC-THPE，采用红外光谱、核磁氢谱、核磁碳谱、核磁磷谱表征了其化学结构。将该阻燃剂添加到聚丙烯（PP）中，通过极限氧指数（LOI）、垂直燃烧（UL-94）实验研究了材料的阻燃性能，同时利用热重分析（TGA）表征了阻燃剂和材料的热稳定性。结果表明DOPC-THPE具有较好的热稳定性和成炭性，700 ℃残炭量达35.9%，30%添加量可使PP的LOI值从17.5%提高到25.0%，通过垂直燃烧V-1级。

Abstract:

A cyclic phosphate flame retardant named DOPC-THPE was synthesized from neopentyl glycol, phosphorus oxychloride and 1,1,1-tris(4-hydroxyphenyl)ethane (THPE). The chemical structure of DPPC-THPE was identified via FTIR, 1HNMR, 13CNMR and 31PNMR. TGA curves indicated that DPPC-THPE had good charring performance and thermal stability, with a char of 35.9% at 700 ℃. Then the product was added to polypropylene to improve its flame retardancy. Limited oxygen index (LOI) and vertical burning tests were utilized to investigate the flame retardancy of the samples. The results suggested that when the loading of DOPC-THPE was 30.0 wt%, the LOI value of PP composite could be increased from 17.5 to 25.0% and V-1 rating could be achieved.