Synthesis of Amphiphilic Star Block Copolymers and Their Evaluation as Transdermal Carriers
摘要:
Amphiphilic star polymers offer substantial promise for, a range of drug delivery applications owing to their ability to encapsulate guest molecules. One appealing but underexplored application is transdermal drug delivery using star block copolymer reverse micelles as an alternative to the more common oral and intravenous routes. We prepared 6- and 12-arm amphiphilic star copolymers via atom transfer radical polymerization. (ATRP) of sequential blocks of polar oligo (ethylene glycol)methacrylate and nonpolar lauryl methacrylate from brominated dendritic macroinitiators based on 2,2-bis(hydroxymethyl) propionic acid. These star as rhodamine B and FITC-BSA in nonpolar media via UV/vis spectroscopic studies and exhibit substantially improved encapsulation. efficiencies, relative to self assembled "1-arm" linear block analogs. Furthermore, their transdermal carrier capabilities were demonstrated in multiple dye diffusion studies using porcine skin, verifying penetration of the carriers into the stratum comeum.
Study of dynamics of the cross-linking process of hyperbranched polymers
作者:S. Maślanka、W. W. Sułkowski、A. Sułkowska
DOI:10.1007/s10973-010-0838-1
日期:2010.12
relaxation properties makes it possible to characterize the influence of polymer structure on its useful properties, i.e., stability and resistance. To determine the profile of the relaxation properties of the linear, hyperbranched and dendrite unsaturated polyester resins, the synthesis of the oligoester as the model compounds was performed. The structures of the obtained model compound were confirmed by elemental
聚合物弛豫性能的描述使得可以表征聚合物结构对其有用性能,即稳定性和抗性的影响。为了确定线性,超支化和枝状不饱和聚酯树脂的弛豫性能的概况,进行了低聚酯作为模型化合物的合成。通过元素分析确认了所得模型化合物的结构,并且11 H NMR和FTIR光谱。确定模型低聚酯的α弛豫过程可以使我们描述商品化合物的实用性能。松弛过程的描述可有助于解释聚酯的有用性能与其分子结构之间的依赖性。实验结果使我们能够改进合成工艺的技术并扩展其使用范围。
[EN] TUNED SYNTHETIC DENDRIMER CALIBRANTS FOR MASS SPECTROMETRY<br/>[FR] ETALONS AJUSTÉS DE TYPE DENDRIMÈRES SYNTHÉTIQUES POUR SPECTROSCOPIE DE MASSE
申请人:UNIV TULANE
公开号:WO2010091109A3
公开(公告)日:2011-04-07
TUNED SYNTHETIC DENDRIMER CALIBRANTS FOR MASS SPECTROMETRY
申请人:The Administrators of the Tulane Educational Fund