由于具有更好的功能性,液晶嵌段共聚物(LCBCP)有望用于开发功能性材料。利用氢化硅烷化过程中炔基和乙烯基之间反应性随温度变化的优势,报告了一系列具有嵌段共聚物模块功能性的LCBCP,它们通过独立和选择性地连接含炔基的偶氮苯部分(LC 1)和Si-H (LC 2)端子连接到设计良好的聚(苯乙烯)-嵌段-聚丁二烯(PS- b - PBs)和聚(4-乙烯基苯基二甲基硅烷)-嵌段-聚丁二烯(PVPDMS- b)中‐PBs)由活性阴离子聚合(LAP)产生。通过模块化功能化的原则,它表明,单官能化的(PVPDMS-摹-LC 1) - b -PB和PS- b - (PB- g ^ -LC 2)不仅保持独立,但也有双向合作贡献-官能化(PVPDMS-克-LC 1) - b - (PB-克-LC 2)的介晶性能和微相分离,这从差示扫描量热法(DSC)和偏振光学形态(POM)可以明显看出,并通过粉末X射线衍
A New Synthesis of Thiocyanatoalkyl (Meth)Acrylic Esters
作者:Marie-Christine Berthe、Yves Fort、Paul Caubère
DOI:10.1080/00397919208019260
日期:1992.2
Abstract The selective synthesis of thiocyanatoalkyl meth(acrylic) esters were obtained with 71 to 95 % yield under phase transfer catalysis from corresponding chloro- and bromoalkyl (meth)acrylicesters and potassium thiocyanate in presence of potassium iodide.
New selective syntheses of (meth)acrylic monomers: Isocyanates, isocyanurates, carbamates and ureas derivatives
作者:Christine Dubosclard-Gottardi、Paul Caubère、Yves Fort
DOI:10.1016/0040-4020(95)00005-s
日期:1995.2
conveniently obtained by simple condensation of potassium cyanate with ω-halogeno-alkyl (meth)acrylates under appropriated phase transfer catalytic conditions. Depending on the reaction media and the temperature, these isocyanate derivatives may be isolated, trimerized to the corresponding isocyanurates or trapped in situ as carbamates or ureas compounds.
The present invention relates to new dichroic dyes, their composition with slave materials and their use for a dichroic polymer network, a dichroic liquid crystalline polymer film (LCP film) or a dichroic liquid crystalline polymer gel, which for instance find application as electro- optical or optical devices.