新型含磷阻燃环氧树脂的合成与表征  

Synthesis and characterization of phosphorus- containing epoxy resin for flame retardance

作　　者：夏新年[1] 张小华[1] 陈义红[1] 熊远钦[1] 徐伟箭[1] 

机构地区：[1]湖南大学化学化工学院,湖南长沙410082

出　　处：《化工进展》2007年第1期56-59,共4页Chemical Industry and Engineering Progress

摘　　要：以2-(5,5-二甲基-4-苯基-2-氧代-1,3,2-二氧磷杂环已烷膦酸酯基)-对苯二酚和双酚A二缩水甘油酯合成了一新型的含环状膦酸酯结构的阻燃环氧树脂(DPODB-EP)。采用元素分析、红外光谱(FTIR)和凝胶渗透色谱(GPC)对该含磷环氧树脂的结构和相对分子质量分布进行了表征。采用示差扫描量热法(DSC))和热失重法(TG)对DPODB-EP/PN固化物热性能进行了测试,发现该固化物具有较高的玻璃化转变温度(165℃)和较高的燃烧残炭率(700℃,31%)。阻燃性能测试表明该固化物具有较好的阻燃效果,在磷的质量分数为2.25%时其极限氧指数可达29.5%。A novel phosphorus-containing epoxy resin with good solubility and high thermal stability was obtained via the reaction of diglycidyl ether of bisphenol A with 2-（5,5-dimethyl-4-phenyl-2-oxy-1,3,2-dioxa- phosphorin-6-yl）1,4-benzenediol, and its structure and relative molecular weight distrubutuin were characterized with elemental analysis, FHR and gel permeation chromatography （GPC）. A phenol formaldehyde novolac resin （PN） was used as curing agent to prepare a thermoset resin with the phosphorus-containing epoxy resin. The thermal properties and thermal degradation behavior of the thermoset resin was investigated by using differential scanning calorimetry （DSC） and thermogravimetdc analysis （TGA）. Phosphorus-containing cured resin exhibited higher glass transition temperature （165 ℃） than the ordinary disphenol-A epoxy resins （129℃） due to the high rigidity of its molecular chain. TGA studies showed high residue （700℃ 31%） of the PN-cured epoxy resin due to the presence of phosphorous in the main chain. A sample containing 2.25% （mass ratio） phosphorus had limiting oxygen index values of 29.5. The developed resin may be used potentially in electronic industries.

关 键 词：环状膦酸酯 环氧树脂 阻燃 

分 类 号：TQ314[化学工程—高聚物工业] O633[理学—高分子化学]