三种磷酸盐类阻燃剂对脲醛树脂固化过程的影响

用差示扫描量热法（ＤＳＣ）研究了三种磷酸盐类阻燃剂（磷酸二氢胺ＭＡＰ、磷酸氢二铵ＤＡＰ和聚磷酸铵ＡＰＰ）对脲醛树脂胶粘剂（ＵＦ）固化反应起始温度、反应速度以及最终固化程度的影响。结果表明：（１）ＡＰＰ和ＭＡＰ可以降低阻燃胶粘剂的ｐＨ值，而ＤＡＰ则使ｐＨ值升高；（２）ＡＰＰ和ＭＡＰ可以降低ＵＦ胶固化反应活化能，使固化反应在较低的温度下开始，但相应的阻燃ＵＦ胶最终固化程度低于不加阻燃剂的ＵＦ胶；（３）

INFLUENCES OF THREE PHOSPHATE FIRE_RETARDANTS ON THE CURING OF UREA_FORMALDEHYDE RESIN ADHESIVE

The influences of 3 phosphate fire retardants(monoammonium phosphate MAP, diammonium phosphate DAP and ammonium polyphosphate APP) on the curing process of UF resin adhesive were studied by differential scanning analysis (DSC). The results indicated that: 1) APP and MAP could be incorporated in a UF resin to formulate a fire retardant adhesive system; 2) APP and MAP played a dual role in the curing of UF, they could decrease the activation energy of curing reaction of UF and therefore lower the onset temperature, however the curing speed and the final cure degree of a fire retardant UF were less than that of a UF without APP or MAP; 3) DAP inhibited almost completely the curing of UF and thus was not a suitable agent for fire retardant UF adhesive systems.