影响聚醚型聚氨酯弹性体合成的因素

Influential factors of preparing polyether-polyol type polyurethane elastomer

以聚乙二醇醚二醇（PEG）、二苯基甲烷二异氰酸酯（MDI）和1,4-丁二醇（BDO）为原料合成了聚醚型聚氨酯弹性体;考察了催化剂的作用,确定了反应条件：预聚反应温度为80±5℃,反应时间为1.5~2 h;聚醚多元醇的含水量控制在0.03%（质量分数）以下;在130℃下熟化时间为4 h。并对产品进行了IR、DSC分析。

The polyurethane elastomers based on polyether-polygol（PEG）,4,4-diphenylmethane diisocyanate（MDI） and 1,4-dihydroxybutane（BDO） were synthesized.The types of catalyst were explored;the temperature of prepolymer was（80±5）℃ and the time of prepolymer was 1.5～2 h;moisture percent in polymerization was controlled under 0.03%;the time of post cure was 4 h with the temperature 130 ℃;the products were characterized by FTIR and DSC.