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首页> 外文期刊>Polymer Degradation and Stability >Synthesis of a novel phosphorus-containing epoxy curing agent and the thermal, mechanical and flame-retardant properties of the cured products
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Synthesis of a novel phosphorus-containing epoxy curing agent and the thermal, mechanical and flame-retardant properties of the cured products

机译：新型含磷环氧固化剂的合成及其固化产物的热，机械和阻燃性能

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摘要

A novel α, ω-dicarboxyl aromatic polyphosphonate (HP-1001-COOH) was synthesized and characterized. It was used as a reactive flame retardant for diglycidyl ether of bisphenol A (DGEBA)/methyl tetrahy-drophthalic anhydride (MeTHPA) cured system. The thermal, mechanical and flame retardant properties of the cured epoxy resins were examined. The glass transition temperature (T_g) of the cured epoxy resins decrease with the increasing of the HP-1001-COOH content. The mechanical properties of cured films were slightly affected, although the crosslinking density decreases with the incorporation of HP-1001-COOH. The onset decomposition temperatures and the maximum-rate decomposition temperatures decrease, while the char yields increase with the increase of the phosphorus content When the mass fraction of HP-1001 -COOH is 30 wt%, the epoxy thermosets reaches a LOI value of 32.4% and successfully pass UL-94 V-0 rating. The heat release rate (HRR), peak heat release rate (P-HRR), total heat release (THR), average of effective heat of combustion (AvEHC) and total smoke production (TSP) of the flame retardant epoxy resins decrease significantly compared with neat epoxy resin. The macro-morphology and micro-morphology of the residues after cone calorimeter tests show that the flame retardant epoxy thermosets compact char layers are formed to prevent the transmission of heat and gases during combustion process, and the main structure in the char residues of the phosphorus-containing epoxy resins are polyaromatic carbons and phosphate esters.
机译：合成并表征了一种新型的α，ω-二羧基芳族多膦酸酯（HP-1001-COOH）。用作双酚A（DGEBA）/甲基四氢-邻苯二甲酸酐（MeTHPA）固化体系的二缩水甘油醚的反应性阻燃剂。检查了固化环氧树脂的热，机械和阻燃性能。固化环氧树脂的玻璃化转变温度（T_g）随着HP-1001-COOH含量的增加而降低。尽管随着HP-1001-COOH的加入，交联密度降低，但固化膜的机械性能略有受影响。起始分解温度和最大分解速率降低，而炭产率随磷含量的增加而增加。HP-1001-COOH的质量分数为30 wt％时，环氧热固性材料的LOI值达到32.4％并成功通过UL-94 V-0评级。阻燃环氧树脂的热释放率（HRR），峰值热释放率（P-HRR），总热释放（THR），平均有效燃烧热（AvEHC）和总烟气产生（TSP）明显降低与纯净的环氧树脂。锥形量热仪测试后残留物的宏观形态和微观形态表明，形成了阻燃环氧树脂热固性致密炭层，以防止燃烧过程中的热量和气体传递，磷的炭渣中的主要结构含环氧树脂是聚芳族碳和磷酸酯。

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