首先将甲醛和丁醛在碱性催化剂的条件下,反应生成2,2-二羟甲基丁醛(DMB),其次将 DMB与 DO-PO 反应生成DOPO 三元醇,最后用DOPO 三元醇与二正丁基氧化锡反应生成新型的螺环化合物,并通过FT-IR和N MR对中间体和最终产物进行结构表征,结果表明成功制备了中间体和最终产物.同时还考察了螺环化合物开环聚合过程中体积膨胀率以及对环氧树脂体积膨胀率的变化,实验结果表明,开环聚合过程体积膨胀率为3．46％,当螺环化合物的添加量为20％时,环氧树脂的体积膨胀率为2．67％.
Firstly,using inorganic base as a catalyst,2-dihydroxymethylbutanal (DMB)was synthesized with formaldehyde and butyraldehyde taking place reaction.Then DMB and DOPO reaction synthesis DOPO ternary alcohol,last chose the reaction of DOPO ternary alcohol with dibutyltin oxide to synthetize novel spiro com-pound.And the final product through IR and NMR confirmed their molecular structure,confirm the products are all target products.Spiro compound cationic initiator volume expansion rate of the ring-opening polymeriza-tion process was 3.46%.The experiment also examines the spiro compounds of epoxy resin modified with the change of the volume expansion ratio,when the content of the spiro compounds was 20%,the epoxy resin vol-ume expansion rate of 2.67%.
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