氰酸酯/G–POSS杂化材料的制备及性能研究

Preparation and Properties of CE/G–POSS Hybrid Materials

采用八环氧基笼型倍半硅氧烷(G–POSS)与双酚A型氰酸酯树脂(CE)共混制备了高性能CE/G–POSS杂化材料,考察了不同G–POSS含量时杂化材料的力学性能、热性能、介电性能和耐湿性。结果表明,G–POSS改性的CE断面存在大量波纹状和鱼鳞片状结构,增加了材料的韧性,当G–POSS含量为7份时,杂化材料的冲击强度达到最大值23.8 kJ/m2,比纯CE提高了158%;当G–POSS含量为4份时,杂化材料的介电常数由3.27下降到3.05,达到最小;随着G–POSS含量的增加,杂化材料的耐热性和耐湿性均有所下降。

Bisphenol-A dicyanate ester（CE） / glycidyl polyhedral oligomeric silsesquioxane（G-POSS） hybrid materials were prepared with G-POSS and CE via melting blend method.The mechanical properties, thermal performance, dielectric properties and wet fastness of the hybrid materials were studied.The results show that large amount of corrugated and scales flake structures are observed on the fractures of CE/G-POSS by SEM photos. Compared with the matrix, the toughness of hybrid materials were improved by G-POSS.When G-POSS content increases to 7 phr, the impact strength reaches the maximum volume 23.8 kJ / m2, which is 258% of that of pure CE.When G-POSS content increases to 4 phr, the dielectric constant decreases from 3.27 to the minimum value 3.05.Heat resistance and wet fastness of CE / G-POSS hybrid materials decrease with the increasing of G-POSS content.