Polymerization in lyotropic liquid crystals. 2. Synthesis of photo-cross-linkable PEO-PDMS-PEO triblock copolymers and permanent stabilization of their supermolecular structures in lyotropic mesophases
Polymerization in lyotropic liquid crystals. 2. Synthesis of photo-cross-linkable PEO-PDMS-PEO triblock copolymers and permanent stabilization of their supermolecular structures in lyotropic mesophases
复制标题
溶致液晶中的聚合。
DOI：
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发表时间：
1992
期刊：
影响因子：
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通讯作者：
G. Wegner
中科院分区：
文献类型：
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作者：
Jianling Yang;G. Wegner
以α，ω-二氢聚二甲基硅氧烷（α，ω-dihydro-PDMS）和端炔丙基聚氧乙烯单甲醚（PEO-monomethyl ethers）为原料，经铂催化硅氢加成反应，再与肉桂酰氯酯化，合成了可光交联的环氧乙烷-二甲基硅氧烷（PEO-PDMS-PEO-cinnamate）三嵌段共聚物。共聚物/水体系的溶致中间相通过紫外光照射进行光交联。交联后的超分子结构得以保留，但可被有机溶剂溶胀破坏。在蒸发溶剂后，通过加入水，膜显示原始中间相
Photocrosslinkable ethylene oxide-dimethylsiloxane PEO-PDMS-PEO-cinnamate triblock copolymers were prepared via Pt-catalyzed hydrosilylation of α,ω-dihydro-PDMS with bifunctional propargyl-terminated PEO-monomethyl ethers and subsequent esterification with cinnamoyl chloride. Lyotropic mesophases of the copolymer/water system were photocrosslinked by UV irradiation. The supermolecular structures were retained after crosslinking but could be destroyed by swelling with organic solvents. After evaporation of the solvent, the films showed the original mesophases by addition of water