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中文摘要：
利用原子转移自由基聚合(ATRP)制备了中间链段含对氰基偶氮苯尾挂液晶基元的PMAA-b-PMAZOCN-b-PMAA两亲性三嵌段共聚物.首先合成了含有偶氮苯液晶基元的甲基丙烯酸酯单体;再使用小分子双端引发剂,以对壬基联二吡啶、溴化亚铜为催化剂,通过ATRP反应制备了含偶氮苯液晶侧基的双端大分子引发剂.进一步以氯化亚铜为催化剂,用该大分子引发剂引发甲基丙烯酸叔丁酯聚合,制备了结构规则的PtBMA-b-PMAZOCN-PtBMA三嵌段共聚物.通过在三氟乙酸作用下的选择性水解,将PtBMA段中的甲基丙烯酸叔丁酯单体单元转化为甲基丙烯酸,得到了两端亲水,中间疏水的两亲性ABA三嵌段共聚物.用1H-NMR、GPC、PLM、DSC等对产物进行了表征.并利用溶剂诱导微相分离的方法,研究了该共聚物在THF/水混合溶剂中的自组装行为.TEM结果显示,在采用的亲疏水链段比例的条件下,得到了囊泡结构.囊泡结构的平均直径在300~500 nm.在固态下经过紫外光照射,囊泡结构转变为实心胶体球.
英文摘要：
Atom transfer radical polymerization(ATRP) was applied to prepare an amphiphilic azobenzene-containing ABA triblock copolymer PMAA-b-PMAZOCNb-PMAA.In the presence of(4,4′-di(n-nonyl)-2,2′-)bipyridine(bpy9) and CuBr(as the catalyst),the dibromo-initiator butylene di(2-bromoisobutyrate) was reacted with the azobenzene-containing monomer,6-[4-(4′-cyanophenylazo)phenoxy]hexyl methacrylate(MAZOCN),which resulted in the macro-initiator.The absolute molecular weight of the macro-initiator was obtained by GPC-SLS(g...
同期刊论文项目
同项目期刊论文
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Azo Polymer Microspherical Cap Array: Soft-lithographic Fabrication and Photoinduced Shape Deformati
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Formation of Ordered Mesoporous Films from In Situ Structure Inversion of Azo Polymer Colloidal Arra
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Formation of Photoresponsive Uniform Colloidal Spheres from an Amphiphilic Azobenzene-Containing Ran
Size-Dependent Light-Driven Effect Observed for Azo Polymer Colloidal Spheres with Different Average
Hollow Capsules Constructed of Poly(thiophene-3-acetic acid) and Hyperbranched Azobenzene-containing
Photoinduced Mass-Migration Behavior of Two Amphiphilic Side-Chain Azo Diblock Copolymers with Diffe
Polyimides with main-chain photosensitive groups: Synthesis, characterization and their properties a
Photoresponsive layer-by-layer ultrathin films prepared from a hyperbranched azobenzene-containing p
Amphiphilic block copolymers bearing strong push-pull azo chromophores: Synthesis, micelle formation
The photoinduced surface-relief-grating formation behavior of side-chain azo polymers with narrow M-
Fabrication of photoresponsive electrostatic multilayers containing diazonium-hyperbranched azo poly
Electrostatic layer-by-layer self-assembly on colloidal spheres and capsules composed of azo polyele
Influences of structure and preparation conditions on size and photoresponsive properties of amphiph
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Influence of Chromophoric Electron-Withdrawing Groups on Photoinduced Deformation of Azo Polymer Col
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