PA 6/POSS纳米杂化材料的结构与性能

采用熔融共混方法,用环氧官能化笼型倍半硅氧烷(POSS)改性聚酰胺(PA)6,制备了PA6/POSS纳米杂化材料。研究表明:环氧化POSS可在一定程度上改善PA6的低温抗冲击性能,在w(POSS)低于3%时,可提高杂化材料的拉伸强度。此外,环氧化POSS可显著改善杂化材料的介电性能,将环氧化POSS加入PA6基体中w(POSS)为3%]可使PA6的介电常数由3.40降至2.75。差示扫描量热法和广角X射线衍射分析表明,PA6/POSS杂化材料在结晶过程中以生成α晶型为主,在本研究范围内POSS含量的变化对PA6的结晶行为影响不大。

笼型倍半硅氧烷钛化合物的合成与表征

在无水无氧条件下,通过笼型三羟基取代的不完全(异丁基)倍半硅氧烷与三氯单茂钛(CpTiCl3)、四氮二甲基钛(Ti(Me2N)4)反应制得含有倍半硅氧烷钛配合物,并对其进行了核磁和红外表征.实验结果表明,所得到的两种倍半硅氧烷钛金属衍生物分别为在缺角处引入一个钛原子和一个茂环封角以及引入一个钛原子和一个氮二甲基基团封角的衍生物.实验从分子水平上为研究钛负载型非均相催化剂的表面结构及其催化反应活性提供了均相反应模型.

The Polymeric Heterogemeous Matrix for Carbon and Glass Reinforced Plastic

This article presents the results of deformation-strength properties measurement and microstructural analysis of heterogeneous polymer matrix consisting of thermoset and thermoplastic polymers. Thermosetting material is a diamino-diphenil sulfon-cured epoxy oligomer. Polysulfone was used as thermoplastic material. Two different technological processes were used to obtain heterogeneous polymer matrix: the material was mixed in the block, or layered material was produced in which a layer of thermoplastic material alternated with a layer of epoxy oligomer.