利用钛酸酯系偶联剂进行表面改性

1 前言偶联剂随着复合材料的开发而发展。以本世纪40年代玻璃纤维增强塑料的出现为契机,复合材料的开发趋向活跃,硅烷偶联剂开始用作玻璃纤维处理剂,自此之后对偶联剂展开了大量的研究。近年来,在各个技术领域特别是电子学、汽车、建筑等领域和有     

杀菌剂苯菌灵的结构鉴定及其核磁共振研究

用红外、质谱、核磁共振等手段确证了江阴农药厂合成的苯菌灵的化学结构,并进行了该化合物核磁共振谱线的归属。     

一种新型高温聚合物多层电容器

本文介绍了以聚丙烯酸酯作介质,采用连续高速真空工艺所生产的聚合物多层电容器(PML)的材料、工艺及性能。该电容器在300℃以上仍具有热稳定性,薄膜无气孔,具有稳定的电气性能。其薄膜厚度在0.3和1.0μm之间,层数为1000～5000层之间。电容器具有高比容,且适宜表面安装。     

我国PET市场年均增速将达13％

PCI公司最新出版的《亚太地区聚对苯二甲酸乙二酯（PET）包装材料树脂供求报告》指出，未来10年中国PET市场预计将以年均13％的速度增长，从而带动整个亚太地区在未来10年保持11％的年增长速度，到2014年，中国PET市场份额将进一步增至44％。     

国外专利文献

甘油三乙酸酯（三醋精）的生产；乙酸丁酯的生产；羧酸酯的生产；苯甲醚的醋酐酰化作用研究；苯并咪唑衍生物的制备……     

Lutein and lutein esters in marigold flowers by high performance chromatography

Lutein and lutein esters in marigold flowers was quantitatively determined by high performance chromatography (HPLC) with ODS-C18 column. A mixture of CH3CN-CH3OH-CH3COOCH2CH2 with volume ratio of 55:1:44 was used as mobile phase at a flow rate of 1.0mL/min and detection was carried out at 480 nm. The column temperature was about 20℃. The contents of lutein and lutein esters were determined by analytical curve of lutein since lutein and lutein esters have the same spectral characteristics. Determination results of hexane extracts and saponified samples of lutein show that the saponification transforms the esters into free lutein. The increase of the content of dipalmitate and palmitate stearate reveals that the reaction includes transesterifications.