含次环己基有机硅单体及二聚体的NMR谱与结构

含次环已基有机硅单体及其二聚体业已成功地合成^[1],本文研究了这类新单体和二聚体的¹H-NMR、¹³C-NMR、和²⁹Si-NMR谱,从而确定了它们的结构。     

芳杂环高分子分离膜分离、透过性能的研究——聚苯基单醚喹噁啉(PPQ)超滤膜的研制

A novel polyphenylquinoxaline ultrafiltration (UF) membrane prepared by a phase inversion method was reported in this paper. The effects of some factors in preparation on membrane performance, such as temperature and duration of heat-treatment, and polymer concentration, were studied. The pure water flux and retention of bovine serum albumin (BSA) and chymotrypsinum (CMP) used as ball standard matters by membrane have been quantitatively determined. The morphological structure of polyphenylquinoxaline UF membrane was observed by SEM. The results of experiments showed that the membrane exhibited better permeability and high selectivity,partcularly useful for the seqaration of BSA. When suitable preparing condi-tion were employed,the membranes showed good strength,high hydrolytic stability and high heat-resistant qualities. The upper limit of working temperature could reach 120℃.     

芳杂环高分子分离膜分离、透过性能的研究——聚苯基单醚喹噁啉(PPQ)超滤膜的研制

随着超滤技术应用范围的不断开拓和新技术工业领域的相继出现,极待开发机械强度好并具有优良的耐温性、耐生物侵蚀性、耐酸碱和耐有机溶剂性等高性能的超滤膜材料,以满足在苛刻条件下的分离、提纯、浓缩与富集以及高温灭菌过程的需要。多年来,国内外学者陆续将多种合成高分子材料用于超滤分离技术中,特别是杂环高分子如聚酰亚胺等,其优良的机械性能、耐温性和耐生物侵蚀性颇引人注目。但是,在已开发的合成高分子超滤膜材料中,由于某些分子的主链上含有—CN、—CONH—、—COOR、—CH_2O—、     

INCORPORATION OF METAL IONS INTO POLYPHENYLQUINOXALINE

FeCl_3·6H_2O, NiCl_2, CuCl_2, ZnCl_2 and CrCl_3 have been incorporated into polyphenylquinoxaline by a new method. High-quality, flexible, glass-cast films have been obtained which exhibit increased glass transition temperature and excellent thermal stability. Moduli and tensile strengths of the metal-containing polyphenylquinoxaline films increase surprisingly at elevated temperature. Electrical resistivities of these films fall in the same order range as polyphenylquinoxaline alone. X-ray photoelectron spectroscopic study of metal-containing polyphcnylquinoxaiine films shows that all metals in these films are present in the ionic state, there is charge transfer between nitrogen of polyphenylquinoxaline and Cu~(2+), Zn~(2+) of CuCl_2, ZnCl_2 containing polyphenylquinoxaline films.     

EFFECT OF WATER ON THE CONDUCTIVITY OF PPQ (ClO_4~-) COMPLEX

The preparation of conducting PPQ film was first reported in the previous paper. It is very interesting that this film is highly sensitive to moisture in air. The hydration and dehydration of the film are accompanied by change not only in color but also in conductivity and UV-visible spectrum. The conducting PPQ is reduced to PPQ and loses its conductivity after being soaked in water.