碳纤维上胶剂丙烯酸酯环氧复合乳液及应用

采用自乳化法制备了甲基丙烯酸羟乙酯改性水性聚氨酯（AWPU）乳液，并与环氧（EP）乳液混合，通过红外、差示扫描量热法和热重法表征了AWPU、EP、AWPU-EP乳液在上胶过程中发生的化学反应及其耐热性能。结果表明：在温度低于300℃时，AWPU-EP复合乳液的热失重介于AWPU乳液与EP乳液之间；当温度高于350℃时，AWPU-EP复合乳液具有较好的耐热性，其最大失重速率温度由EP乳液的312.8℃和AWPU乳液的321.6℃提高到410.2℃。用AWPU质量分数为20%和80%的AWPU-EP复合乳液分别对碳纤维上胶时，所得碳纤维的集束性较好，耐磨性能优于用EP乳液上胶的碳纤维。

Acrylic ester-epoxy composite emulsion as carbon fiber sizing agent and application

The self-emulsifying hydroxyethyl methylacrylate modified waterborne polyurethane (AWPU) emulsion was prepared and mixed with epoxy (EP) emulsion. Infrared, differential scanning calorimetry and thermogravimetry were used to characterize the chemical reaction and thermal properties occurred in the process of sizing of AWPU, EP, AWPU-EP emulsions. The results show that when temperature is below 300℃, the thermal mass loss of AWPU-EP composite emulsion is between those of AWPU and EP emulsion; when temperature is above 350℃, a good thermal property is obtained. The maximum mass loss rate temperature is increased from 312.8℃ of EP emulsion and 321.6℃ of AWPU emulsion to 410.2℃. When gluing carbon fiber with AWPU mass fraction of 20% and 80% in AWPU-EP composite emulsion, carbon fiber will show superior cluster of carbon fiber and its antiwear is better than that with EP emulsion.