CAJ | 학술논문

制备了酰胺扩链剂二乙酰对苯二胺、二乙酰4,4＇-二氨基二苯甲烷,与原扩链剂对比,酰胺扩链剂位阻大,大大延长了聚脲凝胶时间。通过改变扩链剂的种类和用量调整聚脲体系配方,建立了不同凝胶时间的聚脲扩链剂复配体系,实现了聚脲凝胶时间的预设控制。
제비료선알확련제이을선대분이알、이을선4,4＇-이안기이분갑완,여원확련제대비,선알확련제위조대,대대연장료취뇨응효시간。통과개변확련제적충류화용량조정취뇨체계배방,건립료불동응효시간적취뇨확련제복배체계,실현료취뇨응효시간적예설공제。
The acetylizing amine chain extenders,such as diacetyl p-phenylenediamine and 4,4′-diacetylaminodiphenylmethane were prepared for prolonging the gel time of polyurea.The reaction activity was decreased when the new chain extenders were used for polyurea chain extension reaction.Compound systems of polyurea chain extenders with different gel time were established by changing quantity of different kinds of chain extenders.The results showed that the gel time of polyurea can be controlled.