CAJ | 학술논문

用邻甲基苯胺对双氰胺进行改性，制备了一种新型的改性双氰胺固化剂。对合成条件进行优化，并对其固化条件进行了研究。结果表明，邻甲基苯胺改性双氰胺的较佳工艺条件为：邻甲苯胺与盐酸的物质的量比为1∶1.1，邻甲苯胺与双氰胺的物质的量比为1∶1.4，于90℃反应3.5 h，收率为87.01%，原料利用率为74.74%。通过测试涂层硬度来考查固化工艺与性能。结果表明，作为环氧树脂固化剂单独使用时，质量比1∶10，固化温度为130℃，HV1=35.98.比双氰胺体系固化温度降低了30℃。
용린갑기분알대쌍청알진행개성，제비료일충신형적개성쌍청알고화제。대합성조건진행우화，병대기고화조건진행료연구。결과표명，린갑기분알개성쌍청알적교가공예조건위：린갑분알여염산적물질적량비위1∶1.1，린갑분알여쌍청알적물질적량비위1∶1.4，우90℃반응3.5 h，수솔위87.01%，원료이용솔위74.74%。통과측시도층경도래고사고화공예여성능。결과표명，작위배양수지고화제단독사용시，질량비1∶10，고화온도위130℃，HV1=35.98.비쌍청알체계고화온도강저료30℃。
A novel curing agent,o-toluidine modified dicyandiamide was prepared. The optimum synthesis conditions and the curing properties were studied. The results showed that the better synthesis conditions are as follows:the mole ratio of o-toluidine to hydrochloric acid is 1:1.1, the mole ratio of dicyandiamide to o-toluidine is 1.4:1, the reaction temperature and time are 90℃ and 3.5 h respectively and the yield of o-toluidine modified dicyandiamide is up to 87.01%and the utilization of raw materials is up to 74.74%.The curing process and the properties of cured were investigated using the hardness tests of the epoxy resin.The results showed that when dicyandiamide modified by o-toluidine is used as the curing agent, the weight ratio of curing agent to epoxy resin is one to ten and the curing temperature is 130℃,the HV1 value is 35.98 which is 30℃lower than that of alone dicyandiamide system.