High ability of a blue phase polymer based on a diacetylene alcohol derivative

The effect of prolonged UV irradiation and high temperature on a blue phase polymer film prepared by the Langmuir–Schaefer method based on 11-hydroxyundeca-6,8-diyn-1-yl N-(4-methoxyphenyl)carbamate was evaluated. The high stability of the polymer under extreme external influences was revealed. The transition of a monolayer to a bilayer with increasing surface pressure during the Langmuir layer formation was confirmed by atomic force microscopy.     

部分子结式性质的改进证明

为了更好的计算两个单变元多项式的最大公因式,20世纪初有Burside和Panton首先提出了结式的概念,在结式的基础上又提出了子结式的概念,这使得求最大公因式有了一个更系统的算法.计算机代数中关于子结式的经典定义过于繁琐,文献[1]中给出了子结式的一种简洁的定义.主要是借助文献[1]新定义的方法给出部分子结式的性质的证明及一些相应的例题,并对部分结论进行了一定的推广.     

Synthesis and Properties of Furazanyl-Substituted Acetylenes and Diacetylenes

Compounds of the acetylene and diacetylene series, containing a furazan ring, were synthesized by alkylation of 3,4-diaminofurazan and nucleophilic substitution of the nitro group in 3-amino-4-nitrofurazan under conditions of phase-transfer catalysis.     

Isomérisation thermocatalytique des esters cyclopropéniques

The thermocatalytic isomerisation of ethyl 1-methyl-2-phenyl-1-cyclopropene-3-carboxylate, ethyl 1-methyl-2-n-butyl-1-cyclopropene-3-carboxylate and ethyl 1-methyl-2-t-butyl-1-cyclopropene-3-carboxylate to furan derivatives has been studied and a mechanism for this isomerisation has been proposed.     

自交联型含氟丙烯酸酯共聚物的合成与表征

含氟丙烯酸酯;自交联;无皂乳液;接触角滞后     

熔体生长水杨酸苯脂晶体的形貌

在实验上用实时观察法和Kyropoulos技术生长水杨酸苯脂单晶,研究晶体形貌随过冷度的变化关系。在理论上采用Hartman-Perdok的PBC方法,分析水杨酸苯脂单晶形貌和晶体结构的关系。应用木原的核心势能模型,扩展了PBC理论。解析的晶体形貌与实时观察法得到的晶体形貌相当一致。 关键词：