工程塑料应用2018年,第46卷,第4期132的甲醛含量。
(2)对比IH–2、三聚氰胺、尿素3种氨基衍生物型甲醛捕捉剂发现,IH–2通过对树脂的改性不仅更大幅度地降低了泡沫塑料的甲醛释放量,还提高了泡沫塑料的力学性能。
当IH–2质量分数为5%时,泡沫塑料的回弹率、撕裂强度、拉伸强度和断裂伸长率达到最优,分别较未加入甲醛捕捉剂的提高了12.7%,40%,31.3%和35.4%。
(3) IH–2添加过程简单、反应时间短,质量分数为5%的IH–2能够使三聚氰胺甲醛树脂储存时间由2 d延长到5.3 d,使树脂中的游离甲醛含量由5.42%降低到0.23%,甲醛减少率达到95.76%。
(4)质量分数为5%的IH–2可使三聚氰胺泡沫塑料的甲醛释放量由1.43 mg/L降低到0.31 mg /L,甲醛减少率达到78.27%,低于业内称为“零甲醛”E0级产品甲醛释放量的上限值(0.5 mg/L)。
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