Polyamide 11 (PA 11) is a widely used polyamide resin, but its application is limited since the impact properties, tensile strength, and thermal properties are not very satisfactory for industrial application. In orde...Polyamide 11 (PA 11) is a widely used polyamide resin, but its application is limited since the impact properties, tensile strength, and thermal properties are not very satisfactory for industrial application. In order to improve the mechanical properties of PA 11, in this paper, the preparation of polyamide 11/clay nanocomposites (PACN) via in-situ intercalated polymerization was reported. SEM, TEM and XRD were employed to investigate the dispersion of clay sheet in the matrix. The results indicate that clay layers were homogeneously dispersed in PA11 matrix on a nano-scale, and an exfoliated and intercalated structure co-existed in the composites. The mechanical and thermal properties of the obtained nanocomposites were improved to certain extent by the addition of clay.展开更多
以两步聚合法制得的羟基丙烯酸分散体作为大分子乳化剂,采用原位聚合法制备了固含量为58%、黏度为2 150 m Pa·s的高固含羟基丙烯酸分散体(HSAD)。研究了溶剂种类、引发剂种类与用量、原位聚合中单体添加量对HSAD性能的影响,并采用...以两步聚合法制得的羟基丙烯酸分散体作为大分子乳化剂,采用原位聚合法制备了固含量为58%、黏度为2 150 m Pa·s的高固含羟基丙烯酸分散体(HSAD)。研究了溶剂种类、引发剂种类与用量、原位聚合中单体添加量对HSAD性能的影响,并采用激光粒度仪、凝胶渗透色谱仪、透射电镜等对所制备的HSAD参数进行表征。结果表明:在溶液聚合阶段,以乙二醇丁醚为溶剂,引发剂用量为0.8%时分散体的外观最佳,黏度最小,稳定性最好;在原位聚合过程中,当使用偶氮二异丁腈作为引发剂且用量为1.5%,单体添加量占单体总量的20%时,制得的HSAD综合性能最佳。展开更多
基金We would like to express our heartfelt thanks to the China National Distinguished Young Investigator Fund(No. 29925413) and the National Natural Science Foundation of China (No. 20274028) for Financial Support.
文摘Polyamide 11 (PA 11) is a widely used polyamide resin, but its application is limited since the impact properties, tensile strength, and thermal properties are not very satisfactory for industrial application. In order to improve the mechanical properties of PA 11, in this paper, the preparation of polyamide 11/clay nanocomposites (PACN) via in-situ intercalated polymerization was reported. SEM, TEM and XRD were employed to investigate the dispersion of clay sheet in the matrix. The results indicate that clay layers were homogeneously dispersed in PA11 matrix on a nano-scale, and an exfoliated and intercalated structure co-existed in the composites. The mechanical and thermal properties of the obtained nanocomposites were improved to certain extent by the addition of clay.
文摘以两步聚合法制得的羟基丙烯酸分散体作为大分子乳化剂,采用原位聚合法制备了固含量为58%、黏度为2 150 m Pa·s的高固含羟基丙烯酸分散体(HSAD)。研究了溶剂种类、引发剂种类与用量、原位聚合中单体添加量对HSAD性能的影响,并采用激光粒度仪、凝胶渗透色谱仪、透射电镜等对所制备的HSAD参数进行表征。结果表明:在溶液聚合阶段,以乙二醇丁醚为溶剂,引发剂用量为0.8%时分散体的外观最佳,黏度最小,稳定性最好;在原位聚合过程中,当使用偶氮二异丁腈作为引发剂且用量为1.5%,单体添加量占单体总量的20%时,制得的HSAD综合性能最佳。
