固化促进剂对快速固化EP胶粘剂性能的影响

以E-51/TDE-85为复合EP(环氧树脂),三氟化硼乙胺、DMP-30[2,4,6-三(二甲氨基甲基)苯酚]和2,4-咪唑为固化促进剂,三氧化二铝(Al2O3)为填料,采用自制固化剂制备快固型EP胶粘剂。研究结果表明:促进剂的加入可不同程度加速EP胶粘剂的固化速率、缩短固化时间;与其他两种促进剂相比,三氟化硼乙胺具有良好的潜伏性,以此作为促进剂时,相应EP胶粘剂的颜色、固化速率和剥离强度等俱佳;当固化温度为150℃、固化时间为10 min和w(三氟化硼乙胺)=1%(相对于EP总质量而言)时,EP胶粘剂的综合性能相对最好。

快速固化环氧胶用聚酰胺固化剂的合成及性能

采用熔融缩聚法合成新型聚酰胺,以二乙烯三胺、三乙烯四胺、二酸为原料制备聚酰胺,并对聚合产物结构进行了红外表征。讨论了反应温度、反应时间、原料配比对产物性能的影响,研究环氧树脂固化剂的最佳制备工艺,最后将文章合成的聚酰胺固化剂与二氨基二苯砜配制成复合固化剂。重点讨论复合固化剂的最佳配比及使用复合固化剂制备胶粘剂时,其最佳固化剂配比,通过实验方法确定胶膜在(150-170)℃下,10min内可完全固化。结果表明:当酸胺的物质量的配比为1:2时,酰胺化反应在180℃反应2h,所得固化剂的性能最好;复合固化剂4,4’一二氨基二苯砜(DDS):聚酰胺(PA)最佳配比为1:5时,环氧树脂与复合固化剂的质量比为10:1时,制备的环氧快速固化包封膜在(150-170)℃下,10min固化条件下,剥离强度为1.35N/mm,性能优良。制备的快速固化环氧包封膜固化速度快,综合性能良好,具有较高的剥离强度、合适的溢胶量、良好的耐焊性和耐酸碱性能,满足FPC生产的要求。

一种快速固化白色涂料的制备

本文制备出一种可快速固化的白色涂料,涂覆于聚酰亚胺(PI)薄膜上,应用于挠性印制电路板(FPC)的外层保护材料,即包封膜的方面,可以提高生产效率,降低生产成本。文章主要研究了涂料的固化工艺、热学性能及涂层的白度、光泽度、附着力、剥离强度、耐锡焊性等性能。实验结果表明,涂料具有固化速度快、附着力强、柔韧性好、耐热性能优越等特点,满足FPC包封膜生产需求。

快速固化白色涂料的制备

包封膜是挠性印制电路板(FPC)的外层保护材料,用于保护未经特殊处理的线路不受环境和人为因素的损害。文章制备出一种可快速固化的白色涂料,涂覆于PI薄膜上,应用于FPC包封膜的生产中,可以提高生产效率,降低生产成本。文章主要研究了涂料的固化工艺、热学性能及涂层的白度、光泽度、附着力、剥离强度、耐锡焊性等性能。实验结果表明,涂料具有固化速度快、附着力强、柔韧性好、耐热性能优越等特点,满足FPC包封膜生产需求。

Preparation and stability studies of dimethyl curcumin niosomes

In the present work, we aimed to optimize the preparation technology of dimethyl curcumin niosomes, improve its solubility and assess its stability. The novel anti-androgen dimethyl curcumin niosomes were prepared by thin-film dispersion-ultrasonic method, and the prescription composition and preparation process were optimized by single-factor investigation method. Certainly, the solubility and quality evaluation of dimethyl curcumin niosomes were also investigated. The average particle size of prepared dimethyl curcumin niosomes was （310.3＋0.9） nm. The highest encapsulation rate was 88.1%± 1.7%, and the drug-loading amount was 4.03%±1.05%. Moreover, the leakage rate was below 2% within 45 d. Collectively, all these findings indicated that the niosomes, as a vector, could significantly improve the solubility and stability of dimethyl curcumin, offering a theoretical basis for dimethyl curcumin as an anticancer drug in medicine application.