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首页> 外文期刊>Macromolecules >PCL Star Polymer,PCL-PS Heteroarm Star Polymer by ATRP,and Core-Carboxylated PS Star Polymer Thereof
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PCL Star Polymer,PCL-PS Heteroarm Star Polymer by ATRP,and Core-Carboxylated PS Star Polymer Thereof

机译:PCL星形聚合物,ATRP的PCL-PS杂弹星形聚合物及其核-羧基化PS星形聚合物

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摘要

Poly(omega-caprolactone)(PCL)star polymer with a cross-linked microgel core was synthesized by atom-transfer radical polymerization (ATRP)of divinylbenzene (DVB)using mono-2-bromoisobutyryl PCL ester as a macroinitiator.Then pory(omega-caprolactone)-porystyrene (PCL-PS)heteroarm star polymer was produced subsequently by grafting PS from the core of PCL star polymer in which the initiating groups were inherited from PCL star formation using ATRP.Characterization by size exclusion chro-matography (SEC)and ~1H NMR demonstrated the successful preparation of the target star polymers.Since the PCL was linked with the core through an ester group,the bare microgels bearing carboxylic acid or ester groups were produced by hydrolysis or alcoholysis to degrade the PCL chains of the PCL star polymers,respectively.PS star polymer with a core functionalized with carboxylic acid groups was also prepared by the hydrolysis of PCL-PS heteroarm star polymer.To illustrate the unique characteristics of this novel core-functionalized PS star polymer,it was used to prepare monodispersed lead sulfide (PbS)nanoparticles.
机译:以单-2-溴异丁酰基PCL酯为大分子引发剂,通过二乙烯基苯(DVB)的原子转移自由基聚合(ATRP)合成了具有交联微凝胶核的聚(ω-己内酯)(PCL)星形聚合物。随后通过从PCL星型聚合物的核心接枝PS(其中的起始基团是使用ATRP从PCL星型形成中继承的)接枝生产出了己内酯)-多孔苯乙烯(PCL-PS)杂多星型聚合物,通过尺寸排阻色谱(SEC)进行了表征并且〜1H NMR证明了目标星形聚合物的成功制备。由于PCL通过酯基与核连接,通过水解或醇解反应降解PCL的PCL链,生成了带有羧酸或酯基的裸露微凝胶。还通过水解PCL-PS杂臂星形聚合物制备了具有被羧酸基团官能化的核的PS星形聚合物。新型核官能化PS星形聚合物,用于制备单分散硫化铅(PbS)纳米颗粒。

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